Foaming material, preparation method thereof and refrigeration device

Abstract

The embodiment of the invention provides a foaming material, a preparation method thereof and a refrigerating device. The foaming material comprises a component A and a component B. The component A comprises, by weight, 15-18 parts of a foaming agent, 93-97 parts of polyether polyol, 3-7 parts of polytetrahydrofuran ether polyol, 0.8-1.2 parts of a surfactant and 0.6-1 part of a catalyst, and the component B comprises, by weight, 145-151 parts of isocyanate. According to the foaming material provided by the embodiment of the invention, by adding the polytetrahydrofuran ether polyol, the mechanical property of the foaming material can be improved, the foaming material is not prone to cracking and other problems in the using process, so that the heat preservation performance of the refrigerator is kept stable, the adding amount of the foaming agent in the foaming material is low, and the foaming material is suitable for being used in the refrigerator. The production cost of the foaming material can be reduced, and meanwhile the environment-friendly performance of the foaming material is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of foaming materials, in particular to a foaming material, a preparation method thereof and a refrigeration device. BACKGROUND

[0002] With the improvement of people's living standards, the refrigerator has become one of the indispensable electrical appliances in modern family life. The cabinet and door body of the refrigerator usually have a thermal insulation layer. The thermal insulation layer can isolate the temperature exchange between the inside and outside of the refrigerator, prevent the external temperature from affecting the internal temperature of the refrigerator, thereby maintaining the constant internal temperature of the refrigerator, reducing the working frequency of the compressor, and achieving the purpose of energy saving.

[0003] The material of the thermal insulation layer is usually foaming material. However, the mechanical properties of the existing foaming material are insufficient, which is easy to crack during use, thereby reducing the thermal insulation performance of the refrigerator. SUMMARY

[0004] Based on this, the present application provides a foaming material, a preparation method thereof and a refrigeration device.

[0005] In a first aspect, the present application provides a foaming material, which comprises A component and B component. In terms of weight parts, the A component comprises foaming agent 15-18 parts, polyether polyol 93-97 parts, polytetrahydrofuran ether polyol 3-7 parts, surfactant 0.8-1.2 parts, and catalyst 0.6-1 part. The B component comprises isocyanate 145-151 parts.

[0006] In some embodiments, the polyether polyol is polymerized from a starter and an alkylene oxide; and / or, The surfactant comprises at least one of a non-ionic surfactant and an anionic surfactant.

[0007] In some embodiments, the starter comprises at least one of an alcohol starter and an amine starter, and the alkylene oxide comprises at least one of ethylene oxide, propylene oxide and butylene oxide; and / or, The surfactant comprises a non-ionic surfactant and an anionic surfactant, and the mass ratio of the non-ionic surfactant to the anionic surfactant is (3-5) : 1.

[0008] In some embodiments, the non-ionic surfactant comprises at least one of a polyether-modified trisiloxane and a polyoxyethylene-polyoxypropylene block polyether siloxane; and / or, The anionic surfactant comprises at least one of an alkyl benzene sulfonate, an alpha-olefin sulfonate and a fatty alcohol polyoxyethylene ether sulfate.

[0009] In some embodiments, the catalyst comprises an amine catalyst; and / or, The foaming agent includes an alkane foaming agent.

[0010] In some embodiments, the amine catalyst is a tertiary amine catalyst, and the tertiary amine catalyst includes at least one of dimethylcyclohexylamine, triethylenediamine, and pentamethyldiethylene triamine; and / or, The alkane foaming agent includes at least one of C3-C10 alkane.

[0011] In some embodiments, the A component further includes, in parts by weight, 3-7 parts of inorganic nanoparticles, the Dv50 particle size of the inorganic nanoparticles being 10-50 nm.

[0012] In some embodiments, the inorganic nanoparticles include at least one of silica particles, alumina particles, and titanium dioxide particles.

[0013] In a second aspect, the embodiments of the present application provide a preparation method of a foamed material, and the preparation method includes: Providing an A component and a B component, the A component including, in parts by weight, 15-18 parts of a foaming agent, 93-97 parts of a polyether polyol, 3-7 parts of a polytetrahydrofuran ether polyol, 0.8-1.2 parts of a surfactant, and 0.6-1 part of a catalyst, and the B component including 145-151 parts of an isocyanate; Mixing the A component and the B component to obtain a mixed material, and polymerizing and foaming the mixed material to obtain a foamed material.

