蒙脱土/硅烷改性木粉/PVC复合材料  

Properties of montmorillonite/silane-modified wood flour/PVC composites

作　　者：赵永生[1] 王克俭[1] 朱复华[1] 薛平[1] 包文春 赵雁鸣 

机构地区：[1]北京化工大学塑机所,北京100029 [2]北新建材集团有限公司,北京100096

出　　处：《复合材料学报》2007年第3期63-71,共9页Acta Materiae Compositae Sinica

基　　金：北京化工大学青年教师科研基金项目(QN0612)

摘　　要：用硅烷YH-62对木粉(WF)和插层蒙脱土(OMMT)进行表面改性,熔融共混挤出制备了OMMT/硅烷改性木粉(STWF)/聚氯乙烯(PVC)复合材料。分析了硅烷改性和添加蒙脱土含量对材料力学性能的影响。用X射线衍射(XRD)、透射电镜(TEM)和扫描电镜(SEM)观察了蒙脱土的插层和分散效果,用傅立叶红外光谱(FT-IR)、X射线光电子能谱(XPS)研究了硅烷改性效果,分析了表面接枝反应机理。结果表明,硅烷偶联剂与木粉形成了有效的化学键,并能够与OMMT表面产生化学连接,改善木粉与PVC及蒙脱土间的界面相容性,提高了木塑材料的力学性能。在适量加入OMMT后,木塑材料的力学性能得到了进一步改善。但含量过高,会形成厚界面层,甚至使OMMT和木粉团聚,分布不均匀,引起性能降低。The surfaces of intercalated montmorillonite （OMMT） and wood flour （WF） were modified by silane coupling agent Ti-14. They were melt-blended and extruded into wood plastic composites samples. The effects of the contents of OMMT and WF on the composites mechanical properties were investigated. The intercalation and dispersion of OMMT were observed by XRD, TEM and SEM. FTIR and XPS were used to analyze the silane modification effects. The reaction mechanisms were proposed. The grafting improves the interracial compliance between components and results in higher properties of the composites. Adding OMMT can reinforce further the composites. However, a thicker interracial layer which is weak will form and the stress-concentration will impair the composites properties when the contents of OMMT or coupling agent are higher.

关 键 词：木塑复合材料 木粉 硅烷偶联剂 插层蒙脱土 PVC 

分 类 号：TB332[一般工业技术—材料科学与工程] TQ325.3[化学工程—合成树脂塑料工业]