CN110872489A - Phase-change hot melt adhesive and preparation method thereof - Google Patents
Phase-change hot melt adhesive and preparation method thereof Download PDFInfo
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- CN110872489A CN110872489A CN201911222172.2A CN201911222172A CN110872489A CN 110872489 A CN110872489 A CN 110872489A CN 201911222172 A CN201911222172 A CN 201911222172A CN 110872489 A CN110872489 A CN 110872489A
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- C09K5/06—Materials undergoing a change of physical state when used the change of state being from liquid to solid or vice versa
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- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K5/00—Heat-transfer, heat-exchange or heat-storage materials, e.g. refrigerants; Materials for the production of heat or cold by chemical reactions other than by combustion
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Abstract
The phase change hot melt adhesive comprises the following components in parts by weight: 20-50 parts of EVA hot melt adhesive and 10-70 parts of phase change material; the phase-change material is graphite adsorption phase-change energy storage powder or aerogel adsorption phase-change energy storage powder; the properties of the obtained phase-change hot melt adhesive are as follows: the specific heat capacity (J/(g.K)) > is more than or equal to 1.5; the phase change enthalpy (J/g) is about 30-180, namely the heat absorption value; the phase transition temperature (DEG C) is 5-90; specific gravity (g/cc): 0.8 to 1.8; the heat conductivity coefficient is 0.5-3.0W; the phase-change latent heat is released through the phase-change material, and the phase-change hot melt adhesive adopting the formula has excellent heat storage and temperature control performance.
Description
Technical Field
The invention relates to the technical field of glue and a preparation method thereof, in particular to phase-change hot melt glue and a preparation method thereof.
Background
The Chinese invention patent with the patent number of 201410030353.6, namely 'hot melt adhesive composition and preparation method thereof, hot melt adhesive heat conducting sheet and preparation method thereof' comprises 6-9 parts by weight of thermoplastic resin; the softening point of the thermoplastic resin is between 85 and 120 ℃; 0.40-0.60 parts by weight of a tackifier; 73-110 parts by weight of heat-conducting particles, because the softening point temperature of the thermoplastic resin is higher, the softening point temperature of the prepared hot melt adhesive composition is also higher, and further, the heat-conducting sheet made of the hot melt adhesive composition can not flow or deform at the normal use temperature. The defect that the heat conducting fins in the prior art are easy to flow and deform is overcome.
Among the types of thermal interface materials, phase change materials are increasingly favored by professional designers as materials with superior characteristics, such as high heat transfer efficiency and long service life. The phase change energy storage technology is a technology capable of storing energy in a phase change latent heat mode in a high density mode, at present, a phase change material is usually added into a phase change hot melt adhesive, but the phase change material is good in mobility and easy to overflow under the heating condition, so that oil is produced, and the general expression is that a layer of oil appears on the surface of a product, which causes poor quality and cannot meet the requirements of customers on the quality.
Disclosure of Invention
One of the objectives of the present invention is to provide a phase change hot melt adhesive to solve the deficiencies of the prior art.
The invention also aims to provide a preparation method of the phase-change hot melt adhesive.
In order to achieve the purpose, the invention adopts the following technical scheme:
the phase change hot melt adhesive comprises the following components in parts by weight:
10-50 parts of hot melt adhesive and 10-70 parts of phase change material; the phase-change material is graphite adsorption phase-change energy storage powder or aerogel adsorption phase-change energy storage powder.
Specifically, the heat-conducting coating material further comprises 10-70 parts of heat-conducting filler, wherein the heat-conducting filler is any one or a mixture of more of aluminum oxide, aluminum nitride, boron nitride, silicon carbide, graphite powder, carbon nano tubes and graphene, and the hot melt adhesive is an EVA hot melt adhesive.
Specifically, the graphite adsorption phase change energy storage powder comprises the following components in parts by weight:
100 parts of phase change powder and 5-9 parts of vermicular expanded graphite.
Specifically, the expansion rate of the vermicular expanded graphite is 600ml/g, the granularity is 200 meshes in 100 meshes, the expansion multiple is 600 times in 200 meshes, and the bulk density is 0.2-0.5 g/cm 3.
