生物可降解纤维素/聚乳酸复合薄膜的制备与性能  

Preparation and Characterization of Biodegradable Cellulose/Polylactic Acid Composite Thin Films

作　　者：夏锟峰 王芬[1] 阮蒙[1] 杨仁党[1] 刘德桃[1] 

机构地区：[1]华南理工大学制浆造纸工程国家重点实验室,广东广州510640

出　　处：《高分子材料科学与工程》2014年第1期149-152,156,共5页Polymer Materials Science & Engineering

基　　金：国家自然科学基金资助项目(31000285);广东省教育部产学研结合项目(2012B090600026);梅州高新区现代产业公共服务平台建设项目(B2120603);华南理工大学特种绝缘纸校企合作创新实验室建设项目(Y1110090)

摘　　要：本文中基于低温离子液体平台,以纤维素和聚乳酸为主要原料通过溶液浇铸法制备了一种复合薄膜材料,采用动态力学分析(DMA)、X射线衍射(XRD)、热分析(TG/DSC)及扫描电镜(SEM)对其性能及结构进行了深入研究。研究结果表明,掺杂聚乳酸会提高复合薄膜的断裂伸长率及热稳定性能,但对其结晶结构无影响;通过SEM分析发现,在复合薄膜局部表面出现乳白色颗粒状物质,且不及纯纤维素薄膜表面平滑;经氯仿刻蚀处理后,薄膜表面更为粗糙且局部出现小孔状;与纯纤维素薄膜相比,复合薄膜具有良好的耐酸碱性能和生物可降解性能。ABSTRACT-A solution-casting method was applied to prepare the films using ILs, cellulose and polylactic acid as the raw materials. The properties and structures of the films were investigated by DMA, XRD, TG/DSC and SEM analysis. The experimental results show that doping polylactic acid in the cellulose films increases the elongation at break and thermal stabilities of the composite films, but its crystal structure does not change. SEM analysis indicates that some creamy white particles appear in the composite films, of which the surface seems less smooth than that of the pure cellulose films. After the etching treatments by chloroform, the composite films seem coarser, and smaller pores are also observed. Compared to the pure cellulose films, the composite films show the perfect acid-alkali- resistance and biodegradability.

关 键 词：纤维素 离子液体 聚乳酸 溶液浇铸法 复合薄膜材料 

分 类 号：O636.11[理学—高分子化学]