杉木-纳米TiO_2复合材料结构表征及复合机理分析  

Study on structure characterization and mechanism of Chinese fir /nano-TiO_2 composite

作　　者：袁光明[1] 刘天柱 张南南[1] 宫飞飞[1] 陈超[1] 

机构地区：[1]中南林业科技大学材料科学与工程学院,湖南长沙410004 [2]通道县林业局,湖南通道418500

出　　处：《中南林业科技大学学报》2012年第1期56-60,共5页Journal of Central South University of Forestry & Technology

基　　金：国家自然科学基金项目(30972305;30871976;31071496);国家林业公益性行业科研专项(200704020);中南林业科技大学木材科学与技术国家重点学科资助项目

摘　　要：通过SEM、TEM表征了杉木-纳米TiO2复合材料的结构,并基于二元复合理论,结合XRD、EDXA及XPS等分析其复合机理。结果表明:纳米TiO2粒子极易与杉木木材组分中的氧键结合,形成原位复合,其表面存在的不饱和残键和羟基,与杉木组分中的羟基、乙酰基及羧基等形成化学结合;有机相(木材组分)与无机相(纳米TiO2粒子)以共价键或部分共价键紧密联接,可使两相界面完全或部分消失,从而使复合材料性能显著提高。The structure of the Chinese fir/nano-TiO2 composite is characterized by SEM, TEM etc.. Based on duality composite theory, by using XRD, EDXA and/or other spectroscopy etc., the composite mechanism is analyzed. The results show that nano-TiO2 particles can be easily bonded with the oxygen inside the wood and formed in-situ composite. On the surface of nano-TiO2 particles, there areunsaturated residual bonds and hydroxy, which combined in chemical state with hydroxyl, acetyl and carboxyl etc. inside the wood. The organic phase（wood components） are connected closely to the inorganic phase（nano-Ti02 particles） in the forms of covalent bond or partial covalency, Which will cause the interface of the two phase wholly or partly disappearing, thus obviously promoting theperformance of the composite material.

关 键 词：杉木-纳米TiO2 复合材料 结构表征 结合机理 

分 类 号：S784[农业科学—林学] TB332[一般工业技术—材料科学与工程]