| SiO_2凝胶/木材复合材料制备 |
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| 引用本文： | 陈志林,傅峰,叶克林,王群,左铁镛.SiO_2凝胶/木材复合材料制备[J].北京工业大学学报,2010,36(2). |
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| 作者姓名： | 陈志林 傅峰 叶克林 王群 左铁镛 |
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| 作者单位： | 中国林业科学研究院木材工业研究所;北京工业大学材料科学与工程学院; |
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| 基金项目： | 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) |
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| 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.
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| 关 键 词： | 正硅酸乙酯 溶胶-凝胶 SiO_2/木材复合材料 |
Preparation of the SiO_2 Gel/Wood Composites From TEOS Sol With Hydrolyzing |
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| CHEN Zhi-lin,FU Feng,YE Ke-lin,WANG Qun,ZUO Tie-yong.Preparation of the SiO_2 Gel/Wood Composites From TEOS Sol With Hydrolyzing[J].Journal of Beijing Polytechnic University,2010,36(2). |
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| Authors: | CHEN Zhi-lin FU Feng YE Ke-lin WANG Qun ZUO Tie-yong |
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| Affiliation: | 1.Research Institute of Wood Industry;Chinese Academy of Forestry;Beijing 100091;China;2.College of Material Science and Engineering;Beijing University of Technology;Beijing 100124;China |
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| Abstract: | 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 indicates that the gel is noncrystal SiO_2.The method of producing SiO_2 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%. |
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| Keywords: | tetraethoxysilane(TEOS) sol-gel SiO_2 gel/wood composites |
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