苎麻纤维增强聚丙烯复合材料的性能研究

Study on the Property of Ramie Roving Reinforced Polypropylene Composite

用偶联剂对苎麻纤维进行改性处理,研究了偶联剂处理浓度及苎麻用量对聚丙烯/苎麻增强复合材料力学性能的影响。结果表明:随着苎麻纤维用量的增加,复合材料的拉伸强度和弯曲强度都随之提高,其中经偶联剂处理复合材料的力学性能提高幅度较大;偶联剂处理浓度为1%时,材料的拉伸强度最高。SEM观察发现:未经处理的苎麻纤维表面较光滑,而经偶联剂处理的苎麻纤维表面较粗糙,并黏附了聚丙烯基体,说明偶联剂的添加改善了复合体系的界面相容性,界面结合力提高。

The ramie fiber was modified with coupling agent,and the effects of coupling concentration and ramie fiber content on the mechanical properties of PP/ramie fiber was researched.The results show that： the tensile strength and bending strength of the composite improve with the increase of ramie fiber content,especially the mechanical properties of the composite treated with coupling agent improve greatly;the surface of ramie fiber modified with coupling agent is rougher than that of unmodified ramie fiber,and the PP matrix attached to it.It means with the adding of coupling agent,the interfacial compatibility of composite are improved,and the interface bonding force is increased.