A kind of heat-conducting oil based on modified graphene and preparation method thereof

A graphene and heat transfer oil technology, applied in chemical instruments and methods, heat exchange materials, etc., can solve the problem that dispersion stability and oxidation stability are not significantly improved, prone to sedimentation and agglomeration, and easy to desorb, etc. problems, to achieve the effect of delaying aging and coking, improving heat conduction efficiency, and good anti-oxidation function

Active Publication Date: 2021-06-15
SPECIAL EQUIP SAFETY SUPERVISION INSPECTION INST OF JIANGSU PROVINCE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the thermal conductivity of conventional metals is generally 100-400W / mK, and the thermal conductivity of its oxides is generally lower than 20W / mK, which also has the disadvantage of being easy to agglomerate. Easy to desorb in
[0005] Chinese patent CN201410294436.6 reports a nanofluid heat-conducting oil containing carbon nanotubes or / and graphene and its preparation method. This nanofluid heat-conducting oil is to remove oxygen-containing functional groups on the surface of carbon nanotubes and graphene through heat treatment, and wash , After drying, add organic synthetic heat transfer oil or mineral oil, and obtain it through ultrasonic dispersion. This simple dispersed heat transfer oil will face the problem of graphene and carbon nanotube agglomeration in the later use process
[0006] Adding nanoparticles and carbon nanomaterials to the heat transfer oil can significantly improve the heat transfer efficiency, but since the specific gravity of these nanomaterials is greater than that of the base oil, sedimentation and agglomeration are prone to occur after long-term storage
Moreover, in the existing reported technologies, on the basis of improving the heat transfer efficiency of heat transfer oil, there is no obvious improvement effect on other dispersion stability and oxidation stability.

Method used

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  • A kind of heat-conducting oil based on modified graphene and preparation method thereof
  • A kind of heat-conducting oil based on modified graphene and preparation method thereof
  • A kind of heat-conducting oil based on modified graphene and preparation method thereof

Examples

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Effect test

Embodiment 1

[0033] A preparation method based on modified graphene heat transfer oil, comprising the steps of:

[0034] (1) Take 1 part of flake graphite and disperse it in 25 parts of concentrated sulfuric acid, add 2.3 parts of potassium permanganate at 0°C, react at 60°C for 3 hours, cool down to 0°C, add 1 part of potassium permanganate, and keep at 10°C React for 30 hours; after the reaction, add 1.2 parts of hydrogen peroxide and ultrasonic for 20 minutes, and obtain hydroxyl-rich graphene oxide after cleaning and drying;

[0035] (2) Take 1 part of hydroxyl-rich graphene oxide prepared in step (1), 1 part of triethyl phosphite and 0.05 part of NaOH in 50 parts of solvent, heat and stir, heat up to 80 ° C, and react at constant temperature for 8 hours, After cooling down, centrifuge, redisperse and wash with water and ethanol, and obtain modified graphene after removing water;

[0036] (3) Take 0.05 parts of modified graphene, 0.01 parts of N,N′-disalicylidene-1,2-propylenediamine,...

Embodiment 2

[0038] A preparation method based on modified graphene heat transfer oil, comprising the steps of:

[0039] (1) Take 1 part of flake graphite and disperse it in 25 parts of concentrated sulfuric acid, add 2.3 parts of potassium permanganate at 0°C, react at 60°C for 6 hours, cool down to 0°C, add 1 part of potassium permanganate, and keep at 10°C React for 20 hours; after the reaction, add 1.2 parts of hydrogen peroxide and ultrasonic for 20 minutes, and obtain hydroxyl-rich graphene oxide after cleaning and drying;

[0040] (2) Take 1 part of hydroxyl-rich graphene oxide prepared in step (1), 1 part of triethyl phosphate and 0.05 part of KOH in 50 parts of solvent, heat and stir, heat up to 60 °C, and react at constant temperature for 10 h, After cooling down, centrifuge, redisperse and wash with water and ethanol, and obtain modified graphene after removing water;

[0041] (3) Take 0.5 part of modified graphene, 0.1 part of methyl benzotriazole, 0.1 part of heat transfer oi...

Embodiment 3

[0043] A preparation method based on modified graphene heat transfer oil, comprising the steps of:

[0044](1) Take 1 part of flake graphite and disperse it in 25 parts of concentrated sulfuric acid, add 2.3 parts of potassium permanganate at 0°C, react at 60°C for 5 hours, cool down to 0°C, add 1 part of potassium permanganate, and keep at 10°C React for 25 hours; after the reaction, add 1.2 parts of hydrogen peroxide and ultrasonic for 20 minutes, and obtain hydroxyl-rich graphene oxide after cleaning and drying;

[0045] (2) Get 1 part of hydroxyl-rich graphene oxide prepared in step (1), 1 part of tris (2-ethylhexyl) phosphite and 0.05 part of NaOCH 3 Place in 50 parts of solvent, heat and stir, heat up to 100 ℃ for 6 hours, cool down, centrifuge, redisperse and wash with water and ethanol, and obtain modified graphene after removing water;

[0046] (3) Take 0.2 part of modified graphene, 0.05 part of 2-amino-5-mercapto-1,3,4-thiadiazole, 0.07 part of heat transfer oil ad...

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Abstract

The invention discloses a modified graphene-based heat-conducting oil and a preparation method thereof. The components of the heat-conducting oil include modified graphene, a heat-conducting oil base liquid, a metal passivator, and a heat-conducting oil additive. The specific preparation method is as follows: firstly , prepare hydroxyl-rich graphene oxide by an optimized oxidation reaction method, react hydroxyl-rich graphene oxide with alkyl phosphate or alkyl phosphite compounds to obtain modified graphene, and then combine modified graphene with other components to obtain modified graphene. A certain proportion is prepared by ultrasonic-assisted shear dispersion process. The heat-conducting oil based on modified graphene provided by the invention has good dispersion uniformity and stability, improves the heat-conducting efficiency of the heat-conducting oil and at the same time improves its oxidation resistance, prolongs the service life of the heat-conducting oil, and saves energy and reduces consumption.

Description

technical field [0001] The invention relates to the technical field of heat transfer media, in particular to a heat transfer oil based on modified graphene and a preparation method thereof. Background technique [0002] Heat transfer oil, also known as heat transfer oil, heat carrier heat transfer oil, etc., is a heat transfer medium. Heat conduction oil has the advantages of uniform heating, accurate temperature control, good heat transfer effect, convenient transportation, long service life, low maintenance cost, and effective reduction of energy loss. It has been widely used in petrochemical, energy, food, synthetic resin, medicine, textile Printing and dyeing, building materials, transportation and other industries. Its main components are alkyl organic compounds or aromatic-based chemical compounds, which are prone to cracking and polymerization reactions during use, leading to deterioration reactions such as aging and coking, which seriously affect the service life of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K5/10
CPCC09K5/10
Inventor 刘峥王勤生杨永强区炳显王荣霞陆瑶程小豹
Owner SPECIAL EQUIP SAFETY SUPERVISION INSPECTION INST OF JIANGSU PROVINCE
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