Specifically, the aerogel adsorption phase-change energy storage powder comprises the following components in parts by weight:
100 parts of phase-change powder and 5-50 parts of aerogel.
Specifically, the aerogel has the specific surface area of 100 square meters per gram and the particle size of 5-60 nm.
Specifically, the phase-change powder is selected from any one or a combination of several of alkane wax, paraffin, fatty acid, PE wax and PP wax, and the alkane wax has an alkane carbon atom number of 10-60.
The preparation method of the phase-change hot melt adhesive comprises the following steps:
step 1, preparing a phase-change material, wherein the phase-change material is graphite adsorption phase-change energy storage powder or aerogel adsorption phase-change energy storage powder;
step 2, melting the hot melt adhesive: heating the hot melt adhesive at the temperature of 80-180 ℃ for 10-60 min to completely melt the hot melt adhesive, adding the phase change material, and stirring at high speed for 30-60 min to obtain a finished product.
The preparation method of the graphite adsorption phase change energy storage powder comprises the following steps:
step 1, weighing each component according to a formula;
step 2, placing the phase change powder in a reaction kettle, heating until the phase change powder is completely melted, then slowly heating the vermicular expanded graphite into the liquid phase change powder in batches, stirring while performing variable heating, vacuumizing the reaction kettle after the vermicular expanded graphite is added, wherein the vacuum degree is between-0.04 and-0.10 MPa, the vacuumizing time lasts for 5 to 40min, and the stirring time lasts for 15 to 90 min;
and 3, taking out the graphite adsorption phase-change energy storage powder obtained by the treatment in the step 2, cooling to normal temperature, crushing by using a crusher, and sieving by using a sieve of 10-100 meshes to obtain the graphite adsorption phase-change energy storage powder.
The preparation method of the aerogel adsorption phase-change energy storage powder comprises the following steps:
step 1, weighing each component according to a formula;
step 2, heating the phase-change powder in a reaction kettle until the phase-change powder is completely melted, then slowly heating the aerogel in batches into the liquid phase-change powder, stirring while performing phase-change heating, vacuumizing the reaction kettle after the aerogel is added, wherein the vacuum degree is-0.04 to-0.10 MPa, the vacuumizing time lasts for 5 to 40min, and the stirring time lasts for 15 to 90 min;
and 3, taking out the aerogel adsorption phase-change energy storage powder obtained by the treatment in the step 2, cooling to normal temperature, crushing by using a crusher, and sieving by using a sieve of 10-100 meshes to obtain the aerogel adsorption phase-change energy storage powder.
Compared with the prior art, the phase change hot melt adhesive has the following beneficial effects: the phase change hot melt adhesive has the following properties: the specific heat capacity (J/(g.K)) > is more than or equal to 1.5; the phase change enthalpy (J/g) is about 30-180, namely the heat absorption value; the phase transition temperature (DEG C) is 5-90; specific gravity (g/cc): 0.8 to 1.8, and the heat conductivity coefficient is 0.5 to 3.0W/mk; the phase-change material is graphite adsorption phase-change energy storage powder or aerogel adsorption phase-change energy storage powder;
the graphite adsorption phase-change energy storage powder adopts vermicular expanded graphite as an adsorption material, the vermicular expanded graphite is a loose and porous vermicular substance obtained by intercalating, washing, drying and high-temperature expanding natural crystalline flake graphite, the expanded graphite has the excellent performances of cold and heat resistance, corrosion resistance, self-lubrication, radiation resistance, conductivity and the like of the natural graphite, and also has the characteristics of softness, compression resilience, adsorptivity, ecological environment harmony, biocompatibility, radiation resistance and the like which are not possessed by the natural graphite, and the vermicular expanded graphite is loose and porous and has a large specific surface area, so that the adsorption capacity on the phase-change powder is very strong, the phase-change material can be adsorbed only by adopting a small amount of vermicular expanded graphite, and certainly, the vermicular expanded graphite cannot be too little and cannot completely adsorb the phase-change material; the amount of the vermicular expanded graphite is not too large, so that the cost is increased, the enthalpy of the product is reduced, the phase change enthalpy of the phase change energy storage powder adsorbed by the graphite is reduced, and the heat storage performance of the product is reduced, so that the weight ratio of completely adsorbing the phase change powder is optimal for different powders;
