Fluorinated liquid composition and use thereof

Abstract

A fluorinated liquid composition and a use thereof. The fluorinated liquid composition comprises perfluoro or polyfluoroester, and further comprises any one or any two of perfluoro or polyfluoroalkane, perfluoro or polyfluoroolefin, perfluoro or polyfluoroalcohol, perfluoro or polyfluoroether, and perfluoro or polyfluoroketone. The fluorinated liquid composition has a high thermal conductivity coefficient and a good heat dissipation effect, and can be applied to a chip heat dissipation system, a large-scale server heat dissipation system, a supercomputing data center heat dissipation system, a new energy vehicle thermal management system and the like.

Description

A fluorinated liquid composition and its application

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to Chinese patent application number 2023114367744, filed with the State Intellectual Property Office of China on October 30, 2023, entitled “A fluorinated liquid composition and its application,” the entire contents of which are incorporated herein by reference. Technical Field

[0003] The present disclosure relates to the field of liquid cooling technology, and in particular to a fluorinated liquid composition and applications thereof. Background Art

[0004] An azeotropy refers to a mixed solution at equilibrium where the gas and liquid phases have identical compositions. The corresponding temperature is called the azeotropic temperature or azeotropic point. An azeotrope is a two- or multi-component liquid mixture that maintains both composition and boiling point when boiling at constant pressure. When an azeotrope reaches its azeotropic point, the composition ratio of the gaseous portion produced by boiling is identical to that of the liquid portion. Azeotropes are classified into three categories based on their azeotropic points: positive azeotropes, negative azeotropes, and heterogeneous azeotropes. A solution is called a positive azeotrope when the boiling point of the azeotropic point is lower than the boiling points of all its components; a solution is called a negative azeotrope when the boiling point of the azeotropic point is higher than the boiling points of all its components; and a heterogeneous azeotrope when two components are not completely miscible (i.e., the solution contains two or more liquid phases), and azeotropy occurs within the gap between the two components, resulting in a heterogeneous azeotrope.

[0005] Fluorinated liquid is a chemical solvent that is colorless, transparent, odorless, safe and non-toxic. Currently, the thermal conductivity and heat dissipation of coolants containing fluorinated liquids need to be further improved.

[0006] Summary of the Invention

[0007] The present disclosure provides a fluorinated liquid composition comprising a perfluoro or polyfluoro ester, wherein the fluorinated liquid composition further comprises any one or any two of a perfluoro or polyfluoro alkane, a perfluoro or polyfluoro olefin, a perfluoro or polyfluoro alcohol, a perfluoro or polyfluoro ether, and a perfluoro or polyfluoro ketone;

[0008] The fluorinated liquid composition is an azeotrope or azeotrope-like compound composed of various components.

[0009] In an alternative embodiment, the difference in boiling point between the highest boiling component and the lowest boiling component in the fluorinated fluid composition does not exceed 30°C.

[0010] In an optional embodiment, the fluorinated liquid composition is selected from: perfluoro or polyfluoro ester and perfluoro or polyfluoro alkane; perfluoro or polyfluoro ester and perfluoro or polyfluoro olefin; perfluoro or polyfluoro ester and perfluoro or polyfluoro alcohol; perfluoro or polyfluoro ester and perfluoro or polyfluoro ether; perfluoro or polyfluoro ester and perfluoro or polyfluoro ketone; perfluoro or polyfluoro ester, perfluoro or polyfluoro alkane and perfluoro or polyfluoro olefin; perfluoro or polyfluoro ester, perfluoro or polyfluoro alkane and perfluoro or polyfluoro alcohol; perfluoro or polyfluoro ester, perfluoro or polyfluoro alkane and perfluoro or polyfluoro or polyfluoroether; perfluoro or polyfluoro ester, perfluoro or polyfluoro alkane and perfluoro or polyfluoro ketone; perfluoro or polyfluoro ester, perfluoro or polyfluoro olefin and perfluoro or polyfluoro alcohol; perfluoro or polyfluoro ester, perfluoro or polyfluoro olefin and perfluoro or polyfluoro ether; perfluoro or polyfluoro ester, perfluoro or polyfluoro olefin and perfluoro or polyfluoro ketone; perfluoro or polyfluoro ester, perfluoro or polyfluoro alcohol and perfluoro or polyfluoro ether; perfluoro or polyfluoro ester, perfluoro or polyfluoro alcohol and perfluoro or polyfluoro ketone; perfluoro or polyfluoro ester, perfluoro or polyfluoro ether and perfluoro or polyfluoro ketone.

[0011] In an optional embodiment, the perfluoro or polyfluoro ester is selected from any one of methyl trifluoropyruvate, ethyl pentafluoropropionate, ethyl trifluoropyruvate, 2,2,2-trifluoroethyl formate, trifluoroethanol acetate, trifluoroethanol trifluoroacetate, methyl pentafluoropropionate, methyl heptafluorobutyrate, methyl heptafluoroisobutyrate, isopropyl trifluoroacetate, ethyl trifluoroacetate, methyl trifluoroacetate and hexafluoroisopropyl acetate.

[0012] In an alternative embodiment, the perfluoro or polyfluoro ester is selected from 2,2,2-trifluoroethyl formate, hexafluoroisopropyl acetate, ethyl trifluoroacetate or methyl trifluoroacetate.

[0013] In an optional embodiment, the perfluoro or polyfluoroalkane is selected from any one of perfluoro(methylcyclohexane), perfluoro-2-methylpentane, 1H-perfluorohexane, perfluoro-n-pentane, 1H-perfluoropentane, perfluoro-1,2-dimethylcyclobutane, perfluorokerosene, perfluorohexane, hexafluorobenzene, hexafluoroheptane, 2H,3H-decafluoropentane and 1,1,2,2,3,3,4,4,5-nonafluorocyclopentane.

[0014] In an alternative embodiment, the perfluoro or polyfluoroalkane is selected from perfluoro-2-methylpentane or 2H,3H-decafluoropentane.

[0015] In an optional embodiment, the fluorinated liquid composition consists of hexafluoroisopropyl acetate and perfluoro-2-methylpentane; or, the fluorinated liquid composition consists of hexafluoroisopropyl acetate and 2H,3H-decafluoropentane.

[0016] In an optional embodiment, the perfluoro or polyfluoro olefin is selected from any one of 1H,1H,2H-perfluoro-1-hexene, 1H-perfluorobut-1-ene, octafluorocyclopentene, perfluorohept-1-ene, perfluoro(2-methyl-2-pentene), perfluorohex-1-ene, dodecafluoro-1,9-decadiene and 6H-perfluoro-1-hexene.

[0017] In an optional embodiment, the fluorinated liquid composition consists of hexafluoroisopropyl acetate and perfluoro(2-methyl-2-pentene); or, the fluorinated liquid composition consists of methyl pentafluoropropionate and perfluorohex-1-ene; or, the fluorinated liquid composition consists of hexafluoroisopropyl acetate, perfluoro-2-methylpentane and perfluoro(2-methyl-2-pentene); or, the fluorinated liquid composition consists of ethyl trifluoroacetate, 1H-perfluoropentane and perfluoro(2-methyl-2-pentene).

[0018] In an optional embodiment, the perfluoro or polyfluoro alcohol is selected from any one of perfluoro-tert-butanol, 2,2,2-trifluoroethanol, 2,2,3,3,3-pentafluoro-1-propanol, 1,1,1,3,3,3-hexafluoro-2-methyl-2-propanol, 1,1,1,3,3,3-hexafluoro-2-propanol and 2,2,3,3,4,4,4-heptafluoro-1-butanol.

[0019] In an optional embodiment, the fluorinated liquid composition consists of hexafluoroisopropyl acetate and perfluoro-tert-butanol; or, the fluorinated liquid composition consists of methyl trifluoroacetate and perfluoro-tert-butanol; or, the fluorinated liquid composition consists of hexafluoroisopropyl acetate, perfluoro-2-methylpentane and perfluoro-tert-butanol; or, the fluorinated liquid composition consists of hexafluoroisopropyl acetate, perfluoro(2-methyl-2-pentene) and perfluoro-tert-butanol.

[0020] In an optional embodiment, the perfluoro or polyfluoro ether is selected from perfluorobutyl methyl ether, perfluoroisobutyl methyl ether, bis(2,2,2-trifluoroethyl) ether, fluoromethyl-1,1,1,3,3,3-hexafluoroisopropyl ether, 2,2,2-trifluoroethyl methyl ether, 2,2,3,3,3-pentafluoropropyl methyl ether, heptafluoropropyl 1,2,2,2-tetrafluoroethyl ether, difluoromethyl 2,2,3,3-tetrafluoropropyl ether, heptafluoroisopropyl methyl ether, bis-(1,2,2,2-tetrafluoroethyl) ether, 1,1,2,2-tetrafluoroethyl ethyl ether, ethyl 1,1,2,3,3,3-hexafluoropropyl ether, methyl 2,2,3,3,3-pentafluoropropyl ether, allyl heptafluoroisopropyl ether, 1,1,2,2-tetrafluoroethyl 2,2,3,3-tetrafluoropropyl ether, 1,1,2,3,3,3-hexafluoropropyl methyl ether and 1,1,2,2-tetrafluoroethyl methyl ether.

[0021] In an optional embodiment, the fluorinated liquid composition consists of hexafluoroisopropyl acetate and fluoromethyl-1,1,1,3,3,3-hexafluoroisopropyl ether; or, the fluorinated liquid composition consists of methyl trifluoroacetate and 1,1,2,3,3,3-hexafluoropropyl methyl ether; or, the fluorinated liquid composition consists of hexafluoroisopropyl acetate, perfluoro-2-methylpentane and methyl 2,2,3,3,3-pentafluoropropyl ether; or, the fluorinated liquid composition consists of hexafluoroisopropyl acetate, perfluoro(2-methyl-2-pentene) and methyl 2,2,3,3,3-pentafluoropropyl ether; or, the fluorinated liquid composition consists of ethyl trifluoroacetate, 1,1,1,3,3,3-hexafluoro-2-propanol and heptafluoropropyl 1,2,2,2-tetrafluoroethyl ether.

[0022] In an optional embodiment, the perfluoro or polyfluoroketone is selected from any one of methyl perfluorobutyl ketone, 3H-perfluoropentane-2,4-dione, 1,1,1,2,2,4,5,5,5-nonafluoro-4-(trifluoromethyl)-3-pentanone, methyl pentafluoroethyl ketone, methyl heptafluoropropyl ketone and methyl pentafluoroheptyl ketone.

[0023] In an optional embodiment, the fluorinated liquid composition consists of hexafluoroisopropyl acetate and 1,1,1,2,2,4,5,5,5-nonafluoro-4-(trifluoromethyl)-3-pentanone; or, the fluorinated liquid composition consists of methyl trifluoroacetate and perfluorohexanone; or, the fluorinated liquid composition consists of hexafluoroisopropyl acetate, 2H,3H-decafluoropentane and perfluorohexanone; or, the fluorinated liquid composition consists of 2,2,2-trifluoroethylformate, perfluorohex-1-ene and methyl pentafluoroheptyl ketone; or, the fluorinated liquid composition consists of methyl trifluoroacetate, perfluorotert-butanol and methyl pentafluoroethyl ketone; or, the fluorinated liquid composition consists of hexafluoroisopropyl acetate, heptafluoroisopropyl methyl ether and methyl pentafluoroheptyl ketone.

