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木材/二氧化硅复合材料的微细构造

符韵林, 赵广杰

符韵林, 赵广杰. 木材/二氧化硅复合材料的微细构造[J]. 北京林业大学学报, 2006, 28(5): 119-124.
引用本文: 符韵林, 赵广杰. 木材/二氧化硅复合材料的微细构造[J]. 北京林业大学学报, 2006, 28(5): 119-124.
FU Yun-lin, ZHAO Guang-jie. Microstructure of wood-silicon dioxide composite[J]. Journal of Beijing Forestry University, 2006, 28(5): 119-124.
Citation: FU Yun-lin, ZHAO Guang-jie. Microstructure of wood-silicon dioxide composite[J]. Journal of Beijing Forestry University, 2006, 28(5): 119-124.

木材/二氧化硅复合材料的微细构造

基金项目: 

教育部博士点基金项目(20020022011)

生物质材料科学与技术教育部重点实验室开放课题基金(04-03)

详细信息
    作者简介:

    符韵林,博士生.主要研究方向:木材科学.电话:010-62329685 Email:fuyunlin@sina.com 地址:100083 北京林业大学材料科学与技术学院.

  • 中图分类号: S781

Microstructure of wood-silicon dioxide composite

  • 摘要: 为弄清木材/二氧化硅复合材料的微细构造,通过固体膨胀率与增重率的关系、吸湿处理中尺寸变化、X射线衍射分析(XRD)、扫描电子显微镜分析(SEM)及能量色散X射线分析(EDAX)等方法,研究了该复合材料的微观构造特性.结果表明:①木材/二氧化硅复合材料的增重率与含水率成正相关.固体膨胀率随着增重率的增加而增加,弦向固体膨胀率大于径向.尺寸变化率随着增重率的增加而减小.②SEM分析表明,二氧化硅凝胶存在于木材细胞空隙中.EDAX分析表明,气干材、水调湿材制备的木材/二氧化硅复合材料,二氧化硅存在于木材细胞壁中,硅的质量百分含量分别为4.11%、9.22%;饱水材制备的木材/二氧化硅复合材料,二氧化硅存在于细胞壁及细胞腔中,硅的质量百分含量为17.07%.③XRD分析表明,二氧化硅存在于木材细胞壁中,生成的二氧化硅凝胶越多,结晶度越小.
    Abstract: In order to know completely the microstructure of wood-silicon dioxide composite,the authors analyzed the relationship between cell wall expansion percentage and weight gain percentage(WGP),and the dimensional changes during moisture absorption treatment.We used the following techniques or instruments in our analyses: Xray diffraction(XRD),scanning electron microscopy(SEM) and energy dispersive X-ray analyzer(EDAX).Resultsincluded: 1) WGP was proportional to the moisture content of pretreated wood.Cell wall expansion percentage increased with the increase of WGP and tangential cell wall expansion percentage was higher than radial expansion.There was a slightly negative correlation between the percentage of dimensional change and WGP during the moisture absorption treatment.2) SEM analysis showed that silicon dioxide occupied free space of wood.EDAX analysis showed that silicon dioxide was found in cell wall of wood for the air-dried and moistening pretreatment of wood,and in both cell wall and cell cavity for the water saturated wood.The percentages of quality silicon in wood-silicon dioxide composite prepared from air-dried,moistening and water saturated wood were 4.11%,9.22% and 17.07%.3) XRD analysis showed that silicon dioxide was also found in cell wall of wood.Its crystallinity decreased with an increase of silicon dioxide content in wood-silicon dioxide composite.
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出版历程
  • 收稿日期:  2005-10-29
  • 网络出版日期:  2024-05-14

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