the heat-conducting powder is added into the components, so that the heat-storage encapsulating material has excellent heat-conducting property;
in order to further reduce the usage amount of the vermicular expanded graphite, in the step 2 of the preparation method, a vacuum adsorption process is adopted, the stirring is carried out under the vacuum condition, the melted phase-change powder can more easily and deeply permeate into the fluffy deep hole of the vermicular expanded graphite, the adsorption effect on the phase-change material in the deep hole is far greater than that of the conventional impregnation or stirring, the phase-change material is difficult to overflow under the high-temperature condition after entering the deep hole and has the supernormal adsorption performance, so that the vermicular expanded graphite as few as possible adsorbs more phase-change materials, the phase-change enthalpy of the graphite adsorption phase-change energy storage powder is increased by 5-10 percent, the performance is greatly improved, and the cost is greatly reduced due to the reduction of the usage amount of the vermicular expanded graphite;
the aerogel adsorption phase-change energy storage powder selects aerogel as an adsorption material, the aerogel is low in heat conductivity coefficient, good in heat preservation and insulation effect, stable in physical and chemical properties, non-combustible at high temperature, completely waterproof, non-toxic, green and environment-friendly, large in specific surface area and very strong in adsorption capacity to the phase-change powder, the phase-change material can be adsorbed only by adopting a small amount of aerogel in parts by weight, and certainly, the aerogel cannot be too little and cannot completely adsorb the phase-change material; the aerogel can not be too much, so that the cost and the weight of the product are increased on one hand, the phase change enthalpy of the phase change energy storage powder adsorbed by the aerogel is reduced, and the heat storage performance of the product is reduced, therefore, the weight ratio of the phase change powder just completely adsorbed by different phase change powders is optimal;
in order to further reduce the usage amount of the aerogel, in step 2 of the preparation method, a vacuum adsorption process is adopted, stirring is carried out under a vacuum condition, the melted phase-change powder can more easily and deeply permeate into the fluffy deep hole of the aerogel, the adsorption effect on the phase-change material in the deep hole is far greater than that of conventional impregnation or stirring, after the phase-change material enters the deep hole, the phase-change material is difficult to overflow under a high-temperature condition, and the phase-change material has extraordinary adsorption performance, so that the aerogel as few as possible adsorbs more phase-change materials, the density of the aerogel adsorption phase-change energy storage powder is improved by 10-15%, the phase-change enthalpy of the aerogel adsorption phase-change energy storage powder is increased by about 5-15%, the performance is greatly improved, and the cost is greatly reduced due to the reduction of the usage amount of.
The phase-change hot melt adhesive prepared by the formula and the preparation method has excellent heat storage and temperature control performance, can be widely applied to heat conduction and heat dissipation and heat storage and temperature control of batteries, and prolongs the service life of the batteries.
Detailed Description
The present invention will be further described with reference to the following examples, which are preferred embodiments of the present invention.
