Chemical and Physical Changes for Dimensionally Stability of Compressed Wood

摘要：

The objective of this study was to determine the chemical and physical changes of chemical modified on poplar wood. The chemical modifier was impregnated into cell lumen space by pulse-dipping machine to improve the dimension stability and mechanical property of timber. The timbers were compressed and dried by the multilayer hot-press drying to produce the modified timber. The modified timber had better dimension stability than the natural wood when they were immerged water continuous eight-hour. Characteristics of Fourier Transform Infrared Spectroscopy (FTIR) for modified were studied by the FTIR spectrometer. The intensity of hydroxyl absorption peak in the infrared absorption spectrogram decreased significantly, and that of carbonyl decreased lightly, which due to the bond of the function groups of -NHCH2OH of ureaformaldehyde prepolymer react with the wood carboxyl (C=O) and hydroxyl(-OH). The morphologic models of chemical within wood were discovered by SEM.

关键词： Chemical Modified Compressed Wood Urea-Formaldehyde Prepolymer Crosslinking Mechanism

作者: Guofeng Wu Yifei Jiang Hao Zhang Bin Wang Heyu Chen Junwen Pu

作者单位: College of Material Science and Technology,Beijing Forestry University,Beijing,Qinghua East Road No.35,100083,China

会议类型: 国际会议

会议名称: 2010 International Conference on Material and Manufacturing Technology(2010材料与制造技术国际会议 ICMMT2010)

会议地点: 重庆

会议语种:英文

页码: 46-49

在线出版日期: 2010-09-17（万方平台首次上网日期，不代表论文的发表时间）