[0024] In an optional embodiment, the fluorinated liquid composition further has at least one of the following characteristics:

[0025] Feature 1: The thermal conductivity of the fluorinated liquid composition is ≥0.08W / (m·k);

[0026] Feature 2: The boiling point of the fluorinated liquid composition is 30-80°C;

[0027] Feature 3: The dielectric constant of the fluorinated liquid composition at 1 kHz is ≤5.

[0028] The present disclosure provides the use of the above-mentioned fluorinated liquid composition in preparing a cooling medium.

[0029] In an optional embodiment, the cooling medium is an immersion cooling medium.

[0030] In an optional embodiment, the cooling medium is used in a liquid cooling system of an electronic device.

[0031] In an optional embodiment, the liquid cooling system of the electronic device includes a chip cooling system, a server cooling system, a supercomputing data center cooling system, or a new energy vehicle thermal management system.

[0032] The present disclosure provides a liquid cooling system, which includes an electronic device and a cooling medium prepared from the above-mentioned fluorinated liquid composition, wherein the electronic device is immersed in the liquid cooling medium. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0034] FIG1 is a schematic diagram of a data center immersion cooling system according to the present disclosure. DETAILED DESCRIPTION

[0035] To make the purpose, technical solutions, and advantages of the embodiments of the present disclosure more clear, the technical solutions in the embodiments of the present disclosure are described clearly and completely below. Where specific conditions are not specified in the embodiments, conventional conditions or conditions recommended by the manufacturer were followed. Reagents or instruments used where the manufacturer is not specified are conventional products that can be purchased commercially.

[0036] First, let's introduce the application scenarios of the embodiments of the present disclosure. As shown in Figure 1, the fluorinated liquid composition provided by the present disclosure can be added to a closed server system. Through vaporization phase transition, it absorbs heat, removing heat generated during server operation. The vaporized fluorinated liquid gas then contacts a heat exchange system, reliquefies, and flows back into the server's cooling system.

[0037] The fluorinated liquid composition provided by the present disclosure and its application are described in detail below.

[0038] The embodiments of the present disclosure provide a fluorinated liquid composition and its application. The fluorinated liquid composition has a high thermal conductivity and good heat dissipation effect.

[0039] The present disclosure provides a fluorinated liquid composition comprising a perfluoro or polyfluoro ester and any one or any two of a perfluoro or polyfluoro alkane, a perfluoro or polyfluoro olefin, a perfluoro or polyfluoro alcohol, a perfluoro or polyfluoro ether, and a perfluoro or polyfluoro ketone. The fluorinated liquid composition is an azeotrope or azeotrope-like mixture of the components.

[0040] The fluorinated liquid composition may also be referred to as a "high thermal conductivity, low boiling point fluorinated liquid azeotrope or azeotrope-like composition," specifically referring to a fluorinated liquid azeotrope or azeotrope-like composition that, under standard atmospheric pressure, has a constant temperature point when boiling or evaporating, or has a constant composition ratio in the liquid and vapor phases, or exhibits a tendency not to fractionate. "Azeotrope-like" specifically refers to the phenomenon that when the composition is heated above its boiling point, its liquid temperature fluctuates around the boiling point.

[0041] The present invention discloses a fluorinated liquid composition in the form of an azeotrope or azeotrope-like by using any one or any two of perfluoro or polyfluoroalkanes, perfluoro or polyfluoroolefins, perfluoro or polyfluoroalcohols, perfluoro or polyfluoroethers, and perfluoro or polyfluoroketones in combination with perfluoro or polyfluoroesters. The fluorinated liquid composition can have the properties of high thermal conductivity, low boiling point, and high insulation.

[0042] The fluorinated liquid composition in the embodiments of the present disclosure includes a "binary fluorinated liquid organic matter" or a "ternary fluorinated liquid organic matter". For ease of understanding and distinction, the "binary fluorinated liquid organic matter" may include a perfluoroester or polyfluoroester as a base component and any one of a perfluoroalkane or polyfluoroolefin, a perfluoroalkane or polyfluoroalkenyl, a perfluoroalkane or polyfluoroalcohol, a perfluoroether or polyfluoroether, and a perfluoroketone; the "ternary fluorinated liquid organic matter" may include a perfluoroester or polyfluoroester as a base component and any two of a perfluoroalkane or polyfluoroolefin, a perfluoroalkane or polyfluoroalcohol, a perfluoroether or polyfluoroether, and a perfluoroketone.

[0043] The present invention discloses a fluorinated liquid composition in the form of an azeotrope or azeotrope-like by using any one or any two of perfluoro or polyfluoroalkanes, perfluoro or polyfluoroolefins, perfluoro or polyfluoroalcohols, perfluoro or polyfluoroethers, and perfluoro or polyfluoroketones in combination with perfluoro or polyfluoroesters. The fluorinated liquid composition can have the properties of high thermal conductivity, low boiling point, and high insulation.

[0044] For example, the above-mentioned "binary fluorine-containing liquid organic matter" solution may include:

[0045] Option 1: Perfluoro or polyfluoro ester and perfluoro or polyfluoro alkane;

[0046] Option 2: Perfluoro or polyfluoro ester and perfluoro or polyfluoro olefin;

[0047] Option 3: Perfluoro or polyfluoro ester and perfluoro or polyfluoro alcohol;

[0048] Option 4: Perfluoro or polyfluoro ester and perfluoro or polyfluoro ether;

[0049] Option 5: Perfluoro or polyfluoro ester and perfluoro or polyfluoro ketone.

[0050] The above-mentioned "ternary fluorine-containing liquid organic matter" scheme may include:

[0051] Option 1: Perfluoro or polyfluoro esters, perfluoro or polyfluoro alkanes and perfluoro or polyfluoro olefins;

[0052] Option 2: Perfluoro or polyfluoro esters, perfluoro or polyfluoro alkanes and perfluoro or polyfluoro alcohols;

[0053] Option 3: Perfluoro or polyfluoro esters, perfluoro or polyfluoro alkanes and perfluoro or polyfluoro ethers;

[0054] Option 4: Perfluoro or polyfluoro esters, perfluoro or polyfluoro alkanes and perfluoro or polyfluoro ketones;

[0055] Option 5: Perfluoro or polyfluoro esters, perfluoro or polyfluoro olefins and perfluoro or polyfluoro alcohols;

[0056] Option 6: Perfluoro or polyfluoro esters, perfluoro or polyfluoro olefins and perfluoro or polyfluoro ethers;

[0057] Scheme 7: Perfluoro or polyfluoro esters, perfluoro or polyfluoro olefins and perfluoro or polyfluoro ketones;

[0058] Option 8: Perfluoro or polyfluoro esters, perfluoro or polyfluoro alcohols and perfluoro or polyfluoro ethers;

[0059] Scheme 9: Perfluoro or polyfluoro esters, perfluoro or polyfluoro alcohols and perfluoro or polyfluoro ketones;

[0060] Option 10: Perfluoro or polyfluoro esters, perfluoro or polyfluoro ethers and perfluoro or polyfluoro ketones.

[0061] In the present disclosure, the “high thermal conductivity” of the fluorinated liquid composition means that the thermal conductivity of the fluorinated liquid composition is ≥ 0.08 W / (m·K) as measured by the transient hot wire method according to ASTM D7896.

[0062] The "low boiling point" of the fluorinated liquid composition means that the boiling point of the fluorinated liquid composition under standard atmospheric pressure is 30-80°C.

[0063] The fluorinated liquid composition also has high insulation properties. Specifically, according to GB / T1409-2006, its corresponding dielectric constant at about 1 kHz is ≤5.

[0064] In the present disclosure, the boiling point difference between the highest-boiling-point component and the lowest-boiling-point component in the fluorinated liquid composition is no more than approximately 30°C. That is, the boiling points of the two components in a binary fluorinated liquid organic material do not differ by more than approximately 30°C, and the boiling points of the highest-boiling-point component and the lowest-boiling-point component in a ternary fluorinated liquid organic material also do not differ by more than approximately 30°C. This arrangement minimizes the differences between components, making it easier to obtain a stable fluorinated liquid composition with high thermal conductivity and excellent insulation properties.

[0065] In some implementations, the perfluoro or polyfluoro esters may be exemplarily selected from methyl trifluoropyruvate (CF3-CO-CO-O-CH3), ethyl pentafluoropropionate (CF3-CF2-CO-O-CH2CH3), ethyl trifluoropyruvate (CF3-CO-CO-O-CH2CH3), 2,2,2-trifluoroethyl formate (CF3-CH2-O-CO-H), trifluoroethanol acetate (CH3COOCH2CF3), trifluoroethanol trifluoroacetate (CF3COOCH2CF3), Any one of methyl pentafluoropropionate (CF3-CF2-CO-O-CH3), methyl heptafluorobutyrate (CF3CF2CF2-CO-O-CH3), methyl heptafluoroisobutyrate (CF3CFCF3-CO-O-CH3), isopropyl trifluoroacetate (CF3-CO-O-CHCH3CH3), ethyl trifluoroacetate (CF3CO-O-CH2CH3), methyl trifluoroacetate (CF3CO-OCH3) and hexafluoroisopropyl acetate (CH3-CO-OCH(CF3)2).

[0066] The above-mentioned perfluoro or polyfluoro esters with different physical properties and other fluorine-containing organic liquid compounds are mixed to obtain azeotropes or azeotrope-like compositions, which can better adjust the boiling point of the fluorinated liquid-immersion cooling medium.

[0067] For example, the perfluoro or polyfluoro ester is selected from 2,2,2-trifluoroethyl formate, hexafluoroisopropyl acetate, ethyl trifluoroacetate or methyl trifluoroacetate, and is then combined with other polyfluoro or perfluoro organic compounds to form a binary or ternary azeotrope or azeotrope-like composition.

[0068] The selection of the above-mentioned perfluoro or polyfluoro ester is conducive to obtaining an azeotrope or azeotrope-like composition with a low boiling point, high thermal conductivity and good insulation.

[0069] In some implementations, the perfluoro or polyfluoroalkane may be selected from perfluoro(methylcyclohexane) (C6F 11 -CF3), perfluoro-2-methylpentane (CF3-CF2-CF2CF(CF3)2), 1H-perfluorohexane (CF3(CF2)4-CHCF2), perfluoro-n-pentane (CF3(CF2)3CF3), 1H-perfluoropentane (CF3(CF2)3CHF2), perfluoro-1,2-dimethylcyclobutane (C4F6-(CF3)2), perfluorokerosene (low boiling point, boiling point ≤90°C), perfluorohexane (CF3(CF2)4CF3), hexafluorobenzene (C6F6), hexafluoroheptane (CF3(CF2)5CF3), 2H,3H-decafluoropentane (CF3CHFCHFCF2CF3) and 1,1,2,2,3,3,4,4,5-nonafluorocyclopentane (C5HF9).

[0070] The selection of the above-mentioned perfluoro or polyfluoroalkanes is conducive to obtaining azeotropes or azeotrope-like compositions with lower boiling points, higher thermal conductivity and better insulation properties.

[0071] In an optional embodiment, the fluorinated liquid composition comprises a perfluoro- or polyfluoroester and a perfluoro- or polyfluoroalkane, wherein the mass of the perfluoro- or polyfluoroester is 47% to 76%, for example, 60.24% to 75.19% or 47.62% to 62.50%, based on the total mass of the fluorinated liquid composition as 100%. Exemplarily, the perfluoro- or polyfluoroalkane is selected from perfluoro-2-methylpentane or 2H,3H-decafluoropentane.

