文献类型：期刊文献

中文题名：SiO_2凝胶/木材复合材料制备

英文题名：Preparation of the SiO_2 Gel/Wood Composites From TEOS Sol With Hydrolyzing

作者：陈志林[1] 傅峰[1] 叶克林[1] 王群[2] 左铁镛[2]

第一作者：陈志林

通信作者：Chen, Z.-L.

机构：[1]中国林业科学研究院木材工业研究所;[2]北京工业大学材料科学与工程学院

年份：2010

期号：2

起止页码：250-254

中文期刊名：北京工业大学学报

外文期刊名：Journal of Beijing University of Technology

收录：CSTPCD;;EI(收录号：20101612869078);Scopus(收录号：2-s2.0-77950968972);北大核心:【北大核心2008】；CSCD:【CSCD2011_2012】；

基金：国家'十一五'计划资助项目(2006BAD18B06);国家林业局重点研究资助项目(2006-53)

语种：中文

中文关键词：正硅酸乙酯;溶胶-凝胶;SiO2/木材复合材料

外文关键词：tetraethoxysilane （TEOS） sol-gel; SiO2 gel/wood composites

分类号：TB332

摘要：以正硅酸乙酯为前驱液,通过水解获得溶胶,其固体质量分数为23.6%,常温下48 h后测定黏度为20 s,所得凝胶经过红外光谱分析,在1087.8 cm-1处出现强烈的Si—O—Si的反对称伸缩振动吸收峰,X线衍射表明,该凝胶为非晶态SiO2无定型结构.采用先制取溶胶,然后利用自制减压-加压设备,将溶胶灌注入木材内获得的SiO2凝胶/木材复合材料增重率平均为81.3%,比前人制备方法提高了125.2%,而且克服了以往方法水解、缩聚过程缓慢,反应不完全的缺点.
The sol was prepared by hydrolyzed tetraethoxysilane （TEOS）. The solid content of the sol is 23.6%, and the viscosity is 20 s after 48 h. The gel was characterized by XRD and infrared spectroscopy in this paper. The examination results of infrared spectra show there is a characteristic antisymmetric stretching vibration absorption peak of Si--O--Si at 1 087. 8 cm^-1. X-ray analysis indieates that the gel is noncrystal SiO2. The method of producing SiO2 gel/wood composite compound with sol prepared at first and then impregnating sol into the wood issue by negative-positive pressure system overcomes its slow and incomplete defects in hydrolysis-condensation process compared to the former method of impregnating TEOS into the wood issue directly and then forming the sol, and the weight of percentage gain can reach 81.3%.