[0014] In a third aspect, the embodiments of the present application provide a refrigeration device including an insulation layer, and the insulation layer includes the foamed material or the foamed material prepared by the preparation method.

[0015] The foamed material provided by the embodiments of the present application can improve the mechanical properties of the foamed material by adding the polytetrahydrofuran ether polyol, and the foamed material is less likely to crack during use, so that the insulation performance of the refrigerator remains stable, and the addition amount of the foaming agent in the foamed material is low, which can reduce the production cost of the foamed material and improve the environmental protection performance of the foamed material. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced.

[0017] Figure 1 The flow chart of the preparation method of the foamed material provided by the embodiments of the present application. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present application will be clearly and completely described below. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of the present application.

[0019] In the present application, the association relationship of the associated objects described by "and / or" indicates that there can be three kinds of relationships, for example, A and / or B can represent the following three cases: A exists alone, A and B exist simultaneously, and B exists alone. Wherein A and B can be singular or plural.

[0020] In the present application, "at least one" means one or more, and "multiple" means two or more. "At least one", "at least one of the following" or the like means any combination of these items, including single item or any combination of multiple items. For example, "at least one of a, b or c", or "at least one of a, b and c", can represent a, b, c, a+b, a+c, b+c, or a+b+c, wherein a, b and c can be single or multiple.

[0021] "Parts by weight" refers to a basic unit of measurement indicating the mass ratio relationship of multiple components. 1 part can represent any unit mass, such as 1 g, 1 kg, or 2 g, 2 kg, etc. If we say that the weight of component A is a parts, and the weight of component B is b parts, it means that the mass ratio of component A to component B is a:b. Alternatively, it means that the mass of component A is aK and the mass of component B is bK (K is any number, indicating a multiple factor). It should not be misunderstood that unlike the parts by weight, the sum of the parts by weight of all components is not limited to 100 parts.

[0022] Various embodiments of the present application can exist in the form of a range; it should be understood that the description in the form of a range is only for the convenience and brevity, and should not be understood as a hard limit on the scope of the present application; therefore, it should be considered that the described range has specifically disclosed all possible sub-ranges and single values within the range. For example, it should be considered that the range description from 1 to 6 has specifically disclosed sub-ranges, such as from 1 to 3, from 1 to 4, from 1 to 5, from 2 to 4, from 2 to 6, from 3 to 6, etc., as well as single numbers within the range, such as 1, 2, 3, 4, 5 and 6. In addition, whenever a numerical range is indicated in the present application, it refers to any cited number (fraction or integer) within the indicated range.

[0023] The embodiment of the present application provides a kind of foamed material, including A component and B component, by weight part, the A component includes foaming agent 15-18 parts, polyether polyol 93-97 parts, polytetrahydrofuran ether polyol 3-7 parts, surfactant 0.8-1.2 parts, catalyst 0.6-1 part, the B component includes isocyanate 145-151 parts.

[0024] It should be noted that polytetrahydrofuran ether polyol, also known as polytetramethylene ether glycol, foreign name PTMG / PTMEG, CAS number 25190-06-1, molecular formula is HO [CH2CH2CH2CH2O] n H, wherein the degree of polymerization n is 10-100.

[0025] Exemplarily, in the foamed material, the number of parts of the foaming agent can be 15 parts, 16 parts, 17 parts, 18 parts, etc., the number of parts of the polyether polyol can be 93 parts, 94 parts, 95 parts, 96 parts, etc., the number of parts of the polytetrahydrofuran ether polyol can be 3 parts, 4 parts, 5 parts, 6 parts, 7 parts, etc., the number of parts of the surfactant can be 0.8 parts, 0.9 parts, 1 part, 1.1 parts, 1.2 parts, etc., the number of parts of the catalyst can be 0.6 parts, 0.7 parts, 0.8 parts, 0.9 parts, 1 part, etc., and the number of parts of the isocyanate can be 145 parts, 146 parts, 147 parts, 148 parts, 149 parts, 150 parts, 151 parts, etc.

