文献类型：期刊文献

英文题名：THERMAL, MECHANICAL, AND MOISTURE ABSORPTION PROPERTIES OF WOOD-TiO2 COMPOSITES PREPARED BY A SOL-GEL PROCESS

作者：Wang, Xiaoqing[1] Liu, Junliang[1] Chai, Yubo[1]

第一作者：王小青

通信作者：Wang, XQ[1]

机构：[1]Chinese Acad Forestry, Res Inst Wood Ind, Beijing 100091, Peoples R China

年份：2012

卷号：7

期号：1

起止页码：893-901

外文期刊名：BIORESOURCES

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000304041200069)】；

基金：This work was financially supported by the Fundamental Research Funds of the Institute of New Forest Technology, Chinese Academy of Forestry (CAFINT2011C05).

语种：英文

外文关键词：Dimensional stability; Moisture absorption; Sol-gel; Thermal analysis; TiO2

摘要：Wood-TiO2 (titania) composites were prepared by a sol-gel process, in which wood was impregnated with the precursor solutions prepared from tetrabutyl titanate (TBT), followed by a curing step. The surface morphology and moisture absorption behavior of the wood composites, as well as their thermal and mechanical performances, were examined. Environmental scanning electron microscopy (ESEM) analysis revealed that TiO2 gels were deposited principally in the cell lumens and partly in the cell walls, as confirmed by the energy dispersive X-ray (EDX) analysis. By this inorganic modification, the hygroscopicity of wood was significantly reduced and its dimensional stability was improved consequently. Greater amounts of TiO2 gel deposited in the cell lumens were not helpful in enhancing the hygroscopicity of wood. Thermal analysis (TG-DTA) showed that the incorporation of TiO2 gel retarded the thermal decomposition of wood matrix and improved the thermal stability of wood. The incorporated inorganic gel seemed to stiffen the wood cell walls, as indicated by the increased resistance of the wood composites to deformation and collapse in compression.