CN110551486A - Preparation method of aerogel-containing phase-change film - Google Patents
Preparation method of aerogel-containing phase-change film Download PDFInfo
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- CN110551486A CN110551486A CN201910731887.4A CN201910731887A CN110551486A CN 110551486 A CN110551486 A CN 110551486A CN 201910731887 A CN201910731887 A CN 201910731887A CN 110551486 A CN110551486 A CN 110551486A
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- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
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- 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
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Abstract
The invention provides a preparation method of a phase change film containing aerogel, which takes a 10-500 mu m polymer film (PET, PP, PE) as a substrate, and a composite phase change coating (0.1-3mm) consisting of aerogel, phase change material, heat conduction material and resin, wherein the mass ratio of each part is as follows: 5-50 wt% of aerogel, 10-90 wt% of phase change material, 1-20 wt% of heat conduction material and 1-20 wt% of resin. The method has simple process and is suitable for large-scale production, and the phase change film prepared by the method has higher enthalpy value and heat conductivity coefficient and excellent product quality.
Description
Technical Field
The invention relates to the field of nano materials, in particular to a preparation method of a phase-change film containing aerogel.
Background
The silica aerogel is composed of particles with the particle size of 1-100nm and forms a nano material with a porous structure, and the material has the specific surface area of up to 400-1500m 2/g and the high porosity of 89-99.8%, so the silica aerogel has low thermal conductivity, ultralow density and low dielectric constant.
the liquid-solid phase change material has the advantages of wide phase change temperature, stable chemical property, high latent heat, low cost and the like. However, in practice, the liquid phase causes leakage problems, which limits its application. At present, researchers adopt porous materials such as aerogel, graphene and carbon nanotubes to be compounded with phase-change materials so as to solve the leakage problem.
Disclosure of Invention
The invention aims to solve the defects in the prior art and provides a preparation method of a phase-change film containing aerogel.
In order to achieve the purpose, the invention adopts the following technical scheme:
A preparation method of a phase-change film containing aerogel comprises the following steps:
S1, adding 0-50 wt% of surfactant into 10-90 wt% of water, adding 0-40 wt% of hydrophobic silica aerogel, and dispersing by using a dispersion machine to obtain an aqueous solution of the aerogel.
In the step S1, the water silicon oxide aerogel with the aperture of 1-100 μm is selected.
The rotation speed of the dispersion machine in the step S1 is 500-5000r/min, and the dispersion time is 0.1-5 h.
S2, adding aqueous resin and a heat conduction material into an aqueous solution of the aerogel, wherein the mass ratio of the aqueous solution of the aerogel to the aqueous resin to the heat conduction material is 1: 0.1-3: 0.1-5, stirring for 0.1-4h at the speed of 200-.
In the step S2, the water-based resin is one or more of water-based acrylic resin, water-based polyurethane, water-based epoxy resin and water-based silicone.
In the step S2, the heat conductive material is one or more of carbon powder, boron nitride, magnesium oxide, zinc oxide, aluminum oxide, silicon carbide, and graphene.
S3, controlling the thickness of the coating slurry to be 0.1-5mm, coating the coating slurry on films such as PET, PE, PP and the like, drying for 0-5h at 20-110 ℃ to obtain a film containing aerogel, coating a phase-change material on the film, and keeping the temperature above the phase-change temperature for 0.1-4h to ensure that the phase-change material permeates into pores of the aerogel on the film, thereby finally obtaining the phase-change film containing aerogel.
The phase change material in step S3 includes any one or a combination of two or more of paraffin, polyethylene glycol, polyhydric alcohol, alkane, higher fatty acid, higher fatty alcohol, and polyolefin.
Compared with the prior art, the invention has the beneficial effects that: the invention provides a preparation method of a phase change membrane containing aerogel, the method is simple in process and suitable for large-scale production, and the phase change membrane prepared by the method has higher enthalpy value and heat conductivity coefficient and excellent product quality.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments.
A preparation method of a phase-change film containing aerogel comprises the following steps:
S1, adding 0-50 wt% of surfactant into 10-90 wt% of water, adding 0-40 wt% of hydrophobic silica aerogel, and dispersing by using a dispersion machine to obtain an aqueous solution of the aerogel.
In the step S1, the water silicon oxide aerogel with the aperture of 1-100 μm is selected.
the rotation speed of the dispersion machine in the step S1 is 500-5000r/min, and the dispersion time is 0.1-5 h.
S2, adding aqueous resin and a heat conduction material into an aqueous solution of the aerogel, wherein the mass ratio of the aqueous solution of the aerogel to the aqueous resin to the heat conduction material is 1: 0.1-3: 0.1-5, stirring for 0.1-4h at the speed of 200-.
In the step S2, the water-based resin is one or more of water-based acrylic resin, water-based polyurethane, water-based epoxy resin and water-based silicone.
in the step S2, the heat conductive material is one or more of carbon powder, boron nitride, magnesium oxide, zinc oxide, aluminum oxide, silicon carbide, and graphene.
S3, controlling the thickness of the coating slurry to be 0.1-5mm, coating the coating slurry on films such as PET, PE, PP and the like, drying for 0-5h at 20-110 ℃ to obtain a film containing aerogel, coating a phase-change material on the film, and keeping the temperature above the phase-change temperature for 0.1-4h to ensure that the phase-change material permeates into pores of the aerogel on the film, thereby finally obtaining the phase-change film containing aerogel.
