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当前位置: 首页 > 文章 > 木材-纳米SiO_2气凝胶复合材料结构的FTIR表征 东北林业大学学报 2006,34 (5) 51-52
Position: Home > Articles > Characterization of Chemical Structure of Wood-nano-SiO_2 Aerogel Composites by FTIR Journal of Northeast Forestry University 2006,34 (5) 51-52

木材-纳米SiO_2气凝胶复合材料结构的FTIR表征

作  者：
隋淑娟;邱坚;李坚
单  位：
生物质材料科学与技术教育部重点实验室(东北林业大学);西南林学院
关键词：
溶胶-凝胶法;超临界干燥;SiO2气凝胶;木材-纳米SiO2气凝胶复合材料
摘  要：
在催化剂存在下,使正硅酸乙酯与乙醇-水溶液混合制备硅醇溶胶,迅速将其分别注入到西南桤木和紫椴木材中,令其在室温下反应100min左右得到木材-凝胶,然后采用超临界干燥技术制备木材-SiO2气凝胶。应用FTIR方法对上述溶胶-凝胶法木材-SiO2气凝胶复合材料的结构进行了表征,结果表明,复合材料的FTIR特征基本上是由木材与SiO2气凝胶谱图加合而产生的,没有得到木材与SiO2气凝胶产生化学结合的明确证据,但是观察到气凝胶中Si—OH结构信息(844cm-1);部分木材-SiO2气凝胶复合材料试样中1735cm-1吸收峰强度明显降低,说明不当的制备工艺条件有可能造成木材中半纤维素发生降解。
译  名：
Characterization of Chemical Structure of Wood-nano-SiO_2 Aerogel Composites by FTIR
作  者：
Sui Shujuan(the Key Laboratory of Bio-based Material Science and Technology of Ministry of Education, Northeast Forestry University, Harbin 150040, P. R. China); Qiu Jian(Southwest Forestry College); Li Jian(the Key Laboratory of Bio-based Material Science and Technology of Ministry of Education, Northeast Forestry University)
关键词：
Sol-gel method; Supercritical drying; SiO_2 aerogel; Wood-nano-SiO_2 aerogel composites
摘  要：
In the presence of a catalyst, ethyl silicate was mixed with ethanol-water solution to form silica sol, which was impregnated into Alnus nepalensis and Tilia amurensis wood as soon as possible. After a reaction time of about 100min at room temperature, the silica sol was transformed into solgel, which was dried by supercritical drying technique to obtain wood-nano-SiO_2 aerogel. The chemical structure of wood-nano-SiO_2 aerogels were studied by Fourier Transformation Infrared Spectroscopy (FTIR). Results showed that the FTIR spectrum of wood-nano-SiO_2 aerogel composite was basically the sum of the spectra of wood and SiO_2 aerogel, no strong chemical bonding between wood and SiO_2 aerogel was observed clearly, though the structure of Si—OH was recorded (844cm~ -1 ). The 1735cm~ -1 peak in some wood-nano-SiO_2 aerogel composites decreased clearly compared with that in the untreated wood, which indicates that improper treating process or treating conditions for the composite preparation might cause wood components, especially hemicellulose to dehydrate, resulting in wood degradation.

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