Example 1
The phase change hot melt adhesive comprises the following components in parts by weight: the heat-insulation material comprises 20 parts of EVA hot melt adhesive and 30 parts of phase change material, wherein the phase change material is graphite adsorption phase change energy storage powder, and the graphite adsorption phase change energy storage powder comprises the following components in parts by weight: 100 parts of paraffin and 5 parts of vermicular expanded graphite, wherein the vermicular expanded graphite has the expansion rate of 500ml/g, the granularity of 100 meshes, the expansion multiple of 400 times and the bulk density of 0.2g/cm3。
Example 2
The phase change hot melt adhesive comprises the following components in parts by weight: 50 parts of EVA hot melt adhesive and 70 parts of phase change material, wherein the phase change material is graphite adsorption phase change energy storage powder, and the graphite adsorption phase change energy storage powder comprises the following components in parts by weight: 100 parts of paraffin and 9 parts of vermicular expanded graphite, wherein the vermicular expanded graphite has the expansion rate of 600ml/g, the granularity of 200 meshes, the expansion multiple of 600 times and the bulk density of 0.5g/cm3。
Example 3
The phase change hot melt adhesive comprises the following components in parts by weight: 30 parts of EVA hot melt adhesive and 40 parts of phase change material, wherein the phase change material is graphite adsorption phase change energy storage powder, and the graphite adsorption phase change energy storage powder comprises the following components in parts by weight: 100 parts of fatty acid and 6 parts of vermicular expanded graphite, wherein the vermicular expanded graphite has the expansion rate of 100ml/g, the granularity of 150 meshes, the expansion multiple of 500 times and the bulk density of 0.3g/cm3。
Example 4
The phase change hot melt adhesive comprises the following components in parts by weight: 34 parts of EVA hot melt adhesive and 50 parts of phase change material, wherein the phase change material is graphite adsorption phase change energy storage powder, and the graphite adsorption phase change energy storage powder comprises the following components in parts by weight: 100 parts of PE wax and 7 parts of vermicular expanded graphite, wherein the vermicular expanded graphite has the expansion rate of 520ml/g, the granularity of 120 meshes, the expansion multiple of 450 times and the bulk density of 0.2g/cm3。
Example 5
The phase-change hot melt adhesive comprises the following components in parts by weightThe components are as follows: 45 parts of EVA hot melt adhesive and 45 parts of phase change material, wherein the phase change material is graphite adsorption phase change energy storage powder, and the graphite adsorption phase change energy storage powder comprises the following components in parts by weight: 100 parts of PP wax and 8 parts of vermicular expanded graphite, wherein the vermicular expanded graphite has the expansion rate of 550ml/g, the granularity of 140 meshes, the expansion multiple of 460 times and the bulk density of 0.2g/cm3。
Example 6
The phase change hot melt adhesive comprises the following components in parts by weight: 25 parts of EVA hot melt adhesive and 35 parts of phase change material, wherein the phase change material is graphite adsorption phase change energy storage powder, and the graphite adsorption phase change energy storage powder comprises the following components in parts by weight: 100 parts of C40 alkane wax and 8.5 parts of vermicular expanded graphite, wherein the vermicular expanded graphite has the expansion rate of 570ml/g, the granularity of 200 meshes, the expansion multiple of 600 times and the bulk density of 0.3g/cm3。
Example 7
The phase change hot melt adhesive comprises the following components in parts by weight: 30 parts of EVA hot melt adhesive, 30 parts of carbon nano tube and 40 parts of phase change material, wherein the phase change material is graphite adsorption phase change energy storage powder, and the graphite adsorption phase change energy storage powder comprises the following components in parts by weight: 100 parts of C30 alkane wax and 8.8 parts of vermicular expanded graphite, wherein the vermicular expanded graphite has the expansion rate of 500ml/g, the granularity of 100 meshes, the expansion multiple of 400 times and the bulk density of 0.4g/cm3。
Example 8
The phase change hot melt adhesive comprises the following components in parts by weight: 35 parts of EVA hot melt adhesive, 20 parts of carbon nano tube and 45 parts of phase change material, wherein the phase change material is graphite adsorption phase change energy storage powder, and the graphite adsorption phase change energy storage powder comprises the following components in parts by weight: 100 parts of C20 alkane wax and 7.3 parts of vermicular expanded graphite, wherein the vermicular expanded graphite has the expansion rate of 600ml/g, the granularity of 200 meshes, the expansion multiple of 600 times and the bulk density of 0.2g/cm3。
