PLA/PBAT/OMMT纳米复合材料微观结构调控  

Tuning of Microstructure of PLA/PBAT/OMMT NNaannoo composite

作　　者：王翔宇[1] 张玉霞[1] WANG Xiangyu;ZHANG Yuxia(School of Materials and Mechanical Engineering,Beijing Technology and Business University,Beijing 100048,China)

机构地区：[1]北京工商大学材料与机械工程学院,北京100048

出　　处：《中国塑料》2020年第4期35-41,共7页China Plastics

摘　　要：利用环氧基化合物ADR在转矩流变仪中将PLA锚固到OMMT上,然后将所得PLA/OMMT/ADR体系与PBAT复配,制备(PLA/OMMT/ADR)/PBAT纳米复合材料。对不同体系的表面张力及相间的界面张力进行了测试,计算得到PLA和PBAT分别与OMMT间的浸润系数;借助TEM和SEM对相关体系的微观结构进行了观察和分析。结果表明,OMMT上锚固了PLA;随着ADR含量增加,浸润系数减小,使OMMT由倾向于分布在PLA与PBAT界面处逐渐转变为倾向于分布于PLA相的一侧;OMMT以剥离状态均匀分布于(PLA/OMMT/ADR)/PBAT体系中,这归因于ADR的加入改善了PLA与PBAT间的亲和性,促使OMMT向PLA与PBAT界面处及PBAT相中迁移;随着ADR用量的增加,PLA与PBAT相界面变得模糊,相容性改善。PLA is anchored onto OMMT in a torque rheometer by ADR,and the resultant PLA/OMMT/ADR is compounded with PBAT to make(PLA/OMMT/ADR)/PBAT nanocomposite.Facial tension of various composites and interfacial tension between different phases were calculated by testing the contact angle,leading to the wetting coefficient between PLA and PBAT and OMMT,respectively.Microstructure of the nanocomposite was observed by TEM and SEM.IR-FT shows that PLA was anchored onto OMMT.With the increasing of ADR,the wetting coefficient between different phases decreased,leading to the transformation of OMMT in the interfaces between PLA and PBAT to PLA domain.It can be seen from TEM that OMMT was exfoliated and well distributed in(PLA/OMMT/ADR)/PBAT system,which is attributed to the improvement of affinity between PLA and PBAT,as well as the movement of OMMT from PLA domains to the interfaces between PLA and PBAT and PBAT domains.Pictures from SEM shows that with the increasing loading of ADR,the interfaces between PLA and PBAT became blurred,which means the increase of the compatibility between PLA and PBAT.

关 键 词：聚乳酸 聚己二酸/对苯二甲酸丁二醇酯 有机改性蒙脱土 纳米复合材料 微观结构 调控 

分 类 号：TQ321[化学工程—合成树脂塑料工业]