[0072] For example, the fluorinated liquid composition comprises hexafluoroisopropyl acetate and perfluoro-2-methylpentane, wherein the mass of hexafluoroisopropyl acetate may be 60.24%-75.19% and the mass of perfluoro-2-methylpentane may be 24.81%-39.76%. Alternatively, the fluorinated liquid composition comprises hexafluoroisopropyl acetate and 2H,3H-decafluoropentane, wherein the mass of hexafluoroisopropyl acetate may be 47.62%-62.50% and the mass of 2H,3H-decafluoropentane may be 37.5%-52.38%.

[0073] By selecting the above substances to form a fluorinated liquid composition, an azeotrope or azeotrope-like composition with a low boiling point, high thermal conductivity and good insulation can be obtained.

[0074] In some embodiments, the above-mentioned perfluoro or polyfluoro olefins can be exemplarily selected from any one of 1H,1H,2H-perfluoro-1-hexene (CF3(CF2)3CH=CH2), 1H-perfluorobut-1-ene (CF3CF2CFH=CF2), octafluorocyclopentene (C5F8), perfluorohept-1-ene (CF3(CF2)4CF=CF2), perfluoro(2-methyl-2-pentene) (hexafluoropropylene dimer: CF3CF2-CF=C(CF3)2), perfluorohex-1-ene (CF3-(CF2)3-CF=CF2), dodecafluoro-1,9-decadiene (CH2=CH-(CF2)6-CH=CH2) and 6H-perfluoro-1-hexene (CF2H-(CF2)3-CF=CF2).

[0075] The selection of the above-mentioned perfluoro- or polyfluoro-olefins is conducive to obtaining azeotropes or azeotrope-like compositions with lower boiling points, higher thermal conductivity and better insulation properties.

[0076] In an optional embodiment, the fluorinated liquid composition is composed of a perfluoro or polyfluoro ester and a perfluoro or polyfluoro alkene, or the fluorinated liquid composition is composed of a perfluoro or polyfluoro ester, a perfluoro or polyfluoro alkane and a perfluoro or polyfluoro alkene; wherein, based on the total mass of the fluorinated liquid composition being 100%, the mass of the perfluoro or polyfluoro ester is 25%-80%, for example, 67.57%-75.76%, 66.67%-80.00%, 50.25%-59.88% or 26.81%-41.66%.

[0077] For example, the fluorinated liquid composition comprises hexafluoroisopropyl acetate and perfluoro(2-methyl-2-pentene), wherein the mass of hexafluoroisopropyl acetate may be 67.57%-75.76% and the mass of perfluoro(2-methyl-2-pentene) may be 24.24%-32.43%. Alternatively, the fluorinated liquid composition comprises methyl pentafluoropropionate and perfluorohex-1-ene, wherein the mass of methyl pentafluoropropionate may be 66.67%-80.00% and the mass of perfluorohex-1-ene may be 20.00%-33.33%. Alternatively, the fluorinated liquid composition comprises hexafluoroisopropyl acetate, perfluoro-2-methylpentane, and perfluoro(2-methyl-2-pentene), wherein the mass of hexafluoroisopropyl acetate may be 50.25%-59.88%, the mass of perfluoro-2-methylpentane may be 20.36%-25.13%, and the mass of perfluoro(2-methyl-2-pentene) may be 19.76%-24.62%. Alternatively, the fluorinated liquid composition comprises ethyl trifluoroacetate, 1H-perfluoropentane, and perfluoro(2-methyl-2-pentene), wherein the mass of ethyl trifluoroacetate may be 26.81%-41.66%, the mass of 1H-perfluoropentane may be 16.67%-20.91%, and the mass of perfluoro(2-methyl-2-pentene) may be 41.67%-52.28%.

[0078] The selection of the above-mentioned perfluoro or polyfluoro olefin is conducive to obtaining an azeotrope or azeotrope-like composition with a low boiling point, high thermal conductivity and good insulation. In some implementations, the above-mentioned perfluoro or polyfluoro alcohol can be illustratively selected from any one of perfluoro tert-butyl alcohol ((CF3)3C-OH), 2,2,2-trifluoroethanol (CF3-CH2-OH), 2,2,3,3,3-pentafluoro-1-propanol (CF3-CF2-CH2-OH), 1,1,1,3,3,3-hexafluoro-2-methyl-2-propanol (CH3-C(CF3)2-OH), 1,1,1,3,3,3-hexafluoro-2-propanol ((CF3)2CH-OH) and 2,2,3,3,4,4,4-heptafluoro-1-butanol (CF3CF2CF2CH2-OH).

[0079] The selection of the above-mentioned perfluoro or polyfluoro alcohol is conducive to obtaining an azeotrope or azeotrope-like composition with a low boiling point, high thermal conductivity and good insulation.

[0080] In an optional embodiment, the fluorinated liquid composition is composed of a perfluoro or polyfluoro ester and a perfluoro or polyfluoro alcohol, or the fluorinated liquid composition is composed of a perfluoro or polyfluoro ester, a perfluoro or polyfluoro alkane and a perfluoro or polyfluoro alcohol; or the fluorinated liquid composition is composed of a perfluoro or polyfluoro ester, a perfluoro or polyfluoro olefin and a perfluoro or polyfluoro alcohol, wherein the mass of the perfluoro or polyfluoro ester is 40%-75% based on the total mass of the fluorinated liquid composition as 100%, for example, it can be 42.74%-51.55%, 56.18%-71.43%, 40.65%-52.63% or 44.66%-58.8%.

[0081] For example, the fluorinated liquid composition comprises hexafluoroisopropyl acetate and perfluoro-tert-butyl alcohol, wherein the mass of hexafluoroisopropyl acetate may be 42.74%-51.55% and the mass of perfluoro-tert-butyl alcohol may be 48.45%-57.26%. Alternatively, the fluorinated liquid composition comprises methyl trifluoroacetate and perfluoro-tert-butyl alcohol, wherein the mass of methyl trifluoroacetate may be 56.18%-71.43% and the mass of perfluoro-tert-butyl alcohol may be 28.57%-43.82%. Alternatively, the fluorinated liquid composition comprises hexafluoroisopropyl acetate, perfluoro-2-methylpentane, and perfluoro-tert-butyl alcohol, wherein the mass of hexafluoroisopropyl acetate may be 40.65%-52.63%, the mass of perfluoro-2-methylpentane may be 13.16%-16.67%, and the mass of perfluoro-tert-butyl alcohol may be 34.21%-42.68%. Alternatively, the fluorinated liquid composition consists of hexafluoroisopropyl acetate, perfluoro(2-methyl-2-pentene) and perfluoro-tert-butanol, wherein the mass of hexafluoroisopropyl acetate can be 44.66%-58.8%, the mass of perfluoro(2-methyl-2-pentene) can be 11.77%-16.70%, and the mass of perfluoro-tert-butanol can be 29.43%-38.64%.

[0082] By selecting the above substances to form a fluorinated liquid composition, an azeotrope or azeotrope-like composition with a low boiling point, high thermal conductivity and good insulation can be obtained.

[0083] In some implementations, the perfluoro or polyfluoro ether may be exemplarily selected from perfluorobutyl methyl ether (CF3(CF2)3-O-CH3), perfluoroisobutyl methyl ether (CF(CF3)2-CF2-O-CH3), bis(2,2,2-trifluoroethyl) ether (CF3CH2-O-CH2-CF3), fluoromethyl-1,1,1,3,3,3-hexafluoroisopropyl ether ((CF3)2-CH-O-CH2F), 2,2,2-trifluoroethyl methyl ether (CF3CH2-O-CH3), 2,2,3,3,3-pentafluoropropyl methyl ether (CF3CF2CH2-O- CH3), heptafluoropropyl 1,2,2,2-tetrafluoroethyl ether (CF3CF2CF2-O-CFH-CF3), difluoromethyl 2,2,3,3-tetrafluoropropyl ether (CF2H-CF2-CH2-O-CF2H), heptafluoroisopropyl methyl ether ((CF3)2CFH-O-CH3), bis-(1,2,2,2-tetrafluoroethyl) ether (CF3-CFH-O-CFH-CF3), 1,1,2,2-tetrafluoroethyl ethyl ether (CF2H-CF2-O-CH2CH3), ethyl 1,1,2,3,3,3-hexafluoropropyl ether (CF3-CFH-CF 2- O-CH2CH3), methyl 2,2,3,3,3-pentafluoropropyl ether (CF3CF2CH2-O-CH3), allyl heptafluoroisopropyl ether ((CF3)2-CFH-O-CH2CH=CH2), 1,1,2,2-tetrafluoroethyl 2,2,3,3-tetrafluoropropyl ether (CF2H-CF2-O-CH2-CF2-CF2H), 1,1,2,3,3,3-hexafluoropropyl methyl ether (CF3-CHF-CF2-O-CH3) and 1,1,2,2-tetrafluoroethyl methyl ether (CF2H-CF2-O-CH3).

[0084] The selection of the above-mentioned perfluoro or polyfluoro ether is conducive to obtaining an azeotrope or azeotrope-like composition with a low boiling point, high thermal conductivity and good insulation.

[0085] In an optional embodiment, the fluorinated liquid composition is composed of perfluoro or polyfluoro ester and perfluoro or polyfluoro ether, or the fluorinated liquid composition is composed of perfluoro or polyfluoro ester, perfluoro or polyfluoro alkane and perfluoro or polyfluoro ether; or the fluorinated liquid composition is composed of perfluoro or polyfluoro ester, perfluoro or polyfluoro olefin and perfluoro or polyfluoro ether; or the fluorinated liquid composition is composed of perfluoro or polyfluoro ester, perfluoro or polyfluoro alcohol and perfluoro or polyfluoro ether, wherein the mass of the perfluoro or polyfluoro ester is 40%-70% based on the total mass of the fluorinated liquid composition as 100%, for example, it can be 51.55%-69.44%, 56.18%-67.57%, 36.37%-48.79% or 42.92%-56.5%.

[0086] For example, the fluorinated liquid composition comprises hexafluoroisopropyl acetate and fluoromethyl-1,1,1,3,3,3-hexafluoroisopropyl ether, wherein the mass of hexafluoroisopropyl acetate may be 51.55%-69.44% and the mass of fluoromethyl-1,1,1,3,3,3-hexafluoroisopropyl ether may be 30.56%-48.45%. Alternatively, the fluorinated liquid composition comprises methyl trifluoroacetate and 1,1,2,3,3,3-hexafluoropropyl methyl ether, wherein the mass of methyl trifluoroacetate may be 56.18%-67.57% and the mass of 1,1,2,3,3,3-hexafluoropropyl methyl ether may be 32.43%-43.82%. Alternatively, the fluorinated liquid composition consists of hexafluoroisopropyl acetate, perfluoro-2-methylpentane and methyl 2,2,3,3,3-pentafluoropropyl ether, wherein the mass of hexafluoroisopropyl acetate can be 36.37%-48.79%, the mass of perfluoro-2-methylpentane can be 14.63%-18.18%, and the mass of methyl 2,2,3,3,3-pentafluoropropyl ether can be 36.58%-45.45%. Alternatively, the fluorinated liquid composition consists of hexafluoroisopropyl acetate, perfluoro(2-methyl-2-pentene) and methyl 2,2,3,3,3-pentafluoropropyl ether, wherein the mass of hexafluoroisopropyl acetate can be 42.92%-61.35%, the mass of perfluoro(2-methyl-2-pentene) can be 27.61%-40.77%, and the mass of 2,2,3,3,3-pentafluoropropyl methyl ether can be 11.04%-16.31%. Alternatively, the fluorinated liquid composition consists of ethyl trifluoroacetate, 1,1,1,3,3,3-hexafluoro-2-propanol and heptafluoropropyl 1,2,2,2-tetrafluoroethyl ether, wherein the mass of ethyl trifluoroacetate can be 42.92%-56.5%, the mass of 1,1,1,3,3,3-hexafluoro-2-propanol can be 12.43%-16.31%, and the mass of heptafluoropropyl 1,2,2,2-tetrafluoroethyl ether can be 31.07%-40.77%.

