文献类型：期刊文献

英文题名：Improvement of Mechanical, Hydrophobicity and Thermal Properties of Chinese Fir Wood by Impregnation of Nano Silica Sol

作者：Xu, Enguang[1] Zhang, Yanjuan[2] Lin, Lanying[1]

第一作者：Xu, Enguang

通信作者：Lin, LY[1]

机构：[1]Chinese Acad Forestry, Res Inst Wood Ind, Beijing 100091, Peoples R China;[2]Zhejiang Agr & Forestry Univ, Jixian Honors Coll, Hangzhou 311300, Peoples R China

年份：2020

卷号：12

期号：8

外文期刊名：POLYMERS

收录：;EI(收录号：20203409082454);Scopus(收录号：2-s2.0-85089548957);WOS:【SCI-EXPANDED(收录号:WOS:000564668700001)】；

基金：This research was supported by the "Nature Science Foundation of China" (no. 31000272).

语种：英文

外文关键词：in-situ composition; nano silica sol; SiO2-wood composites; wood cell wall; vacuum; pressure impregnation

摘要：In this paper, a wood-SiO(2)composite material was prepared via in-situ polymerization using vacuum/pressure impregnation technology using commercial scale nano silica sol and Chinese Fir (Cunninghamia lanceolate(Lamb.) Hook.). Scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), thermogravimetric analysis (TG), and water contact angle were used to study the changes in the microstructure and physical and mechanical properties of this composite. The results showed that silica sol can penetrate and distribute into the wood cell cavities and surface of cell walls and hence combine with the substances of wood materials. FTIR results indicated that the -OH groups of wood can polycondense in-situ with silica sol to form Si-O-C covalent bonds, and amorphous SiO(2)formed from Si-O-Si bonds between the -OH groups of silica sol did not change the crystalline structure of wood cell walls. This in-situ formulating composite significantly improved the compact microstructure, thermal and mechanical properties, and hydrophobicity of the composites.