Flexible, low-density polymer crosslinked silica aerogels

被引：127

作者：

Capadona, Lynn A. ^{[1
]}

Meador, Mary Ann B. ^{[1
]}

Alunni, Antonella ^{[1
]}

Fabrizio, Eve F. ^{[1
]}

Vassilaras, Plousia ^{[1
]}

Leventis, Nicholas ^{[1
]}

机构：

[1] NASA, Glenn Res Ctr, Cleveland, OH 44135 USA

来源：

POLYMER | 2006年 / 47卷 / 16期

基金：

美国国家航空航天局;

关键词：

polymer crosslinked aerogels; mesoporous; di-isocyanates;

D O I：

10.1016/j.polymer.2006.05.073

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Polymerization of a di-isocyanate with the amine-modified surface of a sol-gel derived mesoporous silica network crosslinks the nanoparticles of the silica skeleton, and reinforces the otherwise fragile framework. Systematically adjusting the processing variables affecting density produce aerogels whose macroscopic properties could be controlled, and are attributed to changing nanoscale morphology. Aerogels crosslinked using the smallest amount of silica studied exhibit as much as a 40-fold increase in strength over the corresponding non-crosslinked framework, and are flexible. (c) 2006 Elsevier Ltd. All rights reserved.

引用

页码：5754 / 5761

页数：8

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