[0087] By selecting the above substances to form a fluorinated liquid composition, an azeotrope or azeotrope-like composition with a low boiling point, high thermal conductivity and good insulation can be obtained.

[0088] In some implementations, the perfluoro or polyfluoroketone can be exemplarily selected from methyl perfluorobutyl ketone (CF3-(CF2)3-CO-CH3), 3H-perfluoropentane-2,4-dione (CF3-CO-CHF-CO-CF3), 1,1,1,2,2,4,5,5,5-nonafluoro-4-(trifluoromethyl)-3-pentanone ((CF 3)2-CF-CO-CF2CF3), methyl pentafluoroethyl ketone (CF3CF2-CO-CH3), methyl heptafluoropropyl ketone (CF3CF2CF2-CO-CH3) and methyl pentafluoroheptyl ketone (CF3(CF2)6-CO-CH3).

[0089] The selection of the above-mentioned perfluoro or polyfluoroketone is conducive to obtaining an azeotrope or azeotrope-like composition with a low boiling point, high thermal conductivity and good insulation.

[0090] In an optional embodiment, the fluorinated liquid composition is composed of a perfluoro or polyfluoro ester and a perfluoro or polyfluoro ketone, or the fluorinated liquid composition is composed of a perfluoro or polyfluoro ester, a perfluoro or polyfluoro alkane and a perfluoro or polyfluoro ketone; or the fluorinated liquid composition is composed of a perfluoro or polyfluoro ester, a perfluoro or polyfluoro olefin and a perfluoro or polyfluoro ketone; or the fluorinated liquid composition is composed of a perfluoro or polyfluoro ester, a perfluoro or polyfluoro alcohol and a perfluoro or polyfluoro ketone; or the fluorinated liquid composition is composed of a perfluoro or polyfluoro ester, a perfluoro or polyfluoro alcohol and a perfluoro or polyfluoro ketone; or polyfluoroether and perfluoro or polyfluoroketone, wherein the mass of the perfluoro or polyfluoroester is 27%-80% based on the total mass of the fluorinated liquid composition as 100%, for example, it can be 54.95%-65.79%, 57.41%-78.13%, 27.49%-52.35%, 42.92%-70.42%, 38.32%-67.12%, or 39.69%-53.19%.

[0091] For example, the fluorinated liquid composition comprises hexafluoroisopropyl acetate and 1,1,1,2,2,4,5,5,5-nonafluoro-4-(trifluoromethyl)-3-pentanone, wherein the mass of hexafluoroisopropyl acetate may be 54.95%-65.79% and the mass of 1,1,1,2,2,4,5,5,5-nonafluoro-4-(trifluoromethyl)-3-pentanone may be 34.21%-45.05%. Alternatively, the fluorinated liquid composition comprises methyl trifluoroacetate and perfluorohexanone, wherein the mass of methyl trifluoroacetate may be 57.41%-78.13% and the mass of perfluorohexanone may be 21.87%-42.59%. Alternatively, the fluorinated liquid composition comprises hexafluoroisopropyl acetate, 2H,3H-decafluoropentane, and perfluorohexanone, wherein the mass of hexafluoroisopropyl acetate may be 27.49%-52.35%, the mass of 2H,3H-decafluoropentane may be 19.05%-31.9%, and the mass of perfluorohexanone may be 28.60%-40.61%. Alternatively, the fluorinated liquid composition comprises 2,2,2-trifluoroethyl formate, perfluorohex-1-ene, and methyl pentafluoroheptyl ketone, wherein the mass of 2,2,2-trifluoroethyl formate may be 42.92%-70.42%, the mass of perfluorohex-1-ene may be 7.75%-15.88%, and the mass of methyl pentafluoroheptyl ketone may be 21.83%-41.20%. Alternatively, the fluorinated liquid composition comprises methyl trifluoroacetate, perfluoro-tert-butyl alcohol, and methyl pentafluoroethyl ketone, wherein the mass of methyl trifluoroacetate may be 38.32%-67.12%, the mass of perfluoro-tert-butyl alcohol may be 23.49%-44.06%, and the mass of methyl pentafluoroethyl ketone may be 9.39%-17.62%. Alternatively, the fluorinated liquid composition comprises hexafluoroisopropyl acetate, heptafluoroisopropyl methyl ether, and methyl pentafluoroheptyl ketone, wherein the mass of hexafluoroisopropyl acetate may be 39.69%-53.19%, the mass of heptafluoroisopropyl methyl ether may be 17.55%-22.62%, and the mass of methyl pentafluoroheptyl ketone may be 29.26%-37.69%.

[0092] By selecting the above substances to form a fluorinated liquid composition, an azeotrope or azeotrope-like composition with a low boiling point, high thermal conductivity and good insulation can be obtained.

[0093] As mentioned above, the thermal conductivity of the currently available fluorinated liquid products is generally less than 0.08W / (m·k). The thermal conductivity coefficient of the fluorinated liquid composition provided by the present disclosure is ≥0.08W / (m·K), and the insulation performance is good, which improves the overall low thermal conductivity of the common fluorinated liquids on the market and expands the variety of immersion cooling fluids. In addition, the present disclosure selects fluorinated esters and other fluorinated organic liquid compounds with different physical properties for mixing to obtain azeotropes or azeotrope-like compositions, and can well adjust the boiling point of the fluorinated liquid-immersion cooling fluid. Under standard atmospheric pressure conditions, the boiling point range is 30°C-80°C. For reference, the preparation process of the above-mentioned fluorinated liquid composition adopts the method of continuous temperature tracking and recording to quickly find the azeotropic point of the binary or ternary mixture. For binary azeotropes or azeotrope-like compositions, a three-necked flask is used, one port of which is connected to a condensing reflux device, one port to a pulse drip pump, and one port to a temperature recorder. The system is placed in an external constant temperature system, the temperature of which is greater than the boiling point of any of the binary components. The temperature curve of the fluorinated liquid composition is monitored. When the temperature is lower than the boiling point of any of the binary components, the pulse dripping is stopped. The resulting composition is an azeotrope or azeotrope-like composition. For ternary azeotropes or azeotrope-like compositions, a four-necked flask is used, one port of which is connected to a condensing reflux device, one port to a temperature recorder, and the other two ports to two pulse drip pumps. The system is placed in an external constant temperature system, the temperature of which is greater than the boiling point of any of the ternary components. The temperature curve of the fluorinated liquid composition is monitored. When the temperature is lower than the boiling point of any of the ternary components, the pulse dripping is stopped. The resulting composition is an azeotrope or azeotrope-like composition.

[0094] Accordingly, the present disclosure also provides the use of the above-mentioned fluorinated liquid composition in preparing a cooling medium. The cooling medium can be, for example, an immersion cooling medium, such as a cooling liquid.

[0095] For reference, the fluorinated liquid composition provided in the present disclosure can be biphasic when used as an immersion cooling medium. It has a high latent heat of vaporization and can quickly and efficiently remove heat from the heat source during the evaporation and vaporization process, resulting in excellent heat dissipation and cooling effects.

[0096] As shown in FIG1 , the fluorinated liquid composition can be added to a closed system of a server, where it absorbs heat through vaporization phase change, removing the heat generated during the operation of the server. The vaporized fluorinated liquid gas contacts the heat exchange system and is reliquefied and flows back into the cooling system of the server.

[0097] The above-mentioned cooling medium can be used in the liquid cooling system of electronic equipment, for example. The liquid cooling system of electronic equipment may include, for example, a chip cooling system, a server cooling system, a supercomputing data center cooling system, or a new energy vehicle thermal management system.

[0098] In addition, the present disclosure also provides a liquid cooling system, which includes an electronic device and a liquid cooling medium prepared from the above-mentioned fluorinated liquid composition. The electronic device can be immersed in the liquid cooling medium for example.

[0099] The features and performance of the present disclosure are further described in detail below with reference to the embodiments.

[0100] Example 1

[0101] This embodiment provides a fluorinated liquid composition, which is a binary fluorinated liquid organic compound composed of a perfluoro or polyfluoro ester and a perfluoro or polyfluoro alkane.

[0102] Specifically, this embodiment uses hexafluoroisopropyl acetate (CH3-CO-O-CH(CF3)2) and perfluoro-2-methylpentane (CF3CF2CF2CF-(CF3)2) to mix an azeotrope or an azeotrope-like composition.

[0103] 100 g of hexafluoroisopropyl acetate was weighed and placed in a three-necked flask. The outside of the three-necked flask was heated in a water bath at 80°C. One of the three ports of the three-necked flask was connected to a condenser reflux tube, one to a metering dropperistaltic pump, and one to a multi-channel temperature monitor. A tetrafluoroethylene magnet was added to the flask to magnetically stir the liquid in the three-necked flask, forming a boiling point test device. Perfluoro-2-methylpentane was slowly added dropwise in a pulsed manner using a metering dropperistaltic pump (for example, setting a 1-minute dropper time, then stopping for 10 minutes, and then adding the liquid again for 1 minute). The temperature change of the mixed liquid in the three-necked flask was monitored by the multi-channel temperature monitor to determine whether the mixed liquid reached an azeotropic or azeotropic-like state.

[0104] When the mass fraction of hexafluoroisopropyl acetate in the mixed liquid is 60.24%-75.19% and the mass fraction of perfluoro-2-methylpentane in the mixed liquid is 24.81%-39.76%, the boiling point temperature measurement values ​​in Table 1 indicate that, within a certain range, the mixed liquid has formed an azeotrope or azeotrope-like composition with the lowest boiling point.

[0105] Table 1 Boiling point temperature measurement values

[0106] A mixture containing 60.24% to 75.19% hexafluoroisopropyl acetate and 24.81% to 39.76% perfluoro-2-methylpentane was measured for thermal conductivity (maximum value: 0.115 W / m·K) and dielectric constant (maximum value: 3.9245), and the data were recorded.

[0107] Example 2

[0108] This embodiment provides a fluorinated liquid composition, which is a binary fluorinated liquid organic compound composed of a perfluoro or polyfluoro ester and a perfluoro or polyfluoro alkane.

[0109] Specifically, this embodiment adopts the scheme of hexafluoroisopropyl acetate (CH3-CO-O-CH(CF3)2) and 2H,3H-decafluoropentane (CF3CHFCHFCF2CF3) to mix the azeotrope or azeotrope-like composition.

[0110] The same method as in Example 1 was used to determine whether the mixed solution had reached an azeotropic or azeotrope-like state. When the mass fraction of hexafluoroisopropyl acetate in the mixed solution was 47.62% to 62.50% and the mass fraction of 2H,3H-decafluoropentane in the mixed solution was 37.5% to 52.38%, the boiling point temperature measurements in Table 2 indicated that, within a certain range, the mixed solution had formed an azeotrope or azeotrope-like composition with the lowest boiling point.

