Transparent, hydrophobic composite aerogels with high mechanical strength and low high-temperature thermal conductivities

被引：81

作者：

Wei, Te-Yu ^{[1
,2
]}

Lu, Shih-Yuan ^{[1
]}

Chang, Yu-Cheng ^{[2
]}

机构：

[1] Natl Tsing Hua Univ, Dept Chem Engn, Hsinchu 30013, Taiwan

[2] Ind Technol Res Inst, Ind Energy Saving Technol Div, Energy & Environm Labs, Hsinchu 310, Taiwan

来源：

JOURNAL OF PHYSICAL CHEMISTRY B | 2008年 / 112卷 / 38期

关键词：

D O I：

10.1021/jp804855v

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

A facile one-step polymer-incorporation sol-gel process, together with a surface modification and an ambient pressure drying processes, was developed to prepare silica-poly(vinylpyrrolidone) composite aerogels. These composite aerogels are with high hydrophobicity (static contact angle > 120 degrees), good mechanical strength (Young's modulus of bending > 30 MPa), and low high-temperature thermal conductivity (0.063 W/m-K at 300 degrees C), which are critical characteristics for practical applications of aerogels, particularly in energy saving areas, for long-term usage and large scale production.

引用

收藏

页码：11881 / 11886

页数：6

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