文献类型：期刊文献

英文题名：Synthesis and Physico-Chemical Properties of Poly(methylmethacrylate)-Modified Silica Aerogels by Ambient Pressure Drying

作者：Ma, Hainan[1];Wang, Baomin[1];Han, Junnan[1];Lei, Zhao[2];Yuan Dawei[2]

第一作者：Ma, Hainan

通讯作者：Wang, BM[1]

机构：[1]Dalian Univ Technol, Sch Civil Engn, Dalian 116024, Peoples R China;[2]Xinxiang Univ, Sch Civil Engn & Architecture, Xinxiang 453000, Peoples R China

第一机构：Dalian Univ Technol, Sch Civil Engn, Dalian 116024, Peoples R China

通讯机构：[1]corresponding author), Dalian Univ Technol, Sch Civil Engn, Dalian 116024, Peoples R China.

年份：2015

卷号：7

期号：11

起止页码：930-938

外文期刊名：NANOSCIENCE AND NANOTECHNOLOGY LETTERS

收录：;EI(收录号：20161602260061);Scopus(收录号：2-s2.0-84963705981);WOS:【SCI-EXPANDED(收录号:WOS:000374013200012)】；

基金：This study is sponsored partly by the Natural Science Foundation of China ( 51278086, 51578108). The authors wish to thank Henan Open and Cooperation Project of Science and Technology ( 142106000023). Besides, special thanks are given to the Fundamental Research Funds for Dalian Plan Projects of Science and Technology ( 2013A16GX113). Lastly, the financial support from China Petroleum Science and Technology Innovation Fund Research Project ( 2013D-5006-0606) is gratefully acknowledged.

语种：英文

外文关键词：Silica Aerogels; PMMA; PMMA-Modified Silica Aerogels; Ambient Pressure Drying; Mechanical Properties

摘要：Poly(methylmethacrylate)(PMMA)-modified silica aerogels were prepared via sol-gel synthesis followed by ambient pressure drying through hydrolysis and polycondensation of sodium silicate as a precursor. (3-trimethoxysilyl) propyl methacryloxy (TMSPM) was employed as the bonding between PMMA and nanoparticles of the aerogels skeletal backbone for avoid PMMA leaching. We studied the effects of various contents of polymer and TMSPM on the physico-chemical properties of the silica aerogels. The resulting polymer coatings increase the density of the aerogels by a factor of 2-3 but the Yong's modulus and hardness of the resulting materials may increase by more than 12 and 61 orders of magnitude. Modified by 30% PMMA and 15 ml TMSPM, the aerogel ultimately failed at 60% compressive strain and the final compressive stress is 168 MPa according to the compressing test. It was found that the nanoporous structure of aerogels could be well protected by introducing PMMA into the silica network.