硅烷偶联剂对PLA/木粉复合材料性能的影响  

Effect of Silane Coupling Agent on Properties of PLA/Wood Flour Composites

作　　者：周长奉 彭培辉 吴彩茵茵 邹侃志 唐荣[1] 张彦华[1] 

机构地区：[1]东北林业大学材料科学与工程学院,黑龙江哈尔滨150040

出　　处：《塑料科技》2014年第12期85-89,共5页Plastics Science and Technology

基　　金：国家级大学生科技创新基金项目(201410225102);国家青年自然科学基金项目(31200442)

摘　　要：以30%木粉和70%聚乳酸(PLA)为原料,加入1%的硅烷偶联剂,通过熔融共混的方法制备了PLA/木粉复合材料,并研究了不同类型硅烷偶联剂对PLA/木粉复合材料结晶性能、热性能、力学性能和吸水率的影响。XRD结果表明:偶联剂KH-550明显降低了复合材料的结晶度,提高了木粉与PLA之间的相容性;热分析结果表明,偶联剂的加入使复合材料的冷结晶温度下降,热稳定性也稍有下降;力学性能测试结果表明:偶联剂的加入改善了复合材料的力学强度,且KH-550的改性效果较好;另外,KH-550的加入还增加了复合材料的耐水性。PLA/wood flour composites with 1% silane coupling agent were prepared by melt blending method with 30% wood powder and 70% poly lactic acid （PLA） as raw materials. The effect of different types of silane coupling agent on the crystallization behavior, thermal properties, mechanical properties and water absorption rate of PLAJwood flour composites were studied. The XRD results show that KH-550 decreases the crystallinity of composites obviously, which results in improving the compatibility between wood flour and PLA. Thermal analysis results show that with the addition of coupling agent, the cold crystallization temperature of composites decreases and the thermal stability also decreases slightly. The mechanical strength of composites improves with the addition of coupling agent, and the KH-550 has better modification effect on the mechanical strength of composites. Moreover, the addition of KH-550 also increases the water resistance of PLA/wood flour composites.

关 键 词：聚乳酸 木粉 硅烷偶联剂 复合材料 

分 类 号：TQ264.12[化学工程—有机化工] TB332[一般工业技术—材料科学与工程]