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Aqueous slurry material containing silicon dioxide aerosol, preparation method and application thereof

A technology of silica and water-based slurry, applied in the direction of coating, etc., can solve the problems of difficulty in controlling the hydrophobic and hydrophilic properties of airgel, cumbersome process, etc., achieve low cost, simple preparation process, and avoid the effect of powder release

Inactive Publication Date: 2015-11-11
苏州同玄新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Publication No. CN102719129A patent reports a method for preparing an airgel thermal insulation coating, but this method needs to first modify the hydrophobic aerogel to a hydrophilic aerogel, and then disperse it in water to prepare a water-based coating. This method is cumbersome and difficult to control the hydrophobic and hydrophilic properties of the airgel

Method used

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  • Aqueous slurry material containing silicon dioxide aerosol, preparation method and application thereof
  • Aqueous slurry material containing silicon dioxide aerosol, preparation method and application thereof
  • Aqueous slurry material containing silicon dioxide aerosol, preparation method and application thereof

Examples

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Embodiment approach

[0042] see figure 1 , as a typical embodiment of the present invention, the preparation method of the aqueous slurry containing silica airgel comprises:

[0043](1) Mix water and surfactant evenly to form a mixed solution (mixed solution 1);

[0044] (2) Add silica airgel powder to the mixed liquid, mix uniformly to form a suspension (mixture 1),

[0045] (3) Add binder and additives that may or may not be added to the suspension, and mix uniformly to form the aqueous slurry (slurry 1).

[0046] Further, in this typical embodiment, after the slurry 1 is prepared, defoaming treatment can be carried out according to actual needs to obtain the slurry 2, wherein the defoaming method can be defoaming by using a defoaming agent or vacuum stirring.

[0047] Further, the mixing method adopted in the preparation method is at least selected from ball milling, mechanical stirring, sand milling, and ultrasonic mixing methods.

[0048] The mixing method adopted in step 1) of the present...

Embodiment 1

[0061] Example 1 Mix 80g of deionized water and 2g of triethanolamine with a mechanical stirrer, the stirring speed is 100rpm, and the stirring time is 5 minutes to obtain a uniform mixed solution. Add 10g of silica airgel powder to the mixed solution. The density is 0.1g / ml, the average particle size is 50μm, the stirring speed is 500rpm, and the stirring time is 30 minutes. The prepared airgel dispersion should be a milky white stable dispersion system. Add 5g polyvinyl alcohol to the dispersion 1500, 1.5g polyethylene glycol 400 and 1.5g dibutyl phthalate, use a mechanical stirrer to stir for 30 minutes, the stirring speed is 200rpm, the slurry obtained is defoamed in a vacuum defoamer for 20 minutes, defoaming The stirring speed is 10 rpm, and the vacuum degree is 0.08 atm. The airgel aqueous slurry was obtained, and the viscosity of the slurry was 2000mPa / s. The airgel slurry was sprayed onto the aluminum alloy base plate by spraying, with a spray thickness of 0.5mm, and...

Embodiment 2

[0062] Example 2 20g of deionized water and 2g of triethanolamine were mixed with a mechanical stirrer, the stirring speed was 100rpm, and the stirring time was 5 minutes to obtain a uniform mixed solution, and 10g of silica airgel powder was added to the mixed solution, the powder Density is 0.1g / ml, and average particle diameter is 50 μ m, and stirring speed is 500rpm, and stirring time is 30 minutes, and the airgel dispersion liquid of preparation should be milky white stable dispersion system, add 64g deacrylic acid emulsion and 20 g of water and 4 g of Texanol were mixed for 10 minutes using a mechanical stirrer at a stirring speed of 200 rpm. The obtained slurry was defoamed in a vacuum defoamer for 20 minutes, the defoaming stirring speed was 10 rpm, and the vacuum degree was 0.08 atm. The airgel water-based slurry was obtained, and the viscosity of the slurry was 3500 mPa / s. The airgel slurry was sprayed onto the aluminum alloy base plate by spraying with a spray thic...

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Abstract

The invention discloses an aqueous slurry material containing silicon dioxide aerosol, a preparation method and an application thereof. The aqueous slurry material is a stable dispersion system formed by uniformly mixing silicon dioxide aerosol powder, a surfactant, a bonding agent and water. The preparation method includes following steps: mixing water with the surfactant uniformly, adding the aerosol powder and mixing the mixture uniformly to obtain a suspension liquid, and adding the bonding agent and adding or not adding an additive, and uniformly mixing the mixture to obtain the aqueous slurry material. The aqueous slurry material is free of asbestos and other harmful fiber materials, is convenient to transport and construct, is free of cutting and can be easily controlled in thickness of a produced heat-insulating material, can be used through an optimized construction scheme freely, is simple in preparation process and low in cost, and is suitable for large-scale industrial production. The aqueous slurry material can be used for coating the surface of a base material and can form a coating after drying, which is flat in surface, is excellent in heat-insulating performance and is strong in bonding force, and also can be mixed with other structural materials to prepare an aqueous composite material.

Description

technical field [0001] The invention relates to a functional slurry, in particular to an aqueous slurry containing silica airgel, its preparation method and application. Background technique [0002] Airgel is a material obtained by replacing the moisture inside it with gas while keeping the volume of the gel constant. Aerogels have excellent characteristics such as low density, high porosity, high specific surface area and low thermal conductivity. The preparation method of airgel generally uses supercritical drying, but supercritical drying needs to be carried out under higher temperature and higher pressure, so the equipment used is expensive and dangerous, so the normal pressure drying technology is developed, and the publication numbers are CN103073008A and The patent of CN103043673A discloses a method for preparing airgel by drying under normal pressure. The drying conditions under normal pressure are mild and the cost is low. Generally, the products obtained by dryin...

Claims

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Application Information

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IPC IPC(8): C09D133/00C09D129/04C09D7/12C04B26/04
Inventor 张学同张尚权王锦
Owner 苏州同玄新材料有限公司
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