[0111] Table 2 Boiling point temperature measurement values

[0112] A mixture containing 47.62% to 62.50% hexafluoroisopropyl acetate and 37.5% to 52.38% 2H,3H-decafluoropentane by mass was measured for thermal conductivity (maximum value: 0.097 W / m·K) and dielectric constant (maximum value: 3.7734), and the data were recorded.

[0113] Example 3

[0114] This embodiment provides a fluorinated liquid composition, which is a binary fluorinated liquid organic compound composed of a perfluoro or polyfluoro ester and a perfluoro or polyfluoro olefin.

[0115] Specifically, this embodiment uses hexafluoroisopropyl acetate (CH3-CO-O-CH(CF3)2) and perfluoro(2-methyl-2-pentene) (hexafluoropropylene dimer: CF3CF2-CF=C(CF3)2) to mix the azeotrope or azeotrope-like composition.

[0116] The same method as in Example 1 was used to determine whether the mixed solution had reached an azeotropic or azeotrope-like state. When the mass fraction of hexafluoroisopropyl acetate accounted for 67.57%-75.76% of the mass fraction of the mixed solution and the mass fraction of perfluoro(2-methyl-2-pentene) accounted for 24.24%-32.43% of the mass fraction of the mixed solution, the boiling point temperature measurements in Table 3 indicated that, within a certain range, the mixed solution had formed an azeotrope or azeotrope-like composition with the lowest boiling point.

[0117] Table 3 Boiling point temperature measurement values

[0118] A mixture in which the mass of hexafluoroisopropyl acetate accounts for 67.57% to 75.76% of the mass fraction of the mixed solution and the mass of perfluoro(2-methyl-2-pentene) accounts for 24.24% to 32.43% of the mass fraction of the mixed solution is prepared. The thermal conductivity (maximum value: 0.107 W / m·K) and dielectric constant of the mixed solution are measured and recorded (maximum value: 2.9237).

[0119] Example 4

[0120] This embodiment provides a fluorinated liquid composition, which is a binary fluorinated liquid organic compound composed of a perfluoro or polyfluoro ester and a perfluoro or polyfluoro olefin.

[0121] Specifically, this embodiment uses methyl pentafluoropropionate (CF3-CF2-CO-O-CH3) and perfluorohex-1-ene (CF3-CF2CF2CF2-CF=CF2) to form an azeotrope or an azeotrope-like composition.

[0122] The same method as in Example 1 was used to determine whether the mixed solution had reached an azeotropic or azeotrope-like state. When the mass fraction of methyl pentafluoropropionate in the mixed solution was 66.67% to 80.00% and the mass fraction of perfluorohex-1-ene in the mixed solution was 20.00% to 33.33%, the boiling point temperature measurements in Table 4 indicated that, within a certain range, the mixed solution had formed an azeotrope or azeotrope-like composition with the lowest boiling point.

[0123] Table 4 Boiling point temperature measurement values

[0124] A mixture in which the mass fraction of methyl pentafluoropropionate accounts for 66.67% to 80.00% by mass of the mixture and the mass fraction of perfluorohex-1-ene accounts for 20.00% to 33.33% by mass of the mixture was prepared. The thermal conductivity (maximum value: 0.117 W / m·K) and dielectric constant of the mixture were measured and recorded (maximum value: 2.7769).

[0125] Example 5

[0126] This embodiment provides a fluorinated liquid composition, which is a ternary fluorinated liquid organic compound consisting of a perfluoro or polyfluoro ester, a perfluoro or polyfluoro alkane, and a perfluoro or polyfluoro olefin.

[0127] Specifically, this embodiment uses hexafluoroisopropyl acetate (CH3-CO-O-CH(CF3)2), perfluoro-2-methylpentane (CF3CF2CF2CF-(CF3)2) and perfluoro(2-methyl-2-pentene) (hexafluoropropylene dimer: CF3CF2-CF=C(CF3)2) to mix the azeotrope or azeotrope-like composition.

[0128] 100 g of hexafluoroisopropyl acetate was weighed and placed in a four-necked flask. The outside of the four-necked flask was heated in a water bath at 80°C. One of the four ports of the four-necked flask was connected to a condenser reflux tube, two of which were connected to two metering dropperistaltic pumps, and the last port was connected to a multi-channel temperature monitor. A tetrafluoroethylene magnet was added to the flask to magnetically stir the liquid in the four-necked flask to form a boiling point test device. Perfluoro-2-methylpentane and perfluoro(2-methyl-2-pentene) liquids were slowly added dropwise in a pulsed manner using a metering dropperistaltic pump (for example, setting a time of 1 minute to add liquid, then stopping for 10 minutes, and then adding liquid again for 1 minute). The temperature change of the mixed liquid in the three-necked flask was monitored by a multi-channel temperature monitor to determine whether the mixed liquid reached an azeotropic or azeotropic-like state. When the mass fraction of hexafluoroisopropyl acetate, the mass fraction of perfluoro-2-methylpentane, and the mass fraction of perfluoro(2-methyl-2-pentene) in the mixed liquid is 50.25%-59.88% by mass, and the mass fraction of perfluoro(2-methyl-2-pentene) in the mixed liquid is 20.36%-25.13% by mass, respectively, the boiling point temperature measurements in Table 5 indicate that, within a certain range, the mixed liquid has formed an azeotrope or azeotrope-like composition with the lowest boiling point.

[0129] Table 5 Boiling point temperature measurement values

[0130] A mixture in which the mass of hexafluoroisopropyl acetate accounts for 50.25% to 59.88% of the mass fraction of the mixed solution, the mass of perfluoro-2-methylpentane accounts for 20.36% to 25.13% of the mass fraction of the mixed solution, and the mass of perfluoro(2-methyl-2-pentene) accounts for 19.76% to 24.62% of the mass fraction of the mixed solution is taken. The thermal conductivity (maximum value: 0.101 W / m·K) and dielectric constant of the mixed solution are measured and the data (maximum value: 3.1768) are recorded.

[0131] Example 6

[0132] This embodiment provides a fluorinated liquid composition, which is a ternary fluorinated liquid organic compound consisting of a perfluoro or polyfluoro ester, a perfluoro or polyfluoro alkane, and a perfluoro or polyfluoro olefin.

[0133] Specifically, this embodiment adopts the scheme of ethyl trifluoroacetate (CF3-CO-O-CH2CH3), 1H-perfluoropentane (CF3(CF2)3CHF2) and perfluoro(2-methyl-2-pentene) (hexafluoropropylene dimer: CF3CF2-CF=C(CF3)2) to mix the azeotrope or azeotrope-like composition.

[0134] The same method as in Example 5 was used to determine whether the mixed solution had reached an azeotropic or azeotrope-like state. When the mass fraction of ethyl trifluoroacetate, the mass fraction of 1H-perfluoropentane, and the mass fraction of perfluoro(2-methyl-2-pentene) in the mixed solution was 26.81%-41.66% by mass, 1H-perfluoropentane, and 41.67%-52.28% by mass, the boiling point temperature measurements in Table 6 indicate that, within a certain range, the mixed solution has formed an azeotrope or azeotrope-like composition with the lowest boiling point.

[0135] Table 6 Boiling point temperature measurement values

[0136] A mixture in which the mass of ethyl trifluoroacetate accounts for 26.81% to 41.66% of the mass fraction of the mixed liquid, the mass of 1H-perfluoropentane accounts for 16.67% to 20.91% of the mass fraction of the mixed liquid, and the mass of perfluoro(2-methyl-2-pentene) accounts for 41.67% to 52.28% of the mass fraction of the mixed liquid is taken, and the thermal conductivity (maximum value: 0.080 W / mk) and dielectric constant of the mixed liquid are measured and the data (maximum value: 2.4738) are recorded.

[0137] Example 7

[0138] This embodiment provides a fluorinated liquid composition, which is a binary fluorinated liquid organic compound composed of a perfluoro or polyfluoro ester and a perfluoro or polyfluoro alcohol.

[0139] Specifically, this embodiment adopts the scheme of hexafluoroisopropyl acetate (CH3-CO-O-CH(CF3)2) and perfluorotert-butyl alcohol ((CF3)3C-OH) to mix the azeotrope or azeotrope-like composition.

[0140] The same method as in Example 1 was used to determine whether the mixed solution had reached an azeotropic or azeotrope-like state. When the mass fraction of hexafluoroisopropyl acetate and the mass fraction of perfluorotert-butyl alcohol in the mixed solution were 42.74% to 51.55% and 48.45% to 57.26% respectively, the boiling point temperature measurements in Table 7 indicate that, within a certain range, the mixed solution had formed an azeotrope or azeotrope-like composition with the lowest boiling point.

[0141] Table 7 Boiling point temperature measurement values

[0142] A mixture in which the mass fraction of hexafluoroisopropyl acetate accounts for 42.74% to 51.55% of the mass fraction of the mixed solution and the mass fraction of perfluorotert-butyl alcohol accounts for 48.45% to 57.26% of the mass fraction of the mixed solution is measured, and the thermal conductivity (maximum value: 0.117 W / m·K) and dielectric constant of the mixed solution are measured and recorded (maximum value: 3.6237).

[0143] Example 8

[0144] This embodiment provides a fluorinated liquid composition, which is a binary fluorinated liquid organic compound composed of a perfluoro or polyfluoro ester and a perfluoro or polyfluoro alcohol.

[0145] Specifically, this embodiment adopts the scheme of methyl trifluoroacetate (CF3-CO-O-CH3) and perfluorotert-butyl alcohol ((CF3)3C-OH) to mix the azeotrope or azeotrope-like composition.

[0146] The same method as in Example 1 was used to determine whether the mixed solution had reached an azeotropic or azeotrope-like state. When the mass fraction of methyl trifluoroacetate in the mixed solution was 56.18%-71.43% and the mass fraction of perfluorotert-butyl alcohol in the mixed solution was 28.57%-43.82%, the boiling point temperature measurements in Table 8 indicated that, within a certain range, the mixed solution had formed an azeotrope or azeotrope-like composition with the lowest boiling point.

[0147] Table 8 Boiling point temperature measurement values

[0148] A mixture in which the mass fraction of methyl trifluoroacetate accounts for 56.18%-71.43% of the mass fraction of the mixed solution and the mass fraction of perfluorotert-butyl alcohol accounts for 28.57%-43.82% of the mass fraction of the mixed solution is measured, and the thermal conductivity (maximum value: 0.122 W / m·K) and dielectric constant of the mixture are measured and recorded (maximum value: 4.3235).

[0149] Example 9

[0150] This embodiment provides a fluorinated liquid composition, which is a ternary fluorinated liquid organic compound consisting of a perfluoro or polyfluoro ester, a perfluoro or polyfluoro alkane, and a perfluoro or polyfluoro alcohol.

[0151] Specifically, this embodiment uses hexafluoroisopropyl acetate (CH3-CO-O-CH(CF3)2), perfluoro-2-methylpentane (CF3-CF2-CF2CF(CF3)2) and perfluorotert-butyl alcohol ((CF3)3C-OH) to mix the azeotrope or azeotrope-like composition.

[0152] The same method as in Example 5 was used to determine whether the mixed solution had reached an azeotropic or azeotrope-like state. When the mass fraction of hexafluoroisopropyl acetate, the mass fraction of perfluoro-2-methylpentane, and the mass fraction of perfluoro-tert-butyl alcohol in the mixed solution was 40.65%-52.63%, 13.16%-16.67%, and 34.21%-42.68%, the boiling point temperature measurements in Table 9 indicate that, within a certain range, the mixed solution has formed an azeotrope or azeotrope-like composition with the lowest boiling point.