The phase change material in step S3 includes any one or a combination of two or more of paraffin, polyethylene glycol, polyhydric alcohol, alkane, higher fatty acid, higher fatty alcohol, and polyolefin.
The film takes a 10-500 mu m polymer film (PET, PP, PE) as a substrate, and a composite phase change coating (0.1-3mm) composed of aerogel, phase change material, heat conduction material and resin, wherein the mass ratio of each part is as follows: 5-50 wt% of aerogel, 10-90 wt% of phase change material, 1-20 wt% of heat conduction material and 1-20 wt% of resin.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (6)
1. The preparation method of the phase-change film containing aerogel is characterized by comprising the following steps:
S1, adding 0-50 wt% of surfactant into 10-90 wt% of water, adding 0-40 wt% of hydrophobic silica aerogel, and performing dispersion treatment by using a dispersion machine to obtain an aqueous solution of the aerogel;
S2, adding aqueous resin and a heat conduction material into an aqueous solution of aerogel, wherein the mass ratio of the aqueous solution of aerogel to the aqueous resin to the heat conduction material is 1: 0.1-3: 0.1-5, stirring for 0.1-4h at the speed of 200-;
S3, controlling the thickness of the coating slurry to be 0.1-5mm, coating the coating slurry on films such as PET, PE, PP and the like, drying for 0-5h at 20-110 ℃ to obtain a film containing aerogel, coating a phase-change material on the film, and keeping the temperature above the phase-change temperature for 0.1-4h to ensure that the phase-change material permeates into pores of the aerogel on the film, thereby finally obtaining the phase-change film containing aerogel.
2. The method of claim 1, wherein the step S1 is performed by using a silica aerogel with a pore size of 1 μm to 100 μm.
3. The method as claimed in claim 1, wherein the rotation speed of the disperser in step S1 is 500-5000r/min, and the dispersing time is 0.1-5 h.
4. The method of claim 1, wherein in step S2, the water-based resin is selected from one or more of water-based acrylic resin, water-based polyurethane, water-based epoxy resin, and water-based silicone.
5. The method as claimed in claim 1, wherein the heat conductive material in step S2 is selected from one or more of carbon powder, boron nitride, magnesium oxide, zinc oxide, aluminum oxide, silicon carbide, and graphene.
6. the method of claim 1, wherein the phase change material in the step S3 includes one or more of paraffin, polyethylene glycol, polyol, alkane, higher fatty acid, higher fatty alcohol, and polyolefin.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111793472A (en) * | 2020-07-17 | 2020-10-20 | 中国科学院苏州纳米技术与纳米仿生研究所 | Boron nitride aerogel phase-change film, and preparation method and application thereof |
| CN112480456A (en) * | 2020-12-22 | 2021-03-12 | 苏州热象纳米科技有限公司 | Aerogel-containing phase change film and preparation method and application method thereof |
| CN114085408A (en) * | 2021-11-28 | 2022-02-25 | 苏州热象纳米科技有限公司 | Self-dispersion aerogel heat insulation film and preparation method thereof |
| CN114539979A (en) * | 2020-11-26 | 2022-05-27 | 中国科学院大连化学物理研究所 | Boron nitride aerogel-based composite sizing phase-change material and preparation and application thereof |
| CN114804818A (en) * | 2022-05-24 | 2022-07-29 | 巩义市泛锐熠辉复合材料有限公司 | Low-cost aerogel composite material and preparation method thereof |
| CN115772385A (en) * | 2022-11-28 | 2023-03-10 | 西安交通大学 | Silicon carbide aerogel-based composite phase-change heat storage material and preparation method and application thereof |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111793472A (en) * | 2020-07-17 | 2020-10-20 | 中国科学院苏州纳米技术与纳米仿生研究所 | Boron nitride aerogel phase-change film, and preparation method and application thereof |
| CN114539979A (en) * | 2020-11-26 | 2022-05-27 | 中国科学院大连化学物理研究所 | Boron nitride aerogel-based composite sizing phase-change material and preparation and application thereof |
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| CN112480456B (en) * | 2020-12-22 | 2023-03-14 | 苏州热象纳米科技有限公司 | Aerogel-containing phase change film and preparation method and application method thereof |
| CN114085408A (en) * | 2021-11-28 | 2022-02-25 | 苏州热象纳米科技有限公司 | Self-dispersion aerogel heat insulation film and preparation method thereof |
| CN114804818A (en) * | 2022-05-24 | 2022-07-29 | 巩义市泛锐熠辉复合材料有限公司 | Low-cost aerogel composite material and preparation method thereof |
| CN114804818B (en) * | 2022-05-24 | 2023-04-11 | 巩义市泛锐熠辉复合材料有限公司 | Low-cost aerogel composite material and preparation method thereof |
| CN115772385A (en) * | 2022-11-28 | 2023-03-10 | 西安交通大学 | Silicon carbide aerogel-based composite phase-change heat storage material and preparation method and application thereof |
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Inventor after: Hou Yuan Inventor before: Hou Yuan |
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Application publication date: 20191210 |