CN110951445A - Single-component heat storage encapsulating material and preparation method thereof - Google Patents

Single-component heat storage encapsulating material and preparation method thereof Download PDF

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CN110951445A
CN110951445A CN201911298664.XA CN201911298664A CN110951445A CN 110951445 A CN110951445 A CN 110951445A CN 201911298664 A CN201911298664 A CN 201911298664A CN 110951445 A CN110951445 A CN 110951445A
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phase
parts
change
powder
energy storage
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张立强
张彦兵
杨小玉
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    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J183/00—Adhesives based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon, with or without sulfur, nitrogen, oxygen, or carbon only; Adhesives based on derivatives of such polymers
    • C09J183/04—Polysiloxanes
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
    • C09J11/02—Non-macromolecular additives
    • C09J11/04—Non-macromolecular additives inorganic
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
    • C09J11/02—Non-macromolecular additives
    • C09J11/06—Non-macromolecular additives organic
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
    • C09J11/08—Macromolecular additives
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • 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
    • C09K5/02—Materials undergoing a change of physical state when used
    • C09K5/06—Materials undergoing a change of physical state when used the change of state being from liquid to solid or vice versa
    • C09K5/063—Materials absorbing or liberating heat during crystallisation; Heat storage materials
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
    • C08K3/20—Oxides; Hydroxides
    • C08K3/22—Oxides; Hydroxides of metals
    • C08K2003/2217—Oxides; Hydroxides of metals of magnesium
    • C08K2003/222—Magnesia, i.e. magnesium oxide
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/38—Boron-containing compounds
    • C08K2003/382—Boron-containing compounds and nitrogen
    • C08K2003/385—Binary compounds of nitrogen with boron

Abstract

The single-component heat storage encapsulating material comprises the following components in parts by weight: 20-50 parts of hydroxyl silicone resin, 0.5-20 parts of curing agent, 0.1-2 parts of catalyst and 30-70 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, and the obtained single-component heat storage encapsulating material has the following properties: the specific heat capacity (J/(g.K)) > is more than or equal to 2.0; the phase change enthalpy (J/g) is about 30-180, namely the heat absorption value; the phase transition temperature (DEG C) is 25-90; specific gravity (g/cc): 0.8-1.8 surface drying time: 5 min-10 min; curing time: 1 h-2 h; the complete curing time is more than or equal to 24 hours; the phase-change latent heat is released through the phase-change material, and the single-component heat-storage encapsulating material adopting the formula has excellent heat-storage and temperature-control performance.