Example 9
The phase change hot melt adhesive comprises the following components in parts by weight: 40 parts of EVA hot melt adhesive, 40 parts of carbon nano tube and phase change50 parts of a material, wherein the phase-change material is graphite adsorption phase-change energy storage powder, and the graphite adsorption phase-change energy storage powder comprises the following components in parts by weight: 100 parts of C10 alkane wax and 7.3 parts of vermicular expanded graphite, wherein the vermicular expanded graphite has the expansion rate of 600ml/g, the granularity of 200 meshes, the expansion multiple of 600 times and the bulk density of 0.35g/cm3。
Example 10
The phase change hot melt adhesive comprises the following components in parts by weight: 45 parts of EVA hot melt adhesive, 35 parts of carbon nano tube and 55 parts of phase change material, wherein the phase change material is graphite adsorption phase change energy storage powder, and the graphite adsorption phase change energy storage powder comprises the following components in parts by weight: 100 parts of C60 alkane wax and 6.2 parts of vermicular expanded graphite, wherein the vermicular expanded graphite has the expansion rate of 500ml/g, the granularity of 150 meshes, the expansion multiple of 400 times and the bulk density of 0.25g/cm3。
Example 11
The phase change hot melt adhesive comprises the following components in parts by weight: 50 parts of EVA hot melt adhesive, 20 parts of methyltrimethoxysilane, 1.8 parts of dibutyl tin dilaurate, 15 parts of boron nitride and 70 parts of phase change material, wherein the phase change material is graphite adsorption phase change energy storage powder and graphite adsorption phase change energy storage powder, and comprises the following components in parts by weight: 100 parts of C35 alkane wax and 5.8 parts of vermicular expanded graphite, wherein the vermicular expanded graphite has the expansion rate of 600ml/g, the granularity of 200 meshes, the expansion multiple of 600 times and the bulk density of 0.35g/cm3。
Example 12
The phase change hot melt adhesive comprises the following components in parts by weight: EVA hot melt adhesive 20 parts, magnesium oxide 35 parts and phase change material 30 parts, wherein, phase change material adsorbs phase change energy storage powder for the aerogel, the aerogel adsorbs phase change energy storage powder, includes each component of following part by weight: 100 parts of C10 paraffin wax and 50 parts of aerogel, wherein the aerogel has a specific surface area of 300 square meters per gram and a particle size of 5 nm.
Example 13
The phase change hot melt adhesive comprises the following components in parts by weight: 45 parts of EVA hot melt adhesive, 15 parts of silicon carbide and 65 parts of phase change material, wherein the phase change material is aerogel adsorption phase change energy storage powder, the aerogel adsorption phase change energy storage powder comprises the following components in parts by weight: 100 parts of C15 paraffin wax and 45 parts of aerogel, wherein the aerogel has a specific surface area of 280 square meters per gram and a particle size of 8 nm.
Example 14
The phase change hot melt adhesive comprises the following components in parts by weight: 28 parts of EVA hot melt adhesive, 45 parts of silicon carbide and 35 parts of phase change material, wherein, the phase change material is aerogel adsorption phase change energy storage powder, the aerogel adsorption phase change energy storage powder comprises the following components in parts by weight: 100 parts of C20 paraffin wax and 40 parts of aerogel, wherein the aerogel has a specific surface area of 220 square meters per gram and a particle size of 15 nm.
Example 15
The phase change hot melt adhesive comprises the following components in parts by weight: 33 parts of EVA hot melt adhesive, 25 parts of silicon carbide and 52 parts of phase-change material, wherein the phase-change material is aerogel adsorption phase-change energy storage powder, the aerogel adsorption phase-change energy storage powder comprises the following components in parts by weight: 100 parts of C30 paraffin wax and 45 parts of aerogel, wherein the aerogel has a specific surface area of 260 square meters per gram and a particle size of 12 nm.
Example 16
The preparation method of the phase-change hot melt adhesive of examples 1 to 11, comprising the steps of:
step 1, preparing a phase-change material, wherein the phase-change material is graphite adsorption phase-change energy storage powder;
step 2, melting the hot melt adhesive: and heating the hot melt adhesive at the temperature of 8 ℃ for 60min to completely melt the hot melt adhesive, adding the phase change material and the heat conduction filler, and stirring at a high speed for 60min to obtain a finished product.
