A kind of water glass based sio 2 Airgel/carbon foam composite insulation

Abstract

The present invention aims to provide a water glass-based SiO 2 Airgel / carbon foam composite thermal insulation made of carbon foam reinforcement and water glass-based SiO 2 Airgel composition characterized by water glass-based SiO 2 The airgel is evenly filled in the voids in the carbon foam reinforced body, and the density of the composite thermal insulation material is 1~10 Kg / m 3 , the thermal conductivity of the composite thermal insulation material is 0.02~0.05 W / m·K, the compressive strength of the composite thermal insulation material is 0.01~0.5 MPa, the carbon foam skeleton has an open cell structure, and the porosity is 90%~ 99%, the pore size is 20-80μm, the SiO 2 Airgel specific surface area 400~1000 m 2 / g. Carbon foam obtained by pyrolysis of melamine foam, prepared by sol-gel method and atmospheric pressure drying to obtain SiO 2 Airgel / carbon foam composite insulation. Beneficial effects of the present invention: the present invention passes carbon foam and water glass-based SiO 2 Airgel composite, low cost, simple preparation process, low material density, excellent hydrophobic performance, low thermal conductivity, is an excellent lightweight thermal insulation material.

Description

technical field [0001] The invention relates to a composite thermal insulation material, in particular to a water glass-based SiO 2 Airgel / carbon foam composite insulation. Background technique [0002] With the progress and development of science and technology, more stringent requirements are put forward for modern materials, such as: high temperature resistance, corrosion resistance, low density, oxidation resistance, certain mechanical strength, good heat insulation performance, etc. Carbon foam is a member of a family of carbon materials that are well suited to meet the requirements of modern technology. In recent years, carbon foams have attracted increasing research interest due to their excellent material properties. As a new type of material in the carbon family, carbon foam (carbon foam) is a lightweight porous material with carbon atoms as the skeleton, and the carbon atoms are connected to each other to form a three-dimensional network structure. It has excell...

AI Technical Summary

Problems solved by technology

[0007] The above inventions give some ideas for aerogel-enhanced carbon foams, by adding SiO 2 Airgel is used to modify the performance of carbon foam, such as improving the thermal insulation performance, which has a certain enhancement effect, but the preparation of SiO 2 The cost of airgel is relatively high, and the carbon foam / SiO 2 Airgel composites use water glass as a silicon source, with low cost and simple preparation process