立体异构生物基高分子材料成核剂的构效关系研究  

Structure-property Relationships of Stereoisomeric Nucleating Agents for Bio-based Polymer Materials

作　　者：张昊 余莉花 李荣群 刘焱龙[1] 边新超[1] 陈学思[1] ZHANG Hao;YU Lihua;LI Rongqun;LIU Yanlong;BIAN Xinchao;CHEN Xuesi(Key Laboratory of Polymer Ecomaterials,Changchun Institute of Applied Chemistry,Chinese Academy of Sciences,Changchun 130022,China;Pliith Biotechnology Co.,Ltd.,Wuhu 241224,China)

机构地区：[1]中国科学院长春应用化学研究所生态环境高分子材料重点实验室,长春130022 [2]普立思生物科技有限公司,芜湖241224

出　　处：《中国生物工程杂志》2024年第10期1-9,共9页China Biotechnology

基　　金：国家重点研发计划(2021YFD1700700)资助项目。

摘　　要：目的:探究一种代表性的生物基可降解高分子材料聚乳酸的立体异构高分子材料对其结晶的促进效果,并明确此过程中成核剂的构效关系。方法:制备不同分子量的右旋聚乳酸[poly(D-lactic acid),PDLA],研究添加量、结晶温度以及共混加工方式对最终材料的结晶性质、耐热性质以及力学性质的影响;将PDLA与几种常用商业成核剂对聚乳酸的结晶促进效果进行对比,探究此过程的作用机理,验证PDLA作为聚乳酸材料成核剂的可行性。结果:成功制备多种分子量的PDLA生物基高分子材料,明确PDLA分子量与结晶促进效果的关系以及PDLA添加量对聚乳酸材料结晶性能的影响,验证不同共混加工方式以及结晶条件对PDLA的结晶促进效果没有影响,证明经过优选的PDLA的结晶成核效果优于常见市售成核剂。结论:PDLA作为聚乳酸材料的立体异构体,具有高效成核、生物基来源、相容性好、成本低且可降解等优点,可以作为一种成核剂应用于聚乳酸材料体系中。Objective:To explore the crystallization promotion effect of a representative bio-based polymer,poly(lactic acid),on its stereo isomeric polymer material,and to clarify the structure-activity relationship of nucleating agents in this process.Methods:Different molecular weights of poly(D-lactic acid)(PDLA)were prepared,and the effects of the addition amount,crystallization temperature,and mixing method on the crystallization properties,heat resistance,and mechanical properties of the final material were investigated.Finally,the crystallization promotion effect of PDLA and several commonly used commercial nucleating agents on poly lactic acid was compared to explore the mechanism of the experimental results in this process and to verify the feasibility of PDLA as a nucleating agent for poly lactic acid materials.Results:A variety of molecular weight PDLA bio-based polymer materials were successfully prepared,and the relationship between PDLA molecular weight and its crystallization promotion effect was clarified.The influence of PDLA addition on the crystallization properties of poly lactic acid materials was also clarified.It was verified that different mixing methods and crystallization conditions had no effect on the crystallization promotion effect of PDLA,and it was proved that the crystallization nucleation effect of optimized PDLA was superior to that of commercially available nucleating agents.Conclusion:As a stereoisomer of poly lactic acid,PDLA can be used as a nucleating agent in poly lactic acid material systems,with the advantages of high nucleation efficiency,bio-based,good compatibility,low cost,and degradability.

关 键 词：聚乳酸 生物基高分子 成核剂 立体异构 

分 类 号：O632[理学—高分子化学] Q819[理学—化学]