Preparation method of fiber/ZrO2 aerogel composite material

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...

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 agglomeration is poor, and due to its three-dimensional network structure, ZrO 2 Airgel has low strength and high brittleness, so it is usually difficult to apply directly in engineering