超临界干燥制备木材-SiO_2气凝胶复合材料及其纳米结构  

Preparation of Wood-Silica Aerogels Composites by Supercritical Drying Technique and Its Nano-structure

作　　者：邱坚[1] 李坚[1] 

机构地区：[1]东北林业大学,哈尔滨150040

出　　处：《东北林业大学学报》2005年第3期3-4,28,共3页Journal of Northeast Forestry University

基　　金：国家自然科学基金资助项目(30271051)。

摘　　要：采用溶胶-凝胶法和超临界干燥技术制备了木材-SiO2气凝胶,应用XRD、SEM、TEM等方法对气凝胶样品和木材-SiO2气凝胶复合材料的结构和物理性能进行了表征.结果表明:所制备SiO2气凝胶是连续网络的非晶态纳米多孔固体,其基本粒子的平均直径17～96 nm,SiO2气凝胶与木材有良好的结合并保持木材的空隙结构.Silica aerogels-wood was prepared by sol-gel process and supercritical drying technique. By means of XRD, SEM, TEM and some other experimental methods, the structure and physical property of silica aerogel-wood samples were primarily investigated. The result showed that the prepared silica aerogels were coherent, non-crystalline, nano-sized porous solids. The mean diameter of particles was about 17~96 nm. Silica aerogels compacted with wood very well and the porous structure of wood could be maintained.

关 键 词：溶胶-凝胶法 超临界干燥技术 SIO2气凝胶 木材-SiO2 气凝胶纳米复合材料 纳米结构 

分 类 号：S781.7[农业科学—木材科学与技术]