Super thermal insulating SiO2 cryogels prepared by vacuum freeze drying

Lifen Su, Lei Miao, Gang Xu, Sakae Tanemura

研究成果

5 被引用数 (Scopus)

抄録

Traditionally, silica aerogels with low thermal conductivity are prepared by supercritical drying, however, the process is expensive and hazardous due to it run in autoclaves. In order to overcome these disadvantages, a cheaper and safer process, drying at ambient pressure has been developed for decades, but tedious repetitive gel washing and solvent exchange steps are involved. Therefore, in the present study, a novel vacuum freeze-drying was utilized to prepare the super thermal insulating SiO2 cryogels. The wet gels were synthesized via acid-base catalysis using tetraethoxysilane (TEOS) as a silica precursor and ethanol as a solvent. After vacuum freeze drying, nanoporous SiO2 cryogels with low density in the range of 0.08-0.15 g/cm 3 were obtained.

本文言語English
ホスト出版物のタイトルChinese Ceramics Communications
出版社Trans Tech Publications
ページ851-854
ページ数4
1
ISBN(印刷版)0878492755, 9780878492756
出版ステータスPublished - 2010
外部発表はい
イベント6th China International Conference on High-Performance Ceramics, CICC-6 - Harbin, China
継続期間: 2009 8 162009 8 19

出版物シリーズ

名前Advanced Materials Research
番号1
105-106
ISSN(印刷版)1022-6680

Conference

Conference6th China International Conference on High-Performance Ceramics, CICC-6
国/地域China
CityHarbin
Period09/8/1609/8/19

ASJC Scopus subject areas

  • 工学(全般)

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