Study on 3D Printing Flexible SiO2 Aerogel Composites

Abstract

Abstract: SiO₂ aerogel is an excellent thermal insulation material, which has excellent properties, due to its special network structure, such as high specific surface area, high porosity, low thermal conductivity and low density. However, the mechanical properties of SiO₂ aerogel are fragile, which makes it difficult to prepare complex and miniature components by traditional manufacturing methods, which greatly hinders the development and application of SiO₂ aerogel in the field of heat insulation. In this paper, flexible SiO₂ aerogel composites were prepared by 3D printing direct writing technology. By studying the content of different polyvinyl alcohol solutions and sodium stearate, the optimal slurry ratio was found. The thermal conductivity of the printed flexible SiO₂ aerogel composites at 100 ℃ is as low as 0.026 W/(m·K), and it has good compression performance, bending performance and hydrophobicity. This study provides a possibility for the large-scale application of SiO₂ aerogel.

Key words: aerogel, SiO₂, 3D printing, flexible, low thermal conductivity, hydrophobicity

CLC Number:

TB321

CHEN Hao, CHU Chengyi, WANG Yuting, BAO Xixi, QIU Zhuohao, CHENG Yuchuan, GUO Jianjun, SHAN Xinggang, SUN Aihua. Study on 3D Printing Flexible SiO₂ Aerogel Composites[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2024, 43(5): 1756-1763.

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Study on 3D Printing Flexible SiO₂ Aerogel Composites

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