Description

Single-component heat storage encapsulating material and preparation method thereof
Technical Field
The invention relates to the technical field of encapsulating materials and preparation methods thereof, in particular to a single-component heat storage encapsulating material and a preparation method thereof.
Background
The electronic pouring sealant is liquid before being cured, has fluidity, and the viscosity of the glue solution is different according to the material, the performance and the production process of the product. The pouring sealant can realize the use value after being completely cured, and can play the roles of water resistance, moisture resistance, dust prevention, insulation, heat conduction, confidentiality, corrosion resistance, temperature resistance and shock resistance after being cured. However, the conventional electronic pouring sealant does not have the functions of heat storage and temperature control, and has higher cost.
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 an encapsulating material, but the phase change material is good in mobility and easy to overflow under the heating condition, so that oil is produced, and the common 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 single-component heat storage potting material to solve the deficiencies of the prior art.
The invention also aims to provide a preparation method of the single-component heat storage encapsulating material.
In order to achieve the purpose, the invention adopts the following technical scheme:
the single-component heat storage encapsulating material comprises the following components in parts by weight:
20-50 parts of hydroxyl silicone resin, 0.5-20 parts of curing agent, 0.1-2 parts of catalyst and 30-70 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 coating material further comprises 10-70 parts of heat-conducting powder, wherein the heat-conducting powder is any one or a mixture of several of aluminum oxide, aluminum nitride, boron nitride, silicon carbide, graphite powder, carbon nano tubes and graphene, the curing agent is any one or a combination of several of methyltrimethoxysilane, methyltriethoxysilane, ethyl orthosilicate and methyl orthosilicate, and the catalyst is any one of dibutyltin dilaurate, stannous octoate and 1, 3-phenylenedioxy bis (ethyl acetoacetate) titanium.
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 single-component heat storage encapsulating material 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, mixing: putting the hydroxyl silicone resin and the phase change material into a vacuum kneader, stirring for 0.5-2 hours at the temperature of 80-150 ℃ and the vacuum degree of-0.04-0.10 MPa, and uniformly kneading to obtain a base material for later use.
Step 3, stirring: and (3) placing the base material in the step (2) into a planetary stirrer, adding a curing agent and a catalyst, stirring for 0.5-1.5 hours at a vacuum degree of-0.04-0.10 MPa at a speed of 30 revolutions per minute, and uniformly stirring.
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 single-component heat storage encapsulating material has the following beneficial effects: the single-component heat storage encapsulating material disclosed by the invention has the following properties: the specific heat capacity (J/(g.K)) > is more than or equal to 2.0; the phase change enthalpy (J/g) is about 30-180, namely the heat absorption value; the phase transition temperature (DEG C) is 25-90; specific gravity (g/cc): 0.8-1.8 surface drying time: 5 min-10 min; curing time: 1 h-2 h; the complete curing time is more than or equal to 24 hours; 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 single-component heat storage encapsulating material adopting the formula and the preparation method has excellent heat storage and temperature control performance.
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 single-component heat storage encapsulating material comprises the following components in parts by weight: 20 parts of hydroxyl silicone resin, 0.5 part of methyl trimethoxy silane, 0.1 part of dibutyl tin dilaurate 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 single-component heat storage encapsulating material comprises the following components in parts by weight: 50 parts of hydroxyl silicone resin, 20 parts of methyltrimethoxysilane, 0.2 part of dibutyl tin dilaurate 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 expansion rate of the vermicular expanded graphite is 600ml/g, the granularity is 200 meshes, and the expansion multiple is600 times, and the bulk density is 0.5g/cm3。
Example 3
The single-component heat storage encapsulating material comprises the following components in parts by weight: 30 parts of hydroxyl silicone resin, 5 parts of methyltriethoxysilane, 0.1 part of stannous octoate 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 single-component heat storage encapsulating material comprises the following components in parts by weight: 34 parts of hydroxyl silicone resin, 12 parts of methyltrimethoxysilane, 0.3 part of 1, 3-phenylenedioxy bis (ethyl acetoacetate) titanium 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 single-component heat storage encapsulating material comprises the following components in parts by weight: 45 parts of hydroxyl silicone resin, 8 parts of methyltrimethoxysilane, 0.1 part of dibutyl tin dilaurate 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 single-component heat storage encapsulating material comprises the following components in parts by weight: 25 parts of hydroxyl silicone resin, 5.5 parts of methyltrimethoxysilane, 0.1 part of dibutyl tin dilaurate and 35 parts of phase-change material, wherein the phase-change materialThe 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 single-component heat storage encapsulating material comprises the following components in parts by weight: 30 parts of hydroxyl silicone resin, 8.5 parts of methyltrimethoxysilane, 1 part of dibutyl tin dilaurate, 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 single-component heat storage encapsulating material comprises the following components in parts by weight: 35 parts of hydroxyl silicone resin, 10 parts of methyltrimethoxysilane, 2 parts of dibutyl tin dilaurate, 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 single-component heat storage encapsulating material comprises the following components in parts by weight: 40 parts of hydroxyl silicone resin, 12.5 parts of methyltrimethoxysilane, 0.3 part of dibutyl tin dilaurate, 40 parts of carbon nano tube 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 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 single-component heat storage encapsulating material comprises the following components in parts by weight: 45 parts of hydroxyl silicone resin, 14.5 parts of methyltrimethoxysilane, 0.5 part of dibutyl tin dilaurate, 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 single-component heat storage encapsulating material comprises the following components in parts by weight: 50 parts of hydroxyl silicone resin, 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 single-component heat storage encapsulating material comprises the following components in parts by weight: 20 parts of hydroxyl silicone resin, 0.5 part of methyl triethoxysilane, 0.2 part of dibutyl tin dilaurate, 35 parts of magnesium oxide and 30 parts of phase-change material, wherein the phase-change material is aerogel adsorption phase-change energy storage powder, and the aerogel