[0026] The foamed material provided by the embodiment of the present application can improve the mechanical properties of the foamed material by adding polytetrahydrofuran ether polyol, and the foamed material is less likely to crack during use, so that the heat preservation performance of the refrigerator remains stable, and the addition amount of the foaming agent in the foamed material is low, which can reduce the production cost of the foamed material and improve the environmental protection performance of the foamed material.

[0027] It should be noted that in the traditional polyurethane foamed material, the addition amount of the foaming agent is more than 35wt%, while in the present application, the addition amount of the foaming agent is only 15-18 parts, compared with the traditional polyurethane foamed material, the amount of foaming agent is less, which can reduce the cost, at the same time, reduce the volatile components in the foam, improve the environmental protection and safety.

[0028] Exemplarily, the polyether polyol is polymerized from a starter and an alkylene oxide.

[0029] Exemplarily, the polyether polyol molecule generally contains 3-8 hydroxyl groups, and the functionality is high, and after the polyether polyol reacts with isocyanate, a rigid three-dimensional network with high crosslinking degree is formed; the polytetrahydrofuran ether polyol molecule contains two hydroxyl groups (at both ends of the molecular chain), and the functionality is low, and the linear molecular chain of the polytetrahydrofuran ether polyol is only connected by the terminal hydroxyl groups and isocyanate. It can be understood that the high crosslinking degree of the polyether polyol can form a hard foam skeleton of the foaming material to avoid foam collapse, and the low crosslinking degree of the polytetrahydrofuran ether polyol can supplement the mechanical support of the linear chain segment, and does not increase the crosslinking density to avoid the brittleness of the foam.

[0030] Exemplarily, the hydroxyl value of the polyether polyol is 350 mgKOH / g-550 mgKOH / g, and the hydroxyl value of the polytetrahydrofuran ether polyol is 460 mgKOH / g-490 mgKOH / g. It can be seen that the hydroxyl value ranges of the polyether polyol and the polytetrahydrofuran ether polyol overlap, and the reactivity of both with isocyanate (black material) is matched, which can avoid uneven foam performance caused by different reaction rates.

[0031] Exemplarily, the viscosity of the polyether polyol is 1500 mPa s-5000 mPa s, and the viscosity of the polytetrahydrofuran ether polyol is 100 mPa s-500 mPa s. It can be seen that the viscosity of the polyether polyol is high, and the viscosity of the polytetrahydrofuran ether polyol is low, so that by adding the polytetrahydrofuran ether polyol, the premixing difficulty of the foaming material can be reduced, thereby reducing the process difficulty and improving the mixing uniformity of the foaming system. It should be noted that in the embodiments of the present application, the viscosity of the polyether polyol and the viscosity of the polytetrahydrofuran ether polyol are both determined by using the national standard GB / T11983-2008 (sample temperature 25°C).

[0032] Exemplarily, the initiator includes at least one of an alcohol initiator and an amine initiator, the alcohol initiator includes at least one of a dihydric alcohol, a trihydric alcohol and a polyhydric alcohol, the dihydric alcohol includes at least one of propylene glycol and ethylene glycol, the polyhydric alcohol includes at least one of glycerol, trimethylolpropane, pentaerythritol, xylitol, sorbitol and sucrose, and the amine initiator includes at least one of diethylamine and diethylene triamine.

[0033] Exemplarily, the alkylene oxide includes at least one of ethylene oxide (EO), propylene oxide (PO) and butylene oxide (BO).

[0034] Exemplarily, the surfactant includes at least one of a non-ionic surfactant and an anionic surfactant.

[0035] In some embodiments, the surfactant includes a non-ionic surfactant and an anionic surfactant, and a mass ratio of the non-ionic surfactant and the anionic surfactant is (3-5) : 1, for example, 3 : 1, 3.5 : 1, 4 : 1, 4.5 : 1, 5 : 1, or the like.

[0036] It should be noted that by mixing the non-ionic surfactant and the anionic surfactant, the non-ionic surfactant can be adsorbed on the surface of the tiny particles in the foaming system due to its large molecular weight and long lipophilic end chain, to form stable nucleation sites, thereby reducing the energy barrier of bubble generation. The anionic surfactant carries a negative charge and can be adsorbed and gathered around the lipophilic end of the non-ionic surfactant, further increasing the density of the nucleation sites. The more nucleation sites, the more initial bubbles formed during foaming, and the smaller the average size of the bubbles under the same foaming volume. It can be understood that refining the cell size can make the cells of the foamed material more uniform, reduce gas convection and radiation heat transfer, and reduce the thermal conductivity of the foamed material. In addition, refining the cell size can also improve the flowability of the foamed material, and in the process of foaming the refrigerator, it can also improve the flowability of the foamed material in the narrow area around the refrigerator evaporator, thereby improving the filling coverage.