[0153] Table 9 Boiling point temperature measurement values

[0154] A mixture in which the mass fraction of hexafluoroisopropyl acetate accounts for 40.65% to 52.63% of the mass fraction of the mixed solution, the mass fraction of perfluoro-2-methylpentane accounts for 13.16% to 16.67% of the mass fraction of the mixed solution, and the mass fraction of perfluorotert-butyl alcohol accounts for 34.21% to 42.68% of the mass fraction of the mixed solution is measured. The thermal conductivity (maximum value: 0.128 W / m·K) and dielectric constant of the mixed solution are measured and the data are recorded (maximum value: 3.2736).

[0155] Example 10

[0156] This embodiment provides a fluorinated liquid composition, which is a binary fluorinated liquid organic substance composed of a perfluoro or polyfluoro ester and a perfluoro or polyfluoro ether.

[0157] Specifically, this embodiment adopts the scheme of hexafluoroisopropyl acetate (CH3-CO-O-CH(CF3)2) and fluoromethyl-1,1,1,3,3,3-hexafluoroisopropyl ether ((CF3)2CH-O-CH2F) to mix the azeotrope or azeotrope-like composition.

[0158] The same method as in Example 1 was used to determine whether the mixed solution had reached an azeotropic or azeotrope-like state. When the mass fraction of hexafluoroisopropyl acetate was 51.55% to 69.44% of the mixed solution, and the mass fraction of fluoromethyl-1,1,1,3,3,3-hexafluoroisopropyl ether was 30.56% to 48.45% of the mixed solution, the boiling point temperature measurements in Table 10 indicated that, within a certain range, the mixed solution had formed an azeotrope or azeotrope-like composition with the lowest boiling point.

[0159] Table 10 Boiling point temperature measurement values

[0160] A mixture in which the mass of hexafluoroisopropyl acetate accounts for 51.55%-69.44% of the mass fraction of the mixed solution and the mass of fluoromethyl-1,1,1,3,3,3-hexafluoroisopropyl ether accounts for 30.56%-48.45% of the mass fraction of the mixed solution is measured. The thermal conductivity (maximum value: 0.115 W / m·K) and dielectric constant (maximum value: 3.2234) of the mixed solution are measured and recorded.

[0161] Example 11

[0162] This embodiment provides a fluorinated liquid composition, which is a binary fluorinated liquid organic substance composed of a perfluoro or polyfluoro ester and a perfluoro or polyfluoro ether.

[0163] Specifically, this embodiment adopts the scheme of methyl trifluoroacetate (CF3-CO-O-CH3) and 1,1,2,3,3,3-hexafluoropropyl methyl ether (CF3-CHF-CF2-O-CH3) to mix the azeotrope or azeotrope-like composition.

[0164] The same method as in Example 1 was used to determine whether the mixed solution had reached an azeotropic or azeotrope-like state. When the mass fraction of methyl trifluoroacetate accounted for 56.18%-67.57% of the mass fraction of the mixed solution, and the mass fraction of 1,1,2,3,3,3-hexafluoropropyl methyl ether accounted for 32.43%-43.82% of the mass fraction of the mixed solution, the boiling point temperature measurements in Table 11 indicate that, within a certain range, the mixed solution has formed an azeotrope or azeotrope-like composition with the lowest boiling point.

[0165] Table 11 Boiling point temperature measurement values

[0166] A mixture in which the mass of methyl trifluoroacetate accounts for 56.18%-67.57% of the mass fraction of the mixture and the mass of 1,1,2,3,3,3-hexafluoropropyl methyl ether accounts for 32.43%-43.82% of the mass fraction of the mixture is taken, and the thermal conductivity (maximum value: 0.112 W / mk) and dielectric constant of the mixture are measured and the data (maximum value: 4.1150) are recorded.

[0167] Example 12

[0168] This embodiment provides a fluorinated liquid composition, which is a ternary fluorinated liquid organic compound consisting of a perfluoro or polyfluoro ester, a perfluoro or polyfluoro alkane, and a perfluoro or polyfluoro ether.

[0169] Specifically, this embodiment adopts the scheme of hexafluoroisopropyl acetate (CH3-CO-O-CH(CF3)2), perfluoro-2-methylpentane (CF3-CF2-CF2CF(CF3)2) and methyl 2,2,3,3,3-pentafluoropropyl ether (CF3CF2CH2-O-CH3) to mix the azeotrope or azeotrope-like composition.

[0170] The same method as in Example 5 was used to determine whether the mixed solution had reached an azeotropic or azeotrope-like state. When the mass fraction of hexafluoroisopropyl acetate, the mass fraction of perfluoro-2-methylpentane, and the mass fraction of methyl 2,2,3,3,3-pentafluoropropyl ether in the mixed solution was 36.37%-48.79%, 14.63%-18.18%, and 36.58%-45.45%, the boiling point temperature measurements in Table 12 indicate that, within a certain range, the mixed solution has formed an azeotrope or azeotrope-like composition with the lowest boiling point.

[0171] Table 12 Boiling point temperature measurement values

[0172] A mixture in which the mass of hexafluoroisopropyl acetate accounts for 36.37%-48.79% of the mass fraction of the mixed liquid, the mass of perfluoro-2-methylpentane accounts for 14.63%-18.18% of the mass fraction of the mixed liquid, and the mass of methyl 2,2,3,3,3-pentafluoropropyl ether accounts for 36.58%-45.45% of the mass fraction of the mixed liquid is taken, and the thermal conductivity (maximum value: 0.125 W / mk) and dielectric constant of the mixed liquid are measured and the data (maximum value: 2.7735) are recorded.

[0173] Example 13

[0174] This embodiment provides a fluorinated liquid composition, which is a binary fluorinated liquid organic substance composed of a perfluoro or polyfluoro ester and a perfluoro or polyfluoro ketone.

[0175] Specifically, this embodiment uses hexafluoroisopropyl acetate (CH3-CO-O-CH(CF3)2) and 1,1,1,2,2,4,5,5,5-nonafluoro-4-(trifluoromethyl)-3-pentanone (i.e., perfluorohexanone, (CF3)2-CF-CO-CF2CF3) to mix the azeotrope or azeotrope-like composition.

[0176] The same method as in Example 1 was used to determine whether the mixed solution had reached an azeotropic or azeotrope-like state. When the mass fraction of hexafluoroisopropyl acetate was 54.95%-65.79% of the mixed solution, and the mass fraction of 1,1,1,2,2,4,5,5,5-nonafluoro-4-(trifluoromethyl)-3-pentanone was 34.21%-45.05% of the mixed solution, the boiling point temperature measurements in Table 13 indicated that, within a certain range, the mixed solution had formed an azeotrope or azeotrope-like composition with the lowest boiling point.

[0177] Table 13 Boiling point temperature measurement values

[0178] A mixture in which the mass of hexafluoroisopropyl acetate accounts for 54.95% to 65.79% of the mass fraction of the mixed solution and the mass of 1,1,1,2,2,4,5,5,5-nonafluoro-4-(trifluoromethyl)-3-pentanone accounts for 34.21% to 45.05% of the mass fraction of the mixed solution is taken. The thermal conductivity (maximum value: 0.111 W / m·K) and dielectric constant of the mixed solution are measured and recorded (maximum value: 2.8234).

[0179] Example 14

[0180] This embodiment provides a fluorinated liquid composition, which is a binary fluorinated liquid organic substance composed of a perfluoro or polyfluoro ester and a perfluoro or polyfluoro ketone.

[0181] Specifically, this embodiment uses methyl trifluoroacetate (CF3-CO-O-CH3) and 1,1,1,2,2,4,5,5,5-nonafluoro-4-(trifluoromethyl)-3-pentanone (i.e., perfluorohexanone, (CF3)2-CF-CO-CF2CF3) to mix the azeotrope or azeotrope-like composition.

[0182] The same method as in Example 1 was used to determine whether the mixed solution had reached an azeotropic or azeotrope-like state. When the mass fraction of methyl trifluoroacetate in the mixed solution was 57.41% to 78.13% and the mass fraction of perfluorohexanone in the mixed solution was 21.87% to 42.59%, the boiling point temperature measurements in Table 14 indicated that, within a certain range, the mixed solution had formed an azeotrope or azeotrope-like composition with the lowest boiling point.

[0183] Table 14 Boiling point temperature measurement values

[0184] A mixture in which the mass of methyl trifluoroacetate accounts for 57.41%-78.13% of the mass fraction of the mixed solution and the mass of perfluorohexanone accounts for 21.87%-42.59% of the mass fraction of the mixed solution is taken, and the thermal conductivity (maximum value: 0.101 W / m·K) and dielectric constant of the mixed solution are measured and recorded (maximum value: 2.8238).

[0185] Example 15

[0186] This embodiment provides a fluorinated liquid composition, which is a ternary fluorinated liquid organic compound consisting of a perfluoro or polyfluoro ester, a perfluoro or polyfluoro alkane, and a perfluoro or polyfluoro ketone.

[0187] Specifically, this embodiment uses hexafluoroisopropyl acetate (CH3-CO-O-CH(CF3)2), 2H,3H-decafluoropentane (CF3CHFCHFCF2CF3) and 1,1,1,2,2,4,5,5,5-nonafluoro-4-(trifluoromethyl)-3-pentanone (i.e., perfluorohexanone, (CF3)2-CF-CO-CF2CF3) to mix azeotropes or azeotrope-like compositions.

[0188] The same method as in Example 5 was used to determine whether the mixed solution had reached an azeotropic or azeotrope-like state. When the mass fraction of hexafluoroisopropyl acetate, the mass fraction of 2H,3H-decafluoropentane, and the mass fraction of perfluorohexanone in the mixed solution was 27.49% to 52.35%, 19.05% to 31.9%, and 28.60% to 40.61%, the boiling point temperature measurements in Table 15 indicate that, within a certain range, the mixed solution has formed an azeotrope or azeotrope-like composition with the lowest boiling point.

[0189] Table 15 Boiling point temperature measurement values

[0190] A mixture in which the mass fraction of hexafluoroisopropyl acetate accounts for 27.49%-52.35% of the mixed solution, the mass fraction of 2H,3H-decafluoropentane accounts for 19.05%-31.9% of the mixed solution, and the mass fraction of perfluorohexanone accounts for 28.60%-40.61% of the mixed solution is measured. The thermal conductivity (0.089 W / m·K) and dielectric constant of the mixed solution are measured and the data (4.5735) are recorded.

[0191] Example 16

[0192] This embodiment provides a fluorinated liquid composition, which is a ternary fluorinated liquid organic compound consisting of a perfluoro or polyfluoro ester, a perfluoro or polyfluoro olefin, and a perfluoro or polyfluoro alcohol.

[0193] Specifically, this embodiment uses hexafluoroisopropyl acetate (CH3-CO-O-CH(CF3)2), perfluoro(2-methyl-2-pentene) (hexafluoropropylene dimer: CF3CF2-CF=C(CF3)2) and perfluorotert-butyl alcohol ((CF3)3C-OH) to mix the azeotrope or azeotrope-like composition.

[0194] The same method as in Example 5 was used to determine whether the mixed solution had reached an azeotropic or azeotrope-like state. When the mass fraction of hexafluoroisopropyl acetate, the mass fraction of perfluoro(2-methyl-2-pentene), and the mass fraction of perfluorotert-butyl alcohol accounted for 44.66%-58.8% of the mixed solution, the mass fraction of perfluoro(2-methyl-2-pentene), and the mass fraction of perfluorotert-butyl alcohol accounted for 29.43%-38.64% of the mixed solution, the boiling point temperature measurements in Table 16 indicate that, within a certain range, the mixed solution has formed an azeotrope or azeotrope-like composition with the lowest boiling point.

