MMT/PLA/PBAT复合材料的制备与性能研究  

Preparation and Properties Study of MMT/PLA/PBAT Composites

作　　者：徐淑伟 陈玉 杨科 卢伟东[4] 洪有针 吴强[1] XU Shuwei;CHEN Yu;YANG Ke;LU Weidong;HONG Youzhen;WU Qiang(College of Chemistry and Materials Engineering,Zhejiang A&F University,Hangzhou 311300,China;Service Center of Science and Technology Innovation,Hangzhou 311300,China;Hangzhou Zhuopu New Materials Technology Co.,Ltd.,Hangzhou 311300,China;Hangzhou Xinguang Plastic Co.,Ltd,Hangzhou 311201,China)

机构地区：[1]浙江农林大学化学与材料工程学院,浙江杭州311300 [2]杭州市临安区科技创新服务中心,浙江杭州311300 [3]杭州卓普新材料科技有限公司,浙江杭州311300 [4]杭州新光塑料有限公司,浙江杭州311201

出　　处：《塑料科技》2025年第3期82-87,共6页Plastics Science and Technology

基　　金：2024年度临安区-浙江农林大学区校合作项目。

摘　　要：采用转矩流变仪制备纳米蒙脱土/聚乳酸/聚己二酸-对苯二甲酸丁二醇酯(MMT/PLA/PBAT)复合材料,考察MMT含量对PLA/PBAT复合材料力学性能、薄膜水蒸气阻隔性能、结晶行为、流变行为及断面微观结构的影响。结果表明:MMT的加入提升了PLA/PBAT材料的弹性模量,强度和断裂伸长率略有下降,但显著提升了PLA/PBAT薄膜的水蒸气阻隔性能。当MMT质量分数为8%时,水蒸气透过率降低了43.7%。热力学研究表明,MMT的加入提高了PBAT的结晶温度和结晶度,表明MMT在PBAT中起到成核剂的作用。流变行为研究表明,MMT在PLA/PBAT基体中形成网络结构,提升熔体强度。研究结果可为开发具有高水蒸气阻隔的PLA/PBAT薄膜提供参考。Nano-montmorillonite/polylactic acid/polybutylene adipate terephthalate(MMT/PLA/PBAT)composites were prepared by torque rheometer.The influence of MMT content on the mechanical properties,water vapor barrier properties,crystallization behavior,and rheological behavior of PLA/PBAT composites were investigated.The results showed that the incorporation of MMT enhanced the elastic modulus of PLA/PBAT materials,with a slight decrease in tensile strength and elongation at break.The addition of MMT significantly improved the water vapor barrier performance of PLA/PBAT films,the water vapor transmittance decreased by 43.7%when the MMT mass fraction was 8%.Thermodynamic studies demonstrated that the incorporation of MMT elevated the crystallisation temperature and crystallinity of PBAT,thereby indicating that MMT acted as a nucleating agent for PBAT.Rheological behavior studies showed that MMT formed a network in PLA/PBAT matrix which can improve the melt strength.The study provided references for the development of high-performance PLA/PBAT films with enhanced water vapor barrier properties.

关 键 词：聚己二酸-对苯二甲酸丁二醇酯 聚乳酸 纳米蒙脱土 水蒸气阻隔性 流变行为 

分 类 号：TB332[一般工业技术—材料科学与工程]