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Self-dispersing aerogel heat-insulating film and preparation method thereof

An airgel heat insulation film and self-dispersion technology, which is applied in coatings, polyurea/polyurethane coatings, etc., can solve the problems of difficulty in obtaining high filling rate, poor heat insulation performance, and the need for dispersants, etc., and achieve the reduction of additives , good thermal insulation performance, and the effect of increasing the content of airgel

Inactive Publication Date: 2022-02-25
苏州热象纳米科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The invention discloses a self-dispersing airgel thermal insulation film and a preparation method thereof, which solves the problems of airgel requiring a dispersant, difficulty in obtaining a high filling rate, and poor thermal insulation performance when preparing water-based slurry

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] This embodiment provides a self-dispersing airgel heat insulation film, the PET base material is 50 microns, and the self-dispersing resin is a nonionic polyether-polyurethane resin. Hydrophobic silica airgel powder, self-dispersing resin and defoaming agent weight percent: 49.5%: 50%: 0.5%, airgel film thickness 200 microns, hydrophobic silica airgel particle size 50 microns, defoaming agent The foaming agent is a silicone defoamer.

[0022] In addition, this example also provides a method for preparing a self-dispersing airgel thermal insulation film, the method comprising the following steps:

[0023] S1. Prepare airgel coating slurry: Add 50g of nonionic polyether-polyurethane resin, 300g of water, and 49.5 hydrophobic silica airgel into the vacuum disperser, disperse at high speed for 30 minutes at 1300 rpm, and then adjust the speed to 200 rpm, add 0.5g of silicone defoamer, and at the same time, vacuum up to -0.09MPa, stir for 60 minutes to defoam, and get coati...

Embodiment 2

[0026] This embodiment provides a self-dispersing airgel heat insulation film, the PET base material is 25 microns, and the self-dispersing resin is a methacrylic acid-terminated polyether-polyurethane comb polymer. Hydrophobic silica airgel powder, self-dispersing resin and defoamer weight percent: 39%: 60%: 1%, airgel film thickness 100 microns, hydrophobic silica airgel particle size 20 microns, defoaming agent The foaming agent is an acrylate defoamer.

[0027] In addition, this example also provides a method for preparing a self-dispersing airgel thermal insulation film, the method comprising the following steps:

[0028] S1. Preparation of airgel coating slurry: Add 60g of polyether-polyurethane comb polymer terminated with methacrylic acid, 300g of water, and hydrophobic silica airgel 39 into a vacuum disperser, and disperse at high speed for 20 minutes at 2000 rpm. Then the rotation speed was adjusted to 100 rpm, 1 g of silicone defoamer was added, and the vacuum was ...

Embodiment 3

[0031] This embodiment provides a self-dispersing airgel heat insulation film, the PET substrate is 100 microns, and the self-dispersing resin is a terminal polyether-polyurethane polymer. Hydrophobic silica airgel powder, self-dispersing resin and defoamer weight percent: 54%: 45.5%: 0.5%, airgel film thickness 400 microns, hydrophobic silica airgel particle size 50 microns, defoaming agent The foaming agent is a fluorine-containing defoaming agent.

[0032] In addition, this example also provides a method for preparing a self-dispersing airgel thermal insulation film, the method comprising the following steps:

[0033] S1. Prepare airgel coating slurry: Add 45.5g of terminal polyether-polyurethane polymer, 300g of water, and 54g of hydrophobic silica airgel into a vacuum disperser, disperse at high speed for 20 minutes at 2800 rpm, and then adjust the speed to 150 rpm, add 0.5g of fluorine-containing defoamer, and at the same time vacuumize to -0.08MPa, defoam for 90 minute...

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Abstract

The invention discloses a self-dispersing aerogel heat-insulating film and a preparation method thereof. The self-dispersing aerogel heat-insulating film is composed of a base material, self-dispersing resin, aerogel powder and a defoaming agent. The preparation method comprises the following steps: mixing self-dispersing resin, aerogel powder and water, performing high-speed dispersion to obtain self-dispersing aerogel slurry, and then forming a film on a PET (Polyethylene Terephthalate) base material by using the aerogel slurry through a coating process to form the aerogel heat-insulating film. The self-dispersing resin is a dispersing agent and a binder, so that the content of aerogel is increased while the dosage of the dispersing agent is reduced, and the heat insulation performance of the aerogel heat insulation film is improved.

Description

technical field [0001] The invention relates to a self-dispersing airgel thermal insulation film and a preparation method thereof, belonging to the field of preparation of functional film materials. Background technique [0002] Due to its excellent thermal insulation performance, airgel is used to develop various thermal insulation materials. Such as airgel insulation film, airgel insulation coating, airgel insulation paste. In the prior art, such as the water-soluble SiO of patent No. CN109913007B 2 The preparation method and application of airgel external wall reflective heat insulation coating and the patent No. CN104496399B is a kind of airgel building thermal insulation composite material and its preparation method, all of which use additives to pre-disperse airgel powder In water, and then adding water-based adhesives for performance adjustment, it is difficult for airgel to obtain a high volume filling rate, so it is difficult to form good thermal insulation perfor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J7/04C08L67/02C09D175/08C09D175/16C09D7/61
CPCC08J7/0427C09D175/08C09D175/16C09D7/61C09D7/70C08J2367/02C08J2475/08C08K7/26
Inventor 侯远
Owner 苏州热象纳米科技有限公司
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