Silicon-dioxide aerogel thermal-insulation material and preparation method thereof

Abstract

The invention provides a silicon-dioxide aerogel thermal-insulation material and a preparation method thereof, belongs to the technical field of thermal-insulation materials, and particularly relates to the silicon-dioxide aerogel thermal-insulation material and the preparation method thereof. The invention aims at solving the problems that in the prior art, aerogel and thermal-insulation materials are low in intensity, tedious and complicated in preparation process, and not well popularized. The silicon-dioxide aerogel thermal-insulation material comprises, by weight, 20-40 parts of silicon-dioxide aerogel sol, 15-35 parts of water, 10-20 parts of glass fiber, 5-8 parts of silicon nanotube and 0.5-2 parts of active agent. The prepared silicon-dioxide aerogel thermal-insulation material has better stability, and long fibers are fused with the nanotubes and aerogel materials. The heat conductivity coefficient reaches 0.011W / (m<2>*K), the thermal-insulation performance of the thermal-insulation material is greatly improved, and the thermal-insulation effect is improved.

Description

technical field [0001] A thermal insulation material and a preparation method thereof belong to the technical field of thermal insulation material preparation, and mainly relate to a silica airgel thermal insulation material and a preparation method thereof. Background technique [0002] Airgel is a solid form of matter, one of the smallest solids in the world. The density is 3 kilograms per cubic meter. Because of the extremely low density, the lightest aerogel at present is only 0.16 mg per cubic centimeter, which is slightly lower than air density, so it is also called "frozen smoke" or "blue smoke". Because the particles inside are very small (nanoscale), visible light is less scattered when it passes through it (Rayleigh scattering), just like sunlight passing through air. Therefore, it also looks blue like the sky (if nothing else is in it), and looks a little reddish when held up to the light. (The sky is blue, while the evening sky is red). Because generally more...

AI Technical Summary

Problems solved by technology

The application of aerogels to thermal insulation materials has gradually attracted people's attention, but the strength of airgel and thermal insulation materials in the prior art is not high, and the preparation process is cumbersome and complicated, so it has not been well promoted