[0037] Illustratively, the non-ionic surfactant includes at least one of polyether-modified trisiloxane and polyoxyethylene-polyoxypropylene block polyether siloxane.

[0038] Illustratively, the polyether-modified trisiloxane includes at least one of Tegostab B 8462 (Wacker), Siltech F-120 (Siltech).

[0039] Illustratively, the polyoxyethylene-polyoxypropylene block polyether siloxane includes at least one of Niax L-6900 (Momentive), BYK-348 (BYK).

[0040] Illustratively, the anionic surfactant includes at least one of alkyl benzene sulfonate, alpha-olefin sulfonate, fatty alcohol polyoxyethylene ether sulfate.

[0041] Illustratively, the alkyl benzene sulfonate includes sodium dodecyl benzene sulfonate, the alpha-olefin sulfonate includes sodium C14-16 alpha-olefin sulfonate, and the fatty alcohol polyoxyethylene ether sulfate includes sodium lauryl polyoxyethylene ether sulfate.

[0042] Illustratively, the foaming agent includes an alkane foaming agent, and optionally, the alkane foaming agent includes at least one of C3-C10 alkane.

[0043] In some embodiments, the alkane-based blowing agent comprises cyclopentane and isobutane, and the mass ratio of cyclopentane to isobutane is (13-16) : (1-1.5), for example 15 : 1.5.

[0044] In some other embodiments, the alkane-based blowing agent comprises cyclopentane and n-butane, and the mass ratio of cyclopentane to n-butane is (0.8-1.2) : (0.8-1.2), for example 1 : 1.

[0045] Illustratively, the catalyst comprises an amine catalyst. It should be noted that by using the amine catalyst, the gel reaction rate in the foaming reaction can be enhanced, the foam curing time can be shortened, the foam shrinkage rate can be reduced, and the foam thermal conductivity can be optimized, and the thermal conductivity coefficient can be further reduced.

[0046] Illustratively, the amine catalyst is a tertiary amine catalyst, and optionally, the tertiary amine catalyst comprises at least one of dimethylcyclohexylamine, triethylenediamine, and pentamethyldiethylene triamine.

[0047] In some embodiments, the catalyst comprises dimethylcyclohexylamine and triethylenediamine, and the mass ratio of dimethylcyclohexylamine to triethylenediamine is (0.9-1.1) : (0.7-0.9), for example 1 : 0.8.

[0048] In some embodiments, the A component further comprises, in parts by weight, inorganic nanoparticles 3-7 parts (for example 3 parts, 4 parts, 5 parts, 6 parts, 7 parts, etc.), and the Dv50 particle size of the inorganic nanoparticles is 10-50 nm (for example 10 nm, 20 nm, 30 nm, 40 nm, 50 nm, etc.).

[0049] It should be noted that the solid skeleton of the foamed material is one of the main paths of heat conduction. When inorganic nanoparticles are added to the foamed material, the inorganic nanoparticles will be uniformly dispersed in the skeleton, dividing the continuous solid conduction channel, increasing the heat transfer resistance, reducing the conduction efficiency of heat through the solid skeleton, and thus the thermal conductivity coefficient of the foamed material can be reduced, and the heat preservation performance of the foamed material can be improved. In addition, by adding inorganic nanoparticles to the foamed material, the high temperature resistance (dimensional change rate ≤0.3% at 50℃) of the foamed material can also be improved, so that the refrigerator containing the foamed material can be applied to tropical regions.

[0050] Illustratively, the inorganic nanoparticles comprise at least one of silica particles, alumina particles, and titanium dioxide particles.

