A kind of preparation method of airgel carbon fiber composite filter membrane

Abstract

The invention discloses a preparation method for an aerogel carbon fiber compound filtering film. The preparation method comprises the following steps: dissolving aerogel into a solvent, adding a dispersing agent, adding 0.1mm carbon fiber into a solution and uniformly stirring; and adding an adhesive, uniformly stirring and then coating onto a base film, thereby acquiring the aerogel carbon fiber compound filtering film. The method is simple in process. The prepared aerogel filtering film has the characteristics of low density of aerogel, high specific surface area and high porosity, has the physical properties of the carbon fiber, has an excellent absorbing effect and is soft and difficult to break.

Description

technical field [0001] The invention belongs to the field of adsorption filtration, and in particular relates to a preparation method of an airgel carbon fiber composite filtration membrane. Background technique [0002] SiO2 airgel has a nano-mesoporous network structure with low density, high specific surface area and high porosity, so SiO2 airgel has broad application prospects in adsorption and filtration. However, SiO2 airgel is brittle and fragile, and its mechanical properties are poor, which severely restricts its large-scale industrialization and practical application. Carbon fiber has two characteristics of strong tensile strength of carbon material and soft and processable fiber. However, there is a strong van der Waals force between nano-carbon fibers, which is easy to entangle and is difficult to disperse in the material matrix. This not only affects the physical properties of carbon fiber, but also has a certain negative effect on the microscopic pore structur...

AI Technical Summary

Problems solved by technology

However, SiO2 airgel is brittle and fragile, and its mechanical properties are poor, which severely restricts its large-scale industrialization and practical application.

Carbon fiber has two characteristics of strong tensile strength and soft processability of carbon materials. However, there is a strong van der Waals force between nano-carbon fibers, which is easy to entangle and difficult to disperse in the material matrix.

This not only affects the physical properties of carbon fiber, but also has a certain negative effect on the microscopic pore structure and performance of the composite airgel.