文献类型：期刊文献

英文题名：Preparation of mechanically strong and lightweight cellulose aerogels from cellulose-NaOH/PEG solution

作者：Wan, Caichao[1] Lu, Yun[2] Jiao, Yue[1] Cao, Jun[3] Sun, Qingfeng[4] Li, Jian[1]

第一作者：Wan, Caichao

通信作者：Li, J[1]

机构：[1]Northeast Forestry Univ, Mat Sci & Engn Coll, Harbin 150040, Peoples R China;[2]Chinese Acad Forestry, Res Inst Wood Ind, Beijing 100091, Peoples R China;[3]Northeast Forestry Univ, Coll Mech & Elect Engn, Harbin 150040, Peoples R China;[4]Zhejiang Agr & Forestry Univ, Sch Engn, Linan 311300, Peoples R China

年份：2015

卷号：74

期号：1

起止页码：256-259

外文期刊名：JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY

收录：;EI(收录号：20150700516343);Scopus(收录号：2-s2.0-84925513682);WOS:【SCI-EXPANDED(收录号:WOS:000351541200031)】；

基金：This work was financially supported by the National Natural Science Foundation of China (Grant No. 31270590), a Project funded by the China Postdoctoral Science Foundation (2013M540263), and the Doctoral Candidate Innovation Research Support Program of Science and Technology Review (kjdb2012006).

语种：英文

外文关键词：Cellulose aerogels; Freeze drying; Mechanical properties; Porous materials; Polymers

摘要：Novel mechanically strong and lightweight cellulose aerogels were successfully prepared by the procedures in four steps: (1) dissolving bamboo fiber in a mild NaOH/PEG solution; (2) freeze-thaw treatment; (3) regeneration; (4) freeze drying. The aerogels with dense interconnected and hierarchical pore structures had high specific surface area of 204 m(2) g(-1), large pore volume of 0.99 cm(3) g(-1), high porosity as high as 97 % and low density of 0.054 g cm(-3), and showed cellulose II crystal structure. Moreover, the aerogels exhibited strong resistance to compression load with high Young' modulus of 1.85 MPa, yield stress of 83.57 kPa, and toughness of 52.34 kJ m(-3).