[0051] Please refer to Figure 1 The embodiments of the present application also provide a preparation method of a foamed material, for preparing the foamed material as described above, and the preparation method comprises: S100, providing an A component and a B component, the A component comprising, in parts by weight, a blowing agent 15-18 parts, a polyether polyol 93-97 parts, a polytetrahydrofuran ether polyol 3-7 parts, a surfactant 0.8-1.2 parts, a catalyst 0.6-1 part, the B component comprising an isocyanate 145-151 parts; S200, mixing the A component and the B component to obtain a mixture, and polymerizing and foaming the mixture to obtain a foamed material.

[0052] In some embodiments, the A component further comprises, in parts by weight, inorganic nanoparticles 3-7 parts (for example, 3 parts, 4 parts, 5 parts, 6 parts, 7 parts, etc.), the inorganic nanoparticles having a Dv50 particle size of 10-50 nm (for example, 10 nm, 20 nm, 30 nm, 40 nm, 50 nm, etc.).

[0053] The embodiments of the present application also provide a refrigeration device comprising a thermal insulation layer, the thermal insulation layer comprising the foamed material as described above.

[0054] Exemplarily, the refrigeration device can be a refrigerator, a freezer, a cold drink machine, a refrigerated wine cabinet, a freezer, an ice cream machine, an ice maker, etc.

[0055] Exemplarily, the refrigeration device comprises a cabinet, the cabinet comprising a shell and a cabinet liner, the cabinet liner being arranged inside the shell, and the thermal insulation layer being arranged between the shell and the cabinet liner.

[0056] Exemplarily, the refrigeration device comprises a door body, the door body comprising a door panel and a door liner arranged in a spaced manner, and the thermal insulation layer being arranged between the door panel and the door liner.

[0057] The present application will be described in detail below through specific embodiments, and the following embodiments are only part of the embodiments of the present application, and are not a limitation on the present application.

[0058] Embodiment 1 A foamed material, a preparation method thereof comprising: Step 1, providing an A component and a B component, the A component comprising, in parts by weight, a blowing agent 16.5 parts, a polyether polyol 95 parts, a polytetrahydrofuran ether polyol 5 parts, a surfactant 1 part, a catalyst 0.8 part, the B component comprising an isocyanate 148 parts; wherein the blowing agent 16.5 parts comprises cyclopentane (CP) 15 parts and isobutane (R600a) 1.5 parts, the surfactant 1 part comprises polyether modified trisiloxane (Tegostab B 8462, Wacker) 1 part, and the catalyst 0.8 part comprises dimethylcyclohexylamine (DMCHA) 0.44 part and triethylenediamine (TEDA) 0.36 part.

[0059] Step 2, mixing the A component and the B component to obtain a mixture, and polymerizing and foaming the mixture to obtain a foamed material.

[0060] Example 2 A foamed material, the preparation method of which is compared with that of Example 1, and the difference lies in that: In Step 1, the A component includes, in parts by weight, 15 parts of a blowing agent, 93 parts of a polyether polyol, 3 parts of a polytetrahydrofuran ether polyol, 0.8 parts of a surfactant, and 0.6 parts of a catalyst, and the B component includes 148 parts of an isocyanate. In Step 1, the A component includes, in parts by weight, 15 parts of a blowing agent, 93 parts of a polyether polyol, 3 parts of a polytetrahydrofuran ether polyol, 0.8 parts of a surfactant, and 0.6 parts of a catalyst, and the B component includes 148 parts of an isocyanate.

[0061] Example 3 A foamed material, the preparation method of which is compared with that of Example 1, and the difference lies in that: In Step 1, the A component includes, in parts by weight, 18 parts of a blowing agent, 97 parts of a polyether polyol, 7 parts of a polytetrahydrofuran ether polyol, 1.2 parts of a surfactant, and 1 part of a catalyst, and the B component includes 151 parts of an isocyanate. In Step 1, the A component includes, in parts by weight, 15 parts of a blowing agent, 93 parts of a polyether polyol, 3 parts of a polytetrahydrofuran ether polyol, 0.8 parts of a surfactant, and 0.6 parts of a catalyst, and the B component includes 148 parts of an isocyanate.

[0062] Example 4 A foamed material, the preparation method of which is compared with that of Example 1, and the difference lies in that: In Step 1, the surfactant 1 part includes 0.8 parts of a polyether-modified trisiloxane (Tegostab B 8462, Evonik) and 0.2 parts of sodium dodecyl benzene sulfonate.