[0195] Table 16 Boiling point temperature measurement values

[0196] A mixture in which the mass of hexafluoroisopropyl acetate accounts for 44.66% to 58.8% of the mass fraction of the mixed solution, the mass of perfluoro(2-methyl-2-pentene) accounts for 11.77% to 16.70% of the mass fraction of the mixed solution, and the mass of perfluorotert-butyl alcohol accounts for 29.43% to 38.64% of the mass fraction of the mixed solution is measured. The thermal conductivity (maximum value: 0.115 W / m·K) and dielectric constant of the mixed solution are measured and the data are recorded (maximum value: 3.8633).

[0197] Example 17

[0198] This embodiment provides a fluorinated liquid composition, which is a ternary fluorinated liquid organic compound consisting of a perfluoro or polyfluoro ester, a perfluoro or polyfluoro olefin, and a perfluoro or polyfluoro ether.

[0199] Specifically, this embodiment adopts the scheme of hexafluoroisopropyl acetate (CH3-CO-O-CH(CF3)2), perfluoro(2-methyl-2-pentene) (hexafluoropropylene dimer: CF3CF2-CF=C(CF3)2) and methyl 2,2,3,3,3-pentafluoropropyl ether (CF3CF2CH2-O-CH3) to mix the azeotrope or azeotrope-like composition.

[0200] The same method as in Example 5 was used to determine whether the mixed solution had reached an azeotropic or azeotrope-like state. When the mass fraction of hexafluoroisopropyl acetate, the mass fraction of perfluoro(2-methyl-2-pentene), and the mass fraction of 2,2,3,3,3-pentafluoropropyl methyl ether, respectively, accounted for 42.92% to 61.35% of the mixed solution, the mass fraction of perfluoro(2-methyl-2-pentene), and the mass fraction of 2,2,3,3,3-pentafluoropropyl methyl ether, respectively, accounted for 11.04% to 16.31% of the mixed solution, the boiling point temperature measurements in Table 17 indicated that, within a certain range, the mixed solution had formed an azeotrope or azeotrope-like composition with the lowest boiling point.

[0201] Table 17 Boiling point temperature measurement values

[0202] A mixture in which the mass fraction of hexafluoroisopropyl acetate accounts for 42.92% to 61.35% of the mass fraction of the mixture, the mass fraction of perfluoro(2-methyl-2-pentene) accounts for 27.61% to 40.77% of the mass fraction of the mixture, and the mass fraction of 2,2,3,3,3-pentafluoropropyl methyl ether accounts for 11.04% to 16.31% of the mass fraction of the mixture is taken. The thermal conductivity (maximum value: 0.105 W / m·K) and dielectric constant of the mixture are measured and the data are recorded (maximum value: 2.8813).

[0203] Example 18

[0204] This embodiment provides a fluorinated liquid composition, which is a ternary fluorinated liquid organic compound consisting of a perfluoro or polyfluoro ester, a perfluoro or polyfluoro olefin, and a perfluoro or polyfluoro ketone.

[0205] Specifically, this embodiment adopts the scheme of 2,2,2-trifluoroethyl formate (CF3-CH2-O-CO-H), perfluorohex-1-ene (CF3-(CF2)3-CF=CF2) and methyl pentafluoroheptyl ketone (CF3(CF2)6-CO-CH3) to mix the azeotrope or azeotrope-like composition.

[0206] The same method as in Example 5 was used to determine whether the mixed solution had reached an azeotropic or azeotrope-like state. When the mass fraction of 2,2,2-trifluoroethyl formate, the mass fraction of perfluorohex-1-ene, and the mass fraction of methyl pentafluoroheptyl ketone in the mixed solution was 42.92% to 70.42%, 7.75% to 15.88%, and 21.83% to 41.20%, the boiling point temperature measurements in Table 18 indicate that, within a certain range, the mixed solution has formed an azeotrope or azeotrope-like composition with the lowest boiling point.

[0207] Table 18 Boiling point temperature measurement values

[0208] A mixture in which the mass of 2,2,2-trifluoroethyl formate accounts for 42.92% to 70.42% of the mass fraction of the mixture, the mass of perfluorohex-1-ene accounts for 7.75% to 15.88% of the mass fraction of the mixture, and the mass of methyl pentadecafluoroheptyl ketone accounts for 21.83% to 41.20% of the mass fraction of the mixture is measured and the thermal conductivity (maximum value: 0.103 W / m·K) and dielectric constant (maximum value: 2.8937) of the mixture are recorded.

[0209] Example 19

[0210] This embodiment provides a fluorinated liquid composition, which is a ternary fluorinated liquid organic compound consisting of a perfluoro or polyfluoro ester, a perfluoro or polyfluoro alcohol, and a perfluoro or polyfluoro ether.

[0211] Specifically, this embodiment adopts the scheme of ethyl trifluoroacetate (CF3-CO-O-CH2CH3), 1,1,1,3,3,3-hexafluoro-2-propanol ((CF3)2CH-OH) and heptafluoropropyl 1,2,2,2-tetrafluoroethyl ether (CF3CF2CF2-O-CFH-CF3) to mix the azeotrope or azeotrope-like composition.

[0212] The same method as in Example 5 was used to determine whether the mixed solution had reached an azeotropic or azeotrope-like state. When the mass fraction of ethyl trifluoroacetate, the mass fraction of 1,1,1,3,3,3-hexafluoro-2-propanol, and the mass fraction of heptafluoropropyl 1,2,2,2-tetrafluoroethyl ether in the mixed solution was 42.92%-56.5%, 12.43%-16.31%, and 31.07%-40.77%, the boiling point temperature measurements in Table 19 indicate that, within a certain range, the mixed solution has formed an azeotrope or azeotrope-like composition with the lowest boiling point.

[0213] Table 19 Boiling point temperature measurement values

[0214] A mixture in which the mass fraction of ethyl trifluoroacetate, the mass fraction of 1,1,1,3,3,3-hexafluoro-2-propanol, and the mass fraction of heptafluoropropyl 1,2,2,2-tetrafluoroethyl ether were respectively 42.92% to 56.5% and 12.43% to 16.31% of the mixture, was measured. The thermal conductivity (maximum value: 0.133 W / m·K) and dielectric constant (maximum value: 4.5613) of the mixture were measured and recorded.

[0215] Example 20

[0216] This embodiment provides a fluorinated liquid composition, which is a ternary fluorinated liquid organic compound consisting of a perfluoro or polyfluoro ester, a perfluoro or polyfluoro alcohol, and a perfluoro or polyfluoro ketone.

[0217] Specifically, this embodiment adopts the scheme of methyl trifluoroacetate (CF3-CO-O-CH3), perfluorotert-butyl alcohol ((CF3)3C-OH) and methyl pentafluoroethyl ketone (CF3CF2-CO-CH3) to mix the azeotrope or azeotrope-like composition.

[0218] The same method as in Example 5 was used to determine whether the mixed solution had reached an azeotropic or azeotrope-like state. When the mass fraction of methyl trifluoroacetate, the mass fraction of perfluorotert-butyl alcohol, and the mass fraction of methyl pentafluoroethyl ketone in the mixed solution was 38.32%-67.12%, 23.49%-44.06%, and 9.39%-17.62%, the boiling point temperature measurements in Table 20 indicate that, within a certain range, the mixed solution has formed an azeotrope or azeotrope-like composition with the lowest boiling point.

[0219] Table 20 Boiling point temperature measurement values

[0220] A mixture in which the mass fraction of methyl trifluoroacetate accounts for 38.32% to 67.12% of the mass fraction of the mixture, the mass fraction of perfluorotert-butyl alcohol accounts for 23.49% to 44.06% of the mass fraction of the mixture, and the mass fraction of methyl pentafluoroethyl ketone accounts for 9.39% to 17.62% of the mass fraction of the mixture is taken. The thermal conductivity (maximum value: 0.125 W / m·K) and dielectric constant of the mixture are measured and the data (maximum value: 4.0613) are recorded.

[0221] Example 21

[0222] This embodiment provides a fluorinated liquid composition, which is a ternary fluorinated liquid organic compound consisting of a perfluoro or polyfluoro ester, a perfluoro or polyfluoro ether, and a perfluoro or polyfluoro ketone.

[0223] Specifically, this embodiment adopts the scheme of hexafluoroisopropyl acetate (CH3-CO-O-CH(CF3)2), heptafluoroisopropyl methyl ether ((CF3)2CFH-O-CH3) and methyl pentafluoroheptyl ketone (CF3(CF2)6-CO-CH3) to mix the azeotrope or azeotrope-like composition.

[0224] The same method as in Example 5 was used to determine whether the mixed solution had reached an azeotropic or azeotrope-like state. When the mass fraction of hexafluoroisopropyl acetate, the mass fraction of heptafluoroisopropyl methyl ether, and the mass fraction of methyl pentadecafluoroheptyl ketone in the mixed solution was 39.69% to 53.19%, 17.55% to 22.62%, and 29.26% to 37.69%, the boiling point temperature measurements in Table 21 indicate that, within a certain range, the mixed solution has formed an azeotrope or azeotrope-like composition with the lowest boiling point.

[0225] Table 21 Boiling point temperature measurement values

[0226] A mixture in which the mass of hexafluoroisopropyl acetate accounts for 39.69% to 53.19% of the mass fraction of the mixed solution, the mass of heptafluoroisopropyl methyl ether accounts for 17.55% to 22.62% of the mass fraction of the mixed solution, and the mass of methyl pentadecafluoroheptyl ketone accounts for 29.26% to 37.69% of the mass fraction of the mixed solution is measured, and the thermal conductivity (maximum value: 0.123 W / m·K) and dielectric constant of the mixed solution are measured and recorded (maximum value: 4.2653).

[0227] Furthermore, the high thermal conductivity, low boiling point fluorinated liquid azeotrope or azeotrope-like composition provided in the above embodiment is selected from a mixed liquid within the azeotropic or azeotropic state range, and the thermal conductivity is tested by the transient hot wire method according to the ASTM D7896 standard to measure the maximum value; the dielectric constant is tested at 1 kHz according to the GB / T1409-2006 standard to measure the maximum value.

[0228] From the test results, it can be seen that the mixed liquids in the azeotropic or azeotropic-like state range all exhibit high thermal conductivity (the thermal conductivity of commercially available two-phase immersion fluorinated liquid is generally 0.04-0.07W / m·k) and good insulation performance. The maximum thermal conductivity and dielectric constant data of the mixed liquids in the azeotropic or azeotropic-like state range are shown in Table 22.

[0229] Table 22 Comparison results

[0230] This demonstrates that the fluorinated liquid composition provided by the present disclosure has a relatively high thermal conductivity and a good heat dissipation effect.

[0231] In summary, the fluorinated liquid composition provided by the present disclosure has a high thermal conductivity and good heat dissipation effect. It can be applied to chip cooling systems, large server cooling systems, supercomputing data center cooling systems, new energy vehicle thermal management systems, etc.

