生物降解弹性体粒子/氧化石墨烯纳米复合体系改性聚乳酸  

Poly(lactic acid)Nanocomposites Modified by Biodegradable Elastomer Particles/Graphene Oxide Nanocompound

作　　者：焦贵宾 黎永轩 杨德敬 王庆国[1] JIAO Guibin;LI Yongxuan;YANG Dejing;WANG Qingguo(College of Polymer Science and Engineering,Key Laboratory of Rubber-Plastics,Ministry of Education,Qingdao University of Science and Technology,Qingdao 266042,China)

机构地区：[1]青岛科技大学高分子科学与工程学院,橡塑材料与工程教育部重点实验室,山东青岛266042

出　　处：《青岛科技大学学报(自然科学版)》2025年第1期95-101,共7页Journal of Qingdao University of Science and Technology:Natural Science Edition

基　　金：国家自然科学基金项目(51773104,51373085);山东省重点研发项目(2017GGX20138).

摘　　要：首先制备了羧基封端生物降解聚酯弹性体粒子(CBEP)和氧化石墨烯(GO)片层彼此呈隔离依附状态的CBEP/GO纳米复合粉末,然后将CBEP/GO纳米复合粉末与聚乳酸(PLA)熔融共混,借助CBEP粒子在PLA基体中的良好分散性,将吸附在CBEP粒子表面的GO片层均匀分散在PLA基体中,制备出PLA/CBEP/GO三元纳米复合材料。分析结果表明:GO能够良好分散在PLA基体中;与纯PLA相比,PLA/CBEP/GO三元纳米复合材料的断裂伸长率由纯PLA的4.6%提高至71.0%,且PLA/CBEP/GO三元纳米复合材料的缺口冲击强度提高到纯PLA的1.64倍,同时提高了PLA的热稳定性能和PLA的导电与导热性能。CBEP/GO纳米复合粉末在PLA基体中起到异相成核剂的作用,提高PLA的结晶性能,缩短了PLA的结晶时间。In this paper,carboxyl-terminated biodegradable polyester elastomer particles(CBEP)/graphene oxide(GO)nanocomposite powders in which CBEP particles and GO sheet layers were isolated from each other was prepared,then the CBEP/GO nanocomposite powder was melted and blended with polylactic acid(PLA).With the help of the good disper-sion of CBEP particles in the PLA matrix,the GO sheet layer adsorbed on the surface of the CBEP particles was uniformly dispersed in the PLA matrix,and the PLA/CBEP/GO ternary nanocomposites was fabricated.The results show that GO can be well dispersed in the PLA matrix.Elongation at break of PLA/CBEP/GO ternary nanocomposites is increased from 4.6%of pure PLA to 71.0%,and the notched impact strength of PLA/CBEP/GO ternary nanocomposites is 1.64 times that of pure PLA.Meanwhile,thermal stability,conductivity and thermal conductivity of PLA/CBEP/GO ternary nanocomposites are improved compared with those of pure PLA.The CBEP/GO nanocomposite powder also plays the role of hetero-geneous nucleating agent in the PLA matrix,improving the crystallization performance of PLA,and shortening the crystallization time of PLA.Research of the PLA/CBEP/GO ter-nary nanocomposites is expected to broaden the application of PLA in biomedicine,environ-mental protection materials,electronic appliances and related special fields.

关 键 词：聚乳酸 纳米复合材料 氧化石墨烯 生物降解性 

分 类 号：TB332[一般工业技术—材料科学与工程] TQ323.4[化学工程—合成树脂塑料工业]