[0063] Example 5 A foamed material, the preparation method of which is compared with that of Example 1, and the difference lies in that: In Step 1, the A component further includes, in parts by weight, 5 parts of inorganic nanoparticles, and the inorganic nanoparticles are silica particles, and the Dv50 particle size of the inorganic nanoparticles is 30 nm.

[0064] Example 6 A foamed material, the preparation method of which is compared with example 1, the difference is that: In step 1, the A component further includes inorganic nanoparticles 3 parts by weight, the inorganic nanoparticles are silica particles, and the Dv50 particle size of the inorganic nanoparticles is 30 nm.

[0065] Example 7 A foamed material, the preparation method of which is compared with example 1, the difference is that: In step 1, the A component further includes inorganic nanoparticles 7 parts by weight, the inorganic nanoparticles are silica particles, and the Dv50 particle size of the inorganic nanoparticles is 30 nm.

[0066] Example 8 A foamed material, the preparation method of which is compared with example 1, the difference is that: In step 1, the A component further includes inorganic nanoparticles 5 parts by weight, the inorganic nanoparticles are alumina particles, and the Dv50 particle size of the inorganic nanoparticles is 35 nm.

[0067] Example 9 A foamed material, the preparation method of which is compared with example 1, the difference is that: In step 1, the A component further includes inorganic nanoparticles 5 parts by weight, the inorganic nanoparticles are titanium dioxide particles, and the Dv50 particle size of the inorganic nanoparticles is 40 nm.

[0068] Example 10 A foamed material, the preparation method of which is compared with example 1, the difference is that: In step 1, the surfactant 1 part includes polyether modified trisiloxane (Tegostab B 8462, Evonik) 0.8 parts and sodium dodecyl benzene sulfonate 0.2 parts; the A component further includes inorganic nanoparticles 5 parts, the inorganic nanoparticles are silica particles, and the Dv50 particle size of the inorganic nanoparticles is 30 nm.

[0069] Comparative example 1 A foamed material, the preparation method of which is compared with example 1, the difference is that: In step 1, the A component and the B component are provided, the A component includes blowing agent 16.5 parts by weight, polyether polyol 100 parts, surfactant 1 part, and catalyst 0.8 parts, and the B component includes isocyanate 148 parts. wherein the blowing agent 16.5 parts by weight comprises cyclopentane (CP) 15 parts and isobutane (R600a) 1.5 parts, the surfactant 1 part comprises polyether-modified trisiloxane (Tegostab B 8462, Evonik) 1 part, and the catalyst 0.8 parts comprises dimethylcyclohexylamine (DMCHA) 0.44 parts and triethylenediamine (TEDA) 0.36 parts.

[0070] It can be seen that the difference between Comparative Example 1 and Example 1 is that the foamed material of Comparative Example 1 does not contain polytetrahydrofuran ether polyol.

[0071] Performance test: The foamed materials prepared according to the examples and comparative examples of the present application were tested, and the testing methods were as follows: Molded density (kg / m3): The molded density is the density of the foamed foam in the mold excluding the skin, which is determined according to ASTM D 1622-88. 3

[0072] Tensile strength (MPa): Determined according to GB / T 9641-2008 "Determination of tensile properties of rigid foamed plastics".

[0073] Thermal conductivity (mW / m·K): Determined according to ISO 12939-01 / DIN 52612, using an EKO HC-074-200 thermal conductivity instrument at an average temperature of 10°C (upper plate 2°C, lower plate 18°C). The foam samples were cut from the center of the molded part 24 hours after the foam was prepared, and the samples were measured immediately after cutting.

[0074] Shrinkage rate: First, the initial volume of the foam was tested by the drainage method, and the foam was placed in a sealed container, and the pressure was gradually increased to 1 bar, and the duration was 30 min. The volume of the foam was tested again by the drainage method, and the change rate of the volume before and after the two measurements was compared. The greater the change rate, the lower the strength of the foam and the greater the deformation.

[0075] Average cell diameter (μm): The microstructure of the foam section was observed by microscope, and the bubble diameter was measured by combining image analysis software.

[0076] Dimensional change rate at 50°C (%): Determined according to GB / T 8811-2008 "Test method for dimensional stability of rigid foamed plastics".

[0077] The test results are shown in Table 1.