[0232] The above are merely preferred embodiments of the present disclosure and are not intended to limit the present disclosure. Those skilled in the art will readily appreciate that various modifications and variations of the present disclosure are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present disclosure shall be included within the scope of protection of the present disclosure. Industrial Applicability

[0233] The present disclosure provides a fluorinated liquid composition comprising a perfluoro- or polyfluoroester and any one or two of a perfluoro- or polyfluoroalkane, a perfluoro- or polyfluoroolefin, a perfluoro- or polyfluoroalcohol, a perfluoro- or polyfluoroether, or a perfluoro- or polyfluoroketone. The fluorinated liquid composition provided herein has a high thermal conductivity and excellent heat dissipation. It can be applied to chip cooling systems, large server cooling systems, supercomputing data center cooling systems, and new energy vehicle thermal management systems, and possesses excellent industrial applicability.

Claims

1. A fluorinated liquid composition, characterized in that: The fluorinated liquid composition includes perfluoro or polyfluoro esters, and the fluorinated liquid composition also includes any one or any two of perfluoro or polyfluoro alkanes, perfluoro or polyfluoro olefins, perfluoro or polyfluoro alcohols, perfluoro or polyfluoro ethers, and perfluoro or polyfluoro ketones; The fluorinated liquid composition is an azeotrope or azeotrope-like substance composed of various components.

2. The fluorinated liquid composition according to claim 1, characterized in that The difference in boiling point between the component with the highest boiling point and the component with the lowest boiling point in the fluorinated liquid composition does not exceed 30°C.

3. The fluorinated liquid composition according to claim 1 or 2, characterized in that The fluorinated liquid composition is selected from: perfluoro or polyfluoro ester and perfluoro or polyfluoro alkane; perfluoro or polyfluoro ester and perfluoro or polyfluoro olefin; perfluoro or polyfluoro ester and perfluoro or polyfluoro alcohol; perfluoro or polyfluoro ester and perfluoro or polyfluoro ether; perfluoro or polyfluoro ester and perfluoro or polyfluoro ketone; perfluoro or polyfluoro ester, perfluoro or polyfluoro alkane and perfluoro or polyfluoro olefin; perfluoro or polyfluoro ester, perfluoro or polyfluoro alkane and perfluoro or polyfluoro alcohol; perfluoro or polyfluoro ester, perfluoro or polyfluoro alkane and perfluoro or polyfluoro ether; Perfluoro or polyfluoro esters, perfluoro or polyfluoro alkanes and perfluoro or polyfluoro ketones; perfluoro or polyfluoro esters, perfluoro or polyfluoro olefins and perfluoro or polyfluoro alcohols; perfluoro or polyfluoro esters, perfluoro or polyfluoro olefins and perfluoro or polyfluoro ethers; perfluoro or polyfluoro esters, perfluoro or polyfluoro olefins and perfluoro or polyfluoro ketones; perfluoro or polyfluoro esters, perfluoro or polyfluoro alcohols and perfluoro or polyfluoro ethers; perfluoro or polyfluoro esters, perfluoro or polyfluoro alcohols and perfluoro or polyfluoro ketones; perfluoro or polyfluoro esters, perfluoro or polyfluoro ethers and perfluoro or polyfluoro ketones.

4. The fluorinated liquid composition according to any one of claims 1 to 3, characterized in that The perfluoro or polyfluoro ester is selected from any one of methyl trifluoropyruvate, ethyl pentafluoropropionate, ethyl trifluoropyruvate, 2,2,2-trifluoroethyl formate, trifluoroethanol acetate, trifluoroethanol trifluoroacetate, methyl pentafluoropropionate, methyl heptafluorobutyrate, methyl heptafluoroisobutyrate, isopropyl trifluoroacetate, ethyl trifluoroacetate, methyl trifluoroacetate and hexafluoroisopropyl acetate; Preferably, the perfluoro or polyfluoro ester is selected from 2,2,2-trifluoroethyl formate, hexafluoroisopropyl acetate, ethyl trifluoroacetate or methyl trifluoroacetate.

5. The fluorinated liquid composition according to any one of claims 1 to 4, characterized in that The perfluoro or polyfluoroalkane is selected from any one of perfluoro(methylcyclohexane), perfluoro-2-methylpentane, 1H-perfluorohexane, perfluoro-n-pentane, 1H-perfluoropentane, perfluoro-1,2-dimethylcyclobutane, perfluorokerosene, perfluorohexane, hexafluorobenzene, hexafluoroheptane, 2H,3H-decafluoropentane and 1,1,2,2,3,3,4,4,5-nonafluorocyclopentane; Preferably, the perfluoro or polyfluoro alkane is selected from perfluoro-2-methylpentane or 2H,3H-decafluoropentane.

6. The fluorinated liquid composition according to any one of claims 1 to 5, characterized in that The fluorinated liquid composition consists of hexafluoroisopropyl acetate and perfluoro-2-methylpentane; or, the fluorinated liquid composition consists of hexafluoroisopropyl acetate and 2H,3H-decafluoropentane.

7. The fluorinated liquid composition according to any one of claims 1 to 6, characterized in that The perfluoro or polyfluoro olefin is selected from any one of 1H, 1H, 2H-perfluoro-1-hexene, 1H-perfluorobut-1-ene, octafluorocyclopentene, perfluorohept-1-ene, perfluoro(2-methyl-2-pentene), perfluorohex-1-ene, dodecafluoro-1,9-decadiene and 6H-perfluoro-1-hexene.

8. The liquid chemical composition according to any one of claims 1 to 7, characterized in that The fluorinated liquid composition is composed of hexafluoroisopropyl acetate and perfluoro(2-methyl-2-pentene); or, the fluorinated liquid composition is composed of methyl pentafluoropropionate and perfluorohex-1-ene; or, the fluorinated liquid composition is composed of hexafluoroisopropyl acetate, perfluoro-2-methylpentane and perfluoro(2-methyl-2-pentene); or, the fluorinated liquid composition is composed of ethyl trifluoroacetate, 1H-perfluoropentane and perfluoro(2-methyl-2-pentene).

9. The fluorinated liquid composition according to any one of claims 1 to 8, characterized in that The perfluoro or polyfluoro alcohol is selected from any one of perfluoro tert-butyl alcohol, 2,2,2-trifluoroethanol, 2,2,3,3,3-pentafluoro-1-propanol, 1,1,1,3,3,3-hexafluoro-2-methyl-2-propanol, 1,1,1,3,3,3-hexafluoro-2-propanol and 2,2,3,3,4,4,4-heptafluoro-1-butanol.

10. The fluorinated liquid composition according to any one of claims 1 to 9, characterized in that The fluorinated liquid composition consists of hexafluoroisopropyl acetate and perfluoro-tert-butyl alcohol; or, the fluorinated liquid composition consists of methyl trifluoroacetate and perfluoro-tert-butyl alcohol; or, the fluorinated liquid composition consists of hexafluoroisopropyl acetate, perfluoro-2-methylpentane and perfluoro-tert-butyl alcohol; or, the fluorinated liquid composition consists of hexafluoroisopropyl acetate, perfluoro(2-methyl-2-pentene) and perfluoro-tert-butyl alcohol.

11. The fluorinated liquid composition according to any one of claims 1 to 10, characterized in that The perfluoro or polyfluoro ether is selected from perfluorobutyl methyl ether, perfluoroisobutyl methyl ether, bis(2,2,2-trifluoroethyl) ether, fluoromethyl-1,1,1,3,3,3-hexafluoroisopropyl ether, 2,2,2-trifluoroethyl methyl ether, 2,2,3,3,3-pentafluoropropyl methyl ether, heptafluoropropyl 1,2,2,2-tetrafluoroethyl ether, difluoromethyl 2,2,3,3-tetrafluoropropyl ether, heptafluoroisopropyl methyl ether, bis- Any one of (1,2,2,2-tetrafluoroethyl) ether, 1,1,2,2-tetrafluoroethyl ethyl ether, ethyl 1,1,2,3,3,3-hexafluoropropyl ether, methyl 2,2,3,3,3-pentafluoropropyl ether, allyl heptafluoroisopropyl ether, 1,1,2,2-tetrafluoroethyl 2,2,3,3-tetrafluoropropyl ether, 1,1,2,3,3,3-hexafluoropropyl methyl ether and 1,1,2,2-tetrafluoroethyl methyl ether.

12. The fluorinated liquid composition according to any one of claims 1 to 10, characterized in that The fluorinated liquid composition is composed of hexafluoroisopropyl acetate and fluoromethyl-1,1,1,3,3,3-hexafluoroisopropyl ether; or, the fluorinated liquid composition is composed of methyl trifluoroacetate and 1,1,2,3,3,3-hexafluoropropyl methyl ether; or, the fluorinated liquid composition is composed of hexafluoroisopropyl acetate, perfluoro-2-methylpentane and methyl 2,2,3,3,3-pentafluoropropyl ether; or, the fluorinated liquid composition is composed of hexafluoroisopropyl acetate, perfluoro(2-methyl-2-pentene) and methyl 2,2,3,3,3-pentafluoropropyl ether; or, the fluorinated liquid composition is composed of ethyl trifluoroacetate, 1,1,1,3,3,3-hexafluoro-2-propanol and heptafluoropropyl 1,2,2,2-tetrafluoroethyl ether.

13. The fluorinated liquid composition according to any one of claims 1 to 12, characterized in that The perfluoro or polyfluoro ketone is selected from any one of methyl perfluorobutyl ketone, 3H-perfluoropentane-2,4-dione, 1,1,1,2,2,4,5,5,5-nonafluoro-4-(trifluoromethyl)-3-pentanone, methyl pentafluoroethyl ketone, methyl heptafluoropropyl ketone and methyl pentafluoroheptyl ketone.

14. The fluorinated liquid composition according to any one of claims 1 to 13, characterized in that The fluorinated liquid composition is composed of hexafluoroisopropyl acetate and 1,1,1,2,2,4,5,5,5-nonafluoro-4-(trifluoromethyl)-3-pentanone; or, the fluorinated liquid composition is composed of methyl trifluoroacetate and perfluorohexanone; or, the fluorinated liquid composition is composed of hexafluoroisopropyl acetate, 2H,3H-decafluoropentane and perfluorohexanone; or, the fluorinated liquid composition is composed of 2,2,2-trifluoroethyl formate, perfluorohex-1-ene and methyl pentafluoroheptyl ketone; or, the fluorinated liquid composition is composed of methyl trifluoroacetate, perfluoro tert-butyl alcohol and methyl pentafluoroethyl ketone; or, the fluorinated liquid composition is composed of hexafluoroisopropyl acetate, heptafluoroisopropyl methyl ether and methyl pentafluoroheptyl ketone.

15. The fluorinated liquid composition according to any one of claims 1 to 14, characterized in that The fluorinated liquid composition also has at least one of the following characteristics: Feature 1: The thermal conductivity of the fluorinated liquid composition is ≥ 0.08W / (m·k); Feature 2: The boiling point of the fluorinated liquid composition is 30-80°C; Feature 3: The dielectric constant of the fluorinated liquid composition under 1KHz condition is ≤5.

16. Use of the fluorinated liquid composition according to any one of claims 1 to 15 in preparing a cooling medium; Preferably, the cooling medium is an immersion cooling medium; Preferably, the cooling medium is used in a liquid cooling system of electronic equipment; Preferably, the liquid cooling system of the electronic device includes a chip cooling system, a server cooling system, a supercomputing data center cooling system or a new energy vehicle thermal management system.

17. A liquid cooling system, comprising an electronic device and a liquid cooling medium prepared from the fluorinated liquid composition according to any one of claims 1 to 15, wherein the electronic device is immersed in the liquid cooling medium.

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