酯化、醚化改性对木材热性能的影响  

Influence of esterification and etherification on wood thermoplastic properties

作　　者：张彰[1] 孙丰文[1] 张茜[1] 

机构地区：[1]南京林业大学竹材工程研究中心,江苏南京210037

出　　处：《南京林业大学学报（自然科学版）》2009年第6期6-10,共5页Journal of Nanjing Forestry University：Natural Sciences Edition

基　　金：江苏省自然科学基金资助项目(BK2006522);江西省科技攻关项目(050005)

摘　　要：选择马来酸酐、邻苯二甲酸酐和氯化苄作为木材改性剂,对杨木粉进行改性,采用扫描电子显微镜、傅里叶红外光谱、差式扫描量热仪和X射线衍射对改性前后杨木的热性能变化情况进行分析。DSC曲线分析表明,经过酯化、醚化改性后木材的热性能较改性前有不同程度的变化,其中木材经过氯化苄改性后,其玻璃化转化点温度降为100℃左右,具有较好的热塑性能;电镜扫描图与X射线衍射图谱显示,氯化苄改性杨木的微观形态发生了很大变化,木材原有的纤丝线状结构消失,苄基化木材细胞壁内部呈不规则的非结晶结构;红外光谱表明,木材经过氯化苄改性后,羟基被苄基取代,木材醚化效果明显。In this paper, the author chose cis-butanedioic anhydride, 1,2-benzenedicarboxylic anhydride, benzyl chlo- ride as esterification and etherificatiou reagent, on the purpose of researching the diversification of poplar. SEM, IR, DSC,and X-ray diffraction were used for diversification analysis. Using DSC, there are a great many of changes after esterification and etherifieation, especially by benzyl chloride. The benzylate poplar has good thermoplasticity, the melting temperature is about 100℃. The SEM and X-ray results revealed that the thready microstructure of benzylate poplar dis- appear, which had anomalistic noncrystalline microstrueture. The IR revealed that after benzylate, the hydroxide of wood was replaced by benzyl, and the effect of etherification was evident.

关 键 词：木材改性 塑化 马来酸酐 邻苯二甲酸酐 氯化苄 

分 类 号：S781[农业科学—木材科学与技术]