Preparation method of fiber/ZrO2 aerogel composite material

A composite material and aerogel technology, which is applied in the field of preparing fiber/ZrO2 aerogel composite materials, can solve the problems of poor bulkiness, low aerogel strength, difficult application, etc., so as to improve the overall bulkiness and expand the application. range, the effect of improving mechanical properties

Active Publication Date: 2012-06-20
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But there are still the following major problems, ZrO 2 During the drying stage of the preparation process, the aerogel will have large shrinkage, deformation and collapse, and its ag

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Embodiment 1, a kind of fiber / ZrO 2 The preparation method of the airgel composite material, the fiber is selected from quartz fibers with a diameter of 2-10 μm and an aspect ratio of 900-1500, the fiber surface treatment solution is composed of a cross-linking agent and a solvent, the cross-linking agent is selected KH550, and the solvent is an ethanol aqueous solution (Ethanol and water are mixed according to the volume ratio of 6:1), zirconium oxynitrate is selected for inorganic zirconium salt, propylene oxide is selected for epoxy, acetic acid is selected for chelating agent, dimethylformamide is selected for drying control chemical additive, surface modification The solvent solution is selected from the ethanol solution of ethyl orthosilicate (volume percent solubility of ethyl orthosilicate is 15%), and the low surface tension solvent is n-hexane;

[0041] Include the following steps in order:

[0042] 1), fiber surface pretreatment:

[0043] Take ZrO in the sy...

Embodiment 2

[0056] Embodiment 2, a kind of fiber / ZrO 2 The preparation method of the airgel composite material, the reinforced body fiber is selected from zirconia fibers with a diameter of 5-16 μm and an aspect ratio of 300-800, and the fiber surface treatment solution is composed of a cross-linking agent and a solvent. The cross-linking agent is selected from KH570, and the solvent is selected from Ethanol aqueous solution (obtained by mixing ethanol and water at a volume ratio of 6:1), zirconyl nitrate for inorganic zirconium salt, propylene oxide for epoxide, acetylacetone for chelating agent, and dimethylformamide for drying control chemical additive , the surface modifier solution selects the ethanol solution of tetraethyl orthosilicate (volume percent solubility of tetraethyl orthosilicate is 15%), and the low surface tension solvent is n-hexane;

[0057] Include the following steps in order:

[0058] 1), fiber surface pretreatment:

[0059] Take ZrO in the system 2 10% of the t...

Embodiment 3

[0070] Embodiment 3, a kind of fiber / ZrO 2 The preparation method of the airgel composite material, the reinforcing body fiber is formed by mixing the glass fiber and the high silica fiber according to the mass ratio of 1:1, the diameter of the glass fiber and the high silica fiber are both 5-26 μm, and the length-to-diameter ratio is uniform. 300-800; the fiber surface treatment solution is composed of a cross-linking agent and a solvent, the cross-linking agent is KH570, the solvent is ethanol aqueous solution (obtained by mixing ethanol and water according to the volume ratio of 6:1), and the inorganic zirconium salt is zirconyl nitrate , epoxide is selected propylene oxide for use, and chelating agent is selected acetylacetone for use, and drying control chemical additive is selected formamide for use, and surface modifier solution selects the ethanol solution of tetraethyl orthosilicate for use (the volume percentage solubility of tetraethyl orthosilicate is 15 %), the lo...

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Abstract

The invention discloses a preparation method of a fiber/ZrO2 aerogel composite material. The method comprises the following steps of: 1) carrying out surface pretreatment on a reinforcement fiber; 2) uniformly stirring an inorganic zirconium salt, an alcohol water solvent, the surface pretreated fiber, a chelating agent, a drying control chemical additive and epoxide; 3) carrying out water bath on a composite system of an obtained sol and the fiber; 4) after aging the wet gel after the water bath is carried out, washing the wet gel by using absolute ethyl alcohol; dipping the wet gel by usinga surface modifying agent solution; and finally, dipping the wet gel by using a low surface tension solvent; 5) drying the obtained gel; and 6) carrying out heat treatment on the obtained article after being dried in the step 5) at 400-700 DEG C for 3-8 h so as to obtain the fiber/ZrO2 aerogel composite material. By using the fiber/ZrO2 aerogel composite material prepared by using the method disclosed by the invention, the excellent performance of the ZrO2 aerogel can be kept and the mechanical performance of the ZrO2 aerogel can be improved.

Description

technical field [0001] The invention belongs to the technical field of inorganic material preparation and sol-gel method, and specifically relates to a method of preparing fiber / ZrO by using zirconium inorganic salt precursor and fiber as raw materials. 2 Methods for airgel composites. Background technique [0002] Airgel is a highly dispersed solid material in which colloidal particles or polymer molecules coalesce to form a nanoporous network structure, and the pores are filled with a gaseous dispersion medium. The solid phase and pore structure are both on the nanometer scale. Due to its nanoporous network structure, airgel has physical and chemical properties such as high specific surface area, high porosity, high adsorption, low density, and low thermal conductivity. , medicine, building energy saving, aerospace and many other fields have broad application prospects, and have been used as heat insulation materials, catalysts and their carriers, acoustic impedance coupl...

Claims

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Application Information

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IPC IPC(8): C04B30/02
Inventor 郭兴忠颜立清杨辉
Owner ZHEJIANG UNIV
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