The preparation method of the graphite adsorption phase change energy storage powder in the step 1 comprises the following steps:
step 1, weighing each component according to a formula;
step 2, placing the phase change powder in a reaction kettle, heating until the phase change powder is completely melted, then slowly heating the vermicular expanded graphite into the liquid phase change powder in batches, stirring while performing variable heating, vacuumizing the reaction kettle after the vermicular expanded graphite is added, wherein the vacuum degree is between-0.04 and-0.10 MPa, the vacuumizing time lasts for 5 to 40min, and the stirring time lasts for 15 to 90 min;
and 3, taking out the graphite adsorption phase-change energy storage powder obtained by the treatment in the step 2, cooling to normal temperature, crushing by using a crusher, and sieving by using a sieve of 10-100 meshes to obtain the graphite adsorption phase-change energy storage powder.
Example 17
The method of preparing the phase change hot melt adhesive of examples 12-15, comprising the steps of:
step 1, preparing a phase-change material, wherein the phase-change material is aerogel adsorption phase-change energy storage powder;
step 2, melting the hot melt adhesive: and heating the hot melt adhesive at the temperature of 180 ℃ for 10min to completely melt the hot melt adhesive, adding the phase change material and the heat conduction filler, and stirring at a high speed for 30min to obtain a finished product.
The preparation method of the aerogel adsorption phase-change energy storage powder in the step 1 comprises the following steps:
step 1, weighing each component according to a formula;
step 2, heating the phase-change powder in a reaction kettle until the phase-change powder is completely melted, then slowly heating the aerogel in batches into the liquid phase-change powder, stirring while performing phase-change heating, vacuumizing the reaction kettle after the aerogel is added, wherein the vacuum degree is-0.04 to-0.10 MPa, the vacuumizing time lasts for 5 to 40min, and the stirring time lasts for 15 to 90 min;
and 3, taking out the aerogel adsorption phase-change energy storage powder obtained by the treatment in the step 2, cooling to normal temperature, crushing by using a crusher, and sieving by using a sieve of 10-100 meshes to obtain the aerogel adsorption phase-change energy storage powder.
The phase change hot melt adhesives of examples 1 to 15 have the following performance (0.1mm) at the same environmental temperature, as shown in table 1:
TABLE 1
TABLE 2
As can be seen from the data in tables 1-2, the phase-change hot melt adhesive of the invention contains a proper amount of phase-change material, and the specific heat capacity (J/(g.K)) > 1.5; the phase change enthalpy (J/g) is about 30-180, namely the heat absorption value; the phase transition temperature (DEG C) is 5-90; specific gravity (g/cc): 0.8-1.8, and the heat conductivity coefficient is 0.5-3.0W/mk, and the heat-storage and temperature-control hot melt adhesive has excellent heat-storage and temperature-control functions and heat-conducting performance.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the protection scope of the present invention, although the present invention is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.
Claims (10)
1. The phase change hot melt adhesive is characterized by comprising the following components in parts by weight:
10-50 parts of hot melt adhesive and 10-70 parts of phase change material; the phase-change material is graphite adsorption phase-change energy storage powder or aerogel adsorption phase-change energy storage powder.
2. The phase-change hot melt adhesive according to claim 1, wherein: the heat-conducting composite material further comprises 10-70 parts of heat-conducting filler, wherein the heat-conducting filler is any one or a mixture of more of aluminum oxide, aluminum nitride, boron nitride, silicon carbide, graphite powder, carbon nano tubes and graphene, and the hot melt adhesive is EVA hot melt adhesive.
3. The phase-change hot melt adhesive according to claim 1, wherein: the graphite adsorption phase change energy storage powder comprises the following components in parts by weight:
100 parts of phase change powder and 5-9 parts of vermicular expanded graphite.
4. The phase-change hot melt adhesive according to claim 3, wherein: expansion of the vermicular expanded graphiteThe expansion rate is 100-600ml/g, the particle size is 100-200 meshes, the expansion ratio is 200-600 times, and the bulk density is 0.2-0.5 g/cm3。
5. The phase-change hot melt adhesive according to claim 1, wherein: the aerogel adsorption phase change energy storage powder comprises the following components in parts by weight:
100 parts of phase-change powder and 5-50 parts of aerogel.
6. The phase-change hot melt adhesive according to claim 5, wherein:
the aerogel has the specific surface area of 100 square meters per gram and the particle size of 5-60 nm.
