摘要
为了改善木纤维的尺寸稳定性,以硅溶胶-凝胶法制备木纤维/二氧化硅复合材料。结果表明:改性后杨木纤维的质量增加率随溶胶浓度的下降而减小,但溶胶粒子更易进入细胞壁中;为保持木材孔隙结构,采用抽真空的方法将纤维表面和细胞腔中过剩溶胶抽出,木纤维质量增加率先增加后减少;通过扫描电镜能谱仪分析,硅基本处于细胞壁位置;傅里叶变换衰减红外光谱分析显示处理后的木纤维中有Si—O—Si键生成。硅溶胶改性后,杨木纤维板的尺寸稳定性得到一定程度的提高。
Poplar wood fiber-SiO2 composites were prepared via a sol-gel process for improving dimentional stability of fiberboards.The results showed that weight percent gain of wood fibers was reduced along with decreasing the concentration of the sol,but the gel particle was easy to permeate through the cell wall at low concentration.In order to keep the porous structure of wood fiber,the surplus sol on the surface and in the lumen was drawn out by vacuum.SiO2 gel could be found in wood cells by scanning electron microscope-energy dispersive analysis.Si—O—Si bond was found from fourier transform infrared spectrophotometer.The dimentional stability of board was improved at a certain extent after modification by SiO2 gel.
出处
《南京林业大学学报（自然科学版）》
CAS
CSCD
北大核心
2011年第1期75-78,共4页
Journal of Nanjing Forestry University：Natural Sciences Edition
基金
国家自然科学基金项目(30771676)
江苏省自然科学基金项目(BK20081842)