adsorption phase-change energy storage powder comprises the following components in parts 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 single-component heat storage encapsulating material comprises the following components in parts by weight: 45 parts of hydroxyl silicon resin, 18 parts of methyltrimethoxysilane, 1.1 parts of dibutyl tin dilaurate, 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, and 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 single-component heat storage encapsulating material comprises the following components in parts by weight: 28 parts of hydroxyl silicon resin, 8 parts of methyltrimethoxysilane, 0.15 part of dibutyl tin dilaurate, 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, and 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 single-component heat storage encapsulating material comprises the following components in parts by weight: 33 parts of hydroxyl silicone resin, 14 parts of methyl triethoxysilane, 0.22 part of dibutyl tin dilaurate and 52 parts of phase-change material, wherein the phase-change material is aerogel adsorption phase-change energy storage powder, and 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 single-component heat storage potting material of embodiments 1 to 11 includes the following steps:
step 1, preparing a phase-change material, wherein the phase-change material is graphite adsorption phase-change energy storage powder;
step 2, mixing: putting the hydroxyl silicone resin and the phase change material into a vacuum kneader, stirring for 0.5-2 hours at the temperature of 80-150 ℃ and the vacuum degree of-0.04-0.10 MPa, and uniformly kneading to obtain a base material for later use.
Step 3, stirring: and (3) placing the base material in the step (2) into a planetary stirrer, adding a curing agent, heat-conducting powder and a catalyst, stirring for 0.5-1.5 hours at a vacuum degree of-0.04-0.10 MPa at a speed of 30 revolutions per minute, and uniformly stirring.
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 for preparing the single-component heat storage potting material of embodiments 12 to 15 includes the following steps:
step 1, preparing a phase-change material, wherein the phase-change material is aerogel adsorption phase-change energy storage powder;
step 2, mixing: putting the hydroxyl silicone resin and the phase change material into a vacuum kneader, stirring for 0.5-2 hours at the temperature of 80-150 ℃ and the vacuum degree of-0.04-0.10 MPa, and uniformly kneading to obtain a base material for later use.
Step 3, stirring: and (3) placing the base material in the step (2) into a planetary stirrer, adding methyltrimethoxysilane, heat-conducting powder and a catalyst, stirring for 0.5-1.5 hours at a vacuum degree of-0.04-0.10 MPa at a speed of 30 r/min, and uniformly stirring.
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 single-component heat storage encapsulating material of examples 1 to 15 has the following performance (0.1mm) at the same environmental temperature, as shown in table 1:
Figure BDA0002321296270000111
Figure BDA0002321296270000121
TABLE 1
Figure BDA0002321296270000122
TABLE 2
As can be seen from the data in tables 1 and 2, the single-component heat storage encapsulating material disclosed by the invention contains a proper amount of phase change material, and the specific heat capacity (J/(g.K)) > is more than or equal to 2.0; the phase change enthalpy (J/g) is about 30-180, namely the heat absorption value; the phase transition temperature (DEG C) is 25-90; specific gravity (g/cc): 0.8-1.8 surface drying time: 5 min-10 min; curing time: 1 h-2 h; the complete curing time is more than or equal to 24 hours, and the material is used as an encapsulating material and has excellent heat storage and temperature control functions.
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 single-component heat storage encapsulating material is characterized by comprising the following components in parts by weight:
20-50 parts of hydroxyl silicone resin, 0.5-20 parts of curing agent, 0.1-2 parts of catalyst and 30-70 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 single-component heat-storage potting material of claim 1, wherein: the heat-conducting material also comprises 10-70 parts of heat-conducting powder, wherein the heat-conducting powder is any one or a mixture of more than one of aluminum oxide, aluminum nitride, boron nitride, silicon carbide, graphite powder, carbon nano tubes and graphene, the curing agent is any one or a combination of more than one of methyltrimethoxysilane, methyltriethoxysilane, ethyl orthosilicate and methyl orthosilicate, and the catalyst is any one of dibutyltin dilaurate, stannous octoate and 1, 3-phenylenedioxy bis (ethyl acetoacetate) titanium.
3. The single-component heat-storage potting material of 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 single-component heat-storage potting material of claim 3, wherein: the expansion rate of the vermicular expanded graphite is 100-600ml/g, the granularity is 100-200 meshes, the expansion multiple is 200-600 times, and the bulk density is 0.2-0.5 g/cm3。
5. The single-component heat-storage potting material of 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 single-component heat-storage potting material of 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 single-component heat-storage potting material of 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 single-component heat storage potting material according to any one of claims 1 to 7, comprising the steps of:
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, mixing: putting the hydroxyl silicone resin and the phase change material into a vacuum kneader, stirring for 0.5-2 hours at the temperature of 80-150 ℃ and the vacuum degree of-0.04-0.10 MPa, and uniformly kneading to obtain a base material for later use;
step 3, stirring: and (3) placing the base material in the step (2) into a planetary stirrer, adding a curing agent, heat-conducting powder and a catalyst, stirring for 0.5-1.5 hours at a vacuum degree of-0.04-0.10 MPa at a speed of 30 revolutions per minute, and uniformly stirring.
9. The preparation method of the single-component heat-storage encapsulating material as claimed in claim 8, wherein the preparation method of the graphite-adsorbed 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 single-component heat storage encapsulating material as claimed in 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.
CN201911298664.XA 2019-12-17 2019-12-17 Single-component heat storage encapsulating material and preparation method thereof Pending CN110951445A (en)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102634212A (en) * 2012-04-23 2012-08-15 钱新明 Heat conductive silicone grease composition
CN109971415A (en) * 2019-04-10 2019-07-05 陈立 A kind of high heat conduction organosilicon adhesive and preparation method thereof
CN110408157A (en) * 2019-08-26 2019-11-05 张立强 Two-component heat accumulation Embedding Material and preparation method thereof

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102634212A (en) * 2012-04-23 2012-08-15 钱新明 Heat conductive silicone grease composition
CN109971415A (en) * 2019-04-10 2019-07-05 陈立 A kind of high heat conduction organosilicon adhesive and preparation method thereof
CN110408157A (en) * 2019-08-26 2019-11-05 张立强 Two-component heat accumulation Embedding Material and preparation method thereof

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Application publication date: 20200403