Low-cost and fast synthesis of nanoporous silica cryogels for thermal insulation applications

Li Fen Su, Lei Miao, Sakae Tanemura, Gang Xu

研究成果: Article

21 被引用数 (Scopus)

抄録

Nanoporous silica cryogels with a high specific surface area of 1095m 2g 1 were fabricated using tert-butyl alcohol as a reaction solvent, via a cost-effective sol-gel process followed by vacuum freeze drying. The total time of cryogel production was reduced markedly to one day. The molar ratio of solvent/precursor, which was varied from 5 to 13, significantly affected the porous structure and thermal insulating properties of the cryogels. The silica cryogels with low densities in the range of 0.08-0.18gcm 3 and thermal conductivities as low as 6.7mW(m·K) 1 at 100Pa and 28.3mW(m·K) 1 at 10 5Pa were obtained using this new technique.

本文言語English
論文番号035003
ジャーナルScience and Technology of Advanced Materials
13
3
DOI
出版ステータスPublished - 2012 6

ASJC Scopus subject areas

  • Materials Science(all)

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