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林产化学与工业 ›› 2011, Vol. 31 ›› Issue (1): 41-46.

• 研究报告 • 上一篇    下一篇

MMT/PVA/木材复合材料的物理力学性能

姜卸宏, 曹金珍, 罗冠群   

  1. 北京林业大学 材料科学与技术学院, 北京 100083
  • 收稿日期:2010-07-13 修回日期:1900-01-01 出版日期:2011-02-28 发布日期:2011-02-28
  • 通讯作者: 曹金珍,博士生导师,研究领域:木材防腐;E-mail:caoj@bjfu.edu.cn。

Physical and Mechanical Properties of MMT/PVA/Wood Composites

JIANG Xie-hong, CAO Jin-zhen, LUO Guan-qun   

  1. Faculty of Materials Science and Technology, Beijing Forestry University, Beijing 100083, China
  • Received:2010-07-13 Revised:1900-01-01 Online:2011-02-28 Published:2011-02-28

摘要: 分别采用一步法和两步法制备聚乙烯醇(PVA)和有机蒙脱土(MMT)的复合处理液,复合处理液通过满细胞法真空加压浸注杉木试材,制备MMT/PVA/杉木材复合材料(PVDMW)。测定了PVDMW的吸水率、抗胀缩率(AS)、表面硬度、顺纹抗压强度和抗水流失性,同时采用红外光谱分析(FT-IR)对两种方法机理进行分析。研究结果表明:一步法复合材料(PVDMW-1)的AS和抗水流失性明显优于两步法复合材料(PVDMW-2),而吸水率和抗压强度两者无明显差异,表面硬度则是PVDMW-2优于PVDMW-1;FT-IR结果表明:PVDMW-1在521和468cm-1附近出现了表征蒙脱土中Si—O—M(金属阳离子)和M—O的耦合振动的吸收峰,表明PVDMW-1中蒙脱土进入了木材细胞壁内。

关键词: 杉木, 蒙脱土(MMT), 聚乙烯醇(PVA)

Abstract: Composite treating solutions from polyvinyl alcohol((PVA) and organic montmorillonite(MMT) were prepared through one-step and two-step method respectively and used to impregnate Chinese fir(Cunninghamia lanceolata)sapwood specimens by full-cell vacum-pressure process to produce MMT/PVA/wood composite(PVDMW).The water adsorption, antishrinking efficiency(AS), surface hardness, compression strength parallel to grain and leaching resistance of composites prepared through two methods were determined. Fourier transform infrared spectroscopy(FT-IR)was used to analyze its mechanism of improving the properties of wood. The results showed that AS and leaching resistance of PVDMW-1 prepared by one-step method were obviously higher than PVDMW-2 prepared by two-step method, while water absorption and compressive strength parallel to grain of both composites were similar, and the surface hardness of PVDMW-2 was higher than that of PVDMW-1. From FT-IR analysis, the characteristic peaks of MMT were observed in PVDMW-1. It suggested that MMT entered into the wood cell wall in the composite prepared by one-step method.

Key words: Chinese fir, montmorillonite, polyvinyl alcohol

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