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An aerogel composite material comprising submicron whiskers and clay and a preparing method thereof

A composite material and sub-micron technology, applied in the field of materials, can solve problems such as environmental impact, achieve the effects of reducing expansion, improving bonding effect, and simple preparation process

Inactive Publication Date: 2016-12-21
GUANGZHOU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This patent is used to prepare SiO 2 Airgel, the preparation process requires the use of organic solvents such as ethanol and organic modified solvents such as trimethylchlorosilane, which has a certain impact on the environment

Method used

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  • An aerogel composite material comprising submicron whiskers and clay and a preparing method thereof
  • An aerogel composite material comprising submicron whiskers and clay and a preparing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] This embodiment prepares the airgel composite material containing submicron crystals and clay, uses PVOH (polyvinyl alcohol) as binder, calcium sulfate submicron whiskers and montmorillonite as raw materials, and the preparation steps are as follows:

[0029] (1) Add PVOH (polyvinyl alcohol) particles to deionized water, wherein the mass concentration of PVOH is 3%, and stir in a constant temperature water bath at 85°C until PVOH is completely dissolved;

[0030] (2) Montmorillonite and PVOH are uniformly dispersed under the condition of 5000 rev / min at a stirring speed, and left to stand after stirring for 2 minutes to obtain clay / bonding aid sol, and the ratio of the clay and the bonding aid is by mass The ratio is 100:3.

[0031] (3) calcium sulfate submicron whiskers are added in the montmorillonite / PVOH sol that step (2) makes, and the mass ratio that calcium sulfate submicron whiskers accounts for montmorillonite / PVOH is 3%, and stirring speed is 5000 Stirring un...

Embodiment 2

[0036] In this embodiment, the preparation steps of the airgel composite material containing SiC submicron whiskers and kaolin are as follows:

[0037] (1) Add polyimide particles to deionized water, wherein the polyimide mass concentration is 5%, and stir in a constant temperature water bath at 85°C until the polyimide is completely dissolved;

[0038] (2) Kaolin and polyimide are uniformly dispersed under the condition of 5000 rev / min at a stirring speed, and left to stand after stirring for 2 minutes to obtain clay / adhesion aid sol, and the ratio of the clay and the adhesion aid is as follows: The mass ratio is 100:5.

[0039] (3) Add SiC submicron whiskers to kaolin / polyimide sol, the mass ratio of SiC submicron whiskers to kaolin / polyimide sol is 4%, and the stirring speed is 5000 rpm Stir for 30 minutes to disperse evenly to obtain SiC submicron whiskers / clay sol;

[0040] (4) React at a temperature of -80° C. for 5 minutes, so that the obtained SiC submicron whisker / c...

Embodiment 3

[0044] This embodiment prepares Si-containing 3 N 4 The preparation steps of submicron whiskers and organic bentonite airgel composites are as follows:

[0045] (1) Add polypropylene alcohol particles to deionized water, wherein the mass concentration of polypropylene alcohol is 3%, and stir in a constant temperature water bath at 85°C until the polypropylene alcohol is completely dissolved;

[0046] (2) organic bentonite and polypropylene alcohol are uniformly dispersed under the condition of 5000 rev / min at a stirring speed, and left to stand after stirring for 2 minutes to obtain clay / adhesion aid sol, and the ratio of the clay and the adhesion aid is The mass ratio is 100:3.

[0047] (3) Si 3 N 4 Submicron whiskers added to organobentonite / polypropylene alcohol sol, Si 3 N 4 The mass ratio of submicron whiskers to organic bentonite / polypropylene alcohol is 4%, and it is stirred for 20 minutes at a stirring speed of 5000 rpm to make it uniformly dispersed to obtain Si...

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Abstract

An aerogel composite material comprising submicron whiskers and clay and a preparing method thereof are provided. The composite material comprises the submicron whiskers, the clay and an adhesive auxiliary. The submicron whiskers fill clay / adhesive auxiliary sol prepared from the clay and the adhesive auxiliary to prepare the composite material. The diameter of the submicron whiskers ranges from 100 nm to 1 mum, the length / diameter ratio is 10-10000, and the submicron whiskers have good combinability with clay aerogel. The prepared submicron whisker / clay aerogel composite material is significantly improved in mechanical performance and blocking performance.

Description

technical field [0001] The invention belongs to the technical field of materials, and relates to an airgel composite material containing submicron whiskers and clay and a preparation method thereof. Background technique [0002] Airgel is an amorphous solid material with a unique three-dimensional network porous structure formed by cross-linking molecules or polymers. Its unique structure enables it to exhibit excellent properties such as high porosity, high specific surface area, low density, and low thermal conductivity, which has attracted widespread attention in many fields such as aerospace, industry, and construction. With the development of airgel materials and preparation technology, airgel materials are no longer limited to SiO 2 Airgel, using clay as raw material, clay aerogel prepared by sol and low-temperature vacuum drying process has good biocompatibility and degradability, simple preparation process, environmental protection and pollution-free, is considered ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B26/04C04B14/38C04B14/10C04B26/20
CPCC04B26/04C04B26/20C04B2201/50C04B14/383C04B14/104C04B22/002C04B14/106
Inventor 吴会军黄活阳陆俞辰
Owner GUANGZHOU UNIVERSITY
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