[0078] Table 1

[0079] As can be seen from Table 1: ​The tensile strength of the foamed materials of Examples 1-10 is greater than that of the foamed material of Comparative Example 1, indicating that the foamed materials prepared in Examples 1-10 have better mechanical properties.

[0080] The shrinkage of the foamed materials of Examples 1-10 is lower than that of the foamed material of Comparative Example 1, indicating that the foamed materials prepared in Examples 1-10 have better dimensional stability.

[0081] The thermal conductivity of the foamed materials of Examples 1-10 is lower than that of the foamed material of Comparative Example 1, indicating that the foamed materials of Examples 1-10 have better heat insulation performance.

[0082] The average cell diameter of the foamed materials of Examples 1-10 is lower than that of the foamed material of Comparative Example 1, indicating that the foamed materials of Examples 1-10 have smaller cells.

[0083] The dimensional change rate at 50 DEG C of the foamed materials of Examples 1-10 is lower than that of the foamed material of Comparative Example 1, indicating that the foamed materials of Examples 1-10 have better high temperature resistance.

[0084] The foamed materials, the preparation method thereof, and the refrigeration device provided in the present application are described in detail above. The principles and implementation manners of the present application are described by applying specific examples in this paper, and the above examples are only used to help understand the present application. Meanwhile, for those skilled in the art, the specific implementation manners and application ranges will be changed according to the idea of the present application, and the above description should not be understood as limiting the present application.

Claims

1. A foamed material, characterized in that, The A component includes a blowing agent 15-18 parts by weight, a polyether polyol 93-97 parts by weight, a polytetrahydrofuran ether polyol 3-7 parts by weight, a surfactant 0.8-1.2 parts by weight, and a catalyst 0.6-1 part by weight; and the B component includes an isocyanate 145-151 parts by weight.

2. The foamed material of claim 1, wherein, The polyether polyol is polymerized from a starter and an alkylene oxide; and / or, The surfactant includes at least one of a non-ionic surfactant and an anionic surfactant.

3. The foamed material of claim 2, wherein, The starter includes at least one of an alcohol starter and an amine starter, and the alkylene oxide includes at least one of ethylene oxide, propylene oxide, and butylene oxide; and / or, The surfactant includes a non-ionic surfactant and an anionic surfactant, and the mass ratio of the non-ionic surfactant to the anionic surfactant is (3-5) :

1.

4. The foamed material of claim 3, wherein, The non-ionic surfactant includes at least one of a polyether-modified trisiloxane and a polyoxyethylene-polyoxypropylene block polyether siloxane; and / or, The anionic surfactant includes at least one of an alkyl benzene sulfonate, an alpha-olefin sulfonate, and a fatty alcohol polyoxyethylene ether sulfate.

5. The foamed material of claim 1, wherein, The catalyst includes an amine catalyst; and / or, The blowing agent includes an alkane blowing agent.

6. The foamed material of claim 5, wherein, The amine catalyst is a tertiary amine catalyst, and the tertiary amine catalyst includes at least one of dimethylcyclohexylamine, triethylenediamine, and pentamethyldiethylene triamine; and / or, The alkane blowing agent includes at least one of C3-C10 alkane.

7. The foamed material according to any one of claims 1-6, characterized in that, The A component further includes inorganic nanoparticles 3-7 parts by weight, and the inorganic nanoparticles have a Dv50 particle size of 10-50 nm.

8. The foamed material of claim 7, wherein, The inorganic nanoparticles include at least one of silica particles, alumina particles, and titanium dioxide particles.

9. A process for the preparation of a foamed material, characterized in that, The preparation method includes: providing an A component and a B component, the A component including a blowing agent 15-18 parts by weight, a polyether polyol 93-97 parts by weight, a polytetrahydrofuran ether polyol 3-7 parts by weight, a surfactant 0.8-1.2 parts by weight, and a catalyst 0.6-1 part by weight, and the B component including an isocyanate 145-151 parts by weight; mixing the A component and the B component to obtain a mixture, and polymerizing and foaming the mixture to obtain a foamed material.

10. A refrigeration apparatus characterized by comprising: The thermal insulation layer includes the foamed material of any one of claims 1-8 or the foamed material prepared by the preparation method of claim 9.

Images