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当前位置: 首页 > 文章 > 功能型改性剂对轻木性能的影响 西南林业大学学报(自然科学) 2014 (3) 89-94
Position: Home > Articles > Effect of Modification with Modifiers on Physical and Mechanical Properties of Balsa Wood Journal of Southwest Forestry University(Natural Sciences) 2014 (3) 89-94

功能型改性剂对轻木性能的影响

作  者：
谢序勤;邱坚;李君
单  位：
云南省木材胶黏剂及胶合制品重点实验室
关键词：
轻木;改性剂;化学改性;木材性能;红外光谱图
摘  要：
以人工林轻木为研究对象,采用酚醛树脂和壳聚糖2种不同功能类型的改性剂对试件进行改性处理,并用傅立叶变换红外光谱仪、X射线衍射仪对改性前后木材的相关性能进行表征,分析改性前后木材性能的变化。结果表明,PF树脂改性后,轻木的抗胀率和阻湿率达到30%左右,端面硬度、径面硬度和顺纹抗压强度分别提高29.7%,25.0%,50.0%;单位质量的壳聚糖对轻木力学性能的贡献是PF树脂的4~8倍。红外光谱图表明,改性剂与木材内部基团发生交联反应。X射线衍射仪测试表明,木材改性剂使木材结晶区域宽度均增加约0.2 nm,其中PF处理后轻木的相对结晶度提高4.0%,而壳聚糖处理后的轻木相对结晶度提高约12.2%。
译  名：
Effect of Modification with Modifiers on Physical and Mechanical Properties of Balsa Wood
作  者：
XIE Xu-qin;Qiu Jian;LI Jun;Yunnan Key Laboratory of Wood Adhesives and Glue Products,Southwest Forestry University;College of Materials Engineering,Southwest Forestry University;
关键词：
balsa wood;;modifiers;;chemical modification;;properties of wood;;infrared spectrogram
摘  要：
Modification treatment of balsa wood was conducted through 2 wood modifiers of phenol-formaldehyde resin and chitosan,and compared the characteristics of the treated and untreated wood with X-ray diffractometer( XRD),and Fourier transform infrared( FTIR) spectrophotometer. Results indicated that the ASE and MEE reached around 30%,and the surface hardness and compressive strength parallel grain of the treated wood increased by about 29. 7%,25. 0% and 50. 0% after PF impregnation,respectively. The chitosan had the better effect of modification than PF because the chitosan had the 4- 8 times increments on physical properties of wood than PF. The FTIR and XRD spectra test showed that there was cross-linking reaction between the modifier and the internal parts of the wood. And the modifier could increase the width of crystal region about 0. 2 nm,and the relative crystallinity of balsa wood was increased by 4. 0% after PF treatment. Moreover,chitosan had an obvious effect on the relative crystallinity of balsa wood,increasing it about 12. 2%.

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