Preparation and properties of silicone/phenolic hybrid aerogel

被引：0

作者：

Xu W. ^{[1
]}

Jia X. ^{[2
]}

Wang J. ^{[1
]}

Qiao W. ^{[1
]}

Ling L. ^{[1
]}

Wang R. ^{[3
]}

Yu Z. ^{[3
]}

Zhang Y. ^{[3
]}

机构：

[1] State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai

[2] Industrial College of Carbon Fiber and New Materials, Changzhou Institute of Technology, Jiangsu, Changzhou

[3] Hesheng Silicon Industry (Shanshan) Co. Ltd., Xinjiang, Turpan

来源：

Huagong Xuebao/CIESC Journal | 2023年 / 74卷 / 08期

关键词：

aerogel; insulation; mechanical; phenolic; silicone;

D O I：

10.11949/0438-1157.20230500

中图分类号：

学科分类号：

摘要：

The inherent brittleness of phenolic aerogels limits its application in the fields of adsorption and heat insulation. In this study, silicone solution was prepared by using 3-aminopropyltriethoxysilane and terephthalaldehyde, which is mixed with the solution of thermoplastic phenolic resin and hexamethylene tetramine, solving the compatibility problem between the two systems through chemical bonding, and sol-gel reaction and ambient pressure drying were carried out to obtain the silicone/phenolic hybrid aerogel. Due to both the introduction of flexible silicone molecular chains and the effect of smaller gel particle size, the brittleness of phenolic aerogel is overcome. The results indicate that obtained hybrid aerogel possesses nanoscale gel network structure, and has a low density of 0.187 g/cm3 and a low room-temperature thermal conductivity of 0.035 W/(m·K). Besides, the hybrid aerogel can better dissipate the stress instead of experiencing brittle fractures under compressive stress. The modulus of the hybrid aerogel is as low as 13.92 MPa, 46% lower than that of phenolic aerogel. This hybrid aerogel prepared with a facile and efficient method is of promising application prospects. © 2023 Materials China. All rights reserved.

引用

页码：3572 / 3583

页数：11

共 32 条

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