7. The phase-change hot melt adhesive according to claim 3 or 6, wherein: the phase-change powder is selected from any one or combination of several of alkane wax, paraffin wax, fatty acid, PE wax and PP wax, wherein the alkane wax has alkane carbon atoms of 10-60.
8. The preparation method of the phase-change hot melt adhesive according to any one of claims 1 to 7, which is characterized by comprising the following steps:
step 1, preparing a phase-change material, wherein the phase-change material is graphite adsorption phase-change energy storage powder or aerogel adsorption phase-change energy storage powder;
step 2, melting the hot melt adhesive: heating the hot melt adhesive at the temperature of 80-180 ℃ for 10-60 min to completely melt the hot melt adhesive, adding the phase change material, and stirring at high speed for 30-60 min to obtain a finished product.
9. The preparation method of the phase-change hot melt adhesive according to claim 8, wherein the preparation method of the graphite adsorption phase-change energy storage powder comprises the following steps:
step 1, weighing each component according to a formula;
step 2, placing the phase change powder in a reaction kettle, heating until the phase change powder is completely melted, then slowly heating the vermicular expanded graphite into the liquid phase change powder in batches, stirring while performing variable heating, vacuumizing the reaction kettle after the vermicular expanded graphite is added, wherein the vacuum degree is between-0.04 and-0.10 MPa, the vacuumizing time lasts for 5 to 40min, and the stirring time lasts for 15 to 90 min;
and 3, taking out the graphite adsorption phase-change energy storage powder obtained by the treatment in the step 2, cooling to normal temperature, crushing by using a crusher, and sieving by using a sieve of 10-100 meshes to obtain the graphite adsorption phase-change energy storage powder.
10. The preparation method of the phase-change hot melt adhesive according to claim 8, wherein the preparation method of the aerogel adsorption phase-change energy storage powder comprises the following steps:
step 1, weighing each component according to a formula;
step 2, heating the phase-change powder in a reaction kettle until the phase-change powder is completely melted, then slowly heating the aerogel in batches into the liquid phase-change powder, stirring while performing phase-change heating, vacuumizing the reaction kettle after the aerogel is added, wherein the vacuum degree is-0.04 to-0.10 MPa, the vacuumizing time lasts for 5 to 40min, and the stirring time lasts for 15 to 90 min;
and 3, taking out the aerogel adsorption phase-change energy storage powder obtained by the treatment in the step 2, cooling to normal temperature, crushing by using a crusher, and sieving by using a sieve of 10-100 meshes to obtain the aerogel adsorption phase-change energy storage powder.
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| CN112877036A (en) * | 2021-01-26 | 2021-06-01 | 深圳市大通创新科技有限公司 | Phase change material and preparation method and application thereof |
| CN113511837A (en) * | 2021-07-27 | 2021-10-19 | 广州恩沣新材料科技有限公司 | Aerogel EVA composite heat-insulating material and preparation method thereof |
| CN114716976A (en) * | 2020-12-22 | 2022-07-08 | 佛山市顺德区美的电热电器制造有限公司 | Composite phase change material, container assembly and preparation method of composite phase change material |
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| CN109486473A (en) * | 2019-01-23 | 2019-03-19 | 深圳航美新材料科技有限公司 | A kind of multi-functional phase change composite material and preparation method thereof |
| CN110205100A (en) * | 2019-05-16 | 2019-09-06 | 同济大学 | Graphene oxide/expanded graphite aeroge phase change composite material and preparation method thereof |
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| CN114716976A (en) * | 2020-12-22 | 2022-07-08 | 佛山市顺德区美的电热电器制造有限公司 | Composite phase change material, container assembly and preparation method of composite phase change material |
| CN114716976B (en) * | 2020-12-22 | 2024-05-31 | 佛山市顺德区美的电热电器制造有限公司 | Composite phase change material, container assembly and preparation method of composite phase change material |
| CN112877036A (en) * | 2021-01-26 | 2021-06-01 | 深圳市大通创新科技有限公司 | Phase change material and preparation method and application thereof |
| CN113511837A (en) * | 2021-07-27 | 2021-10-19 | 广州恩沣新材料科技有限公司 | Aerogel EVA composite heat-insulating material and preparation method thereof |
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