原位共聚共混制备改性纤维素聚乳酸复合材料  

Preparation of in-situ Grafted and blended Composites of Cellulose-g-PLA/PLA

作　　者：杨健 李小保[2] 叶菊娣 洪建国 黄婧琦 

机构地区：[1]双维伊士曼纤维有限公司,安徽合肥230301 [2]南京林业大学化学工程学院,江苏南京210037 [3]南京林业大学生物与环境学院,江苏南京210037 [4]南京外国语学校,江苏南京210018

出　　处：《广东化工》2017年第18期63-65,9,共4页Guangdong Chemical Industry

基　　金：林业公益性行业科研专项;201204803;江苏省自然科学基金面上项目;NO.BK20131425

摘　　要：本文以纤维素与乳酸为原料,辛酸亚锡为催化剂,在乳酸体系中制备纤维素聚乳酸接枝共聚物/聚乳酸(CF-g-PLA/PLA)复合材料。采用IR、XRD、SEM、TG、DSC以及电子万能试验机对复合材料进行了表征和力学性能的测试。实验结果表明,在辛酸亚锡的催化下,乳酸脱水生成的丙交酯成功地对纤维素进行了原位接枝共聚改性,改性纤维素与体系中同时生成的聚乳酸原位共混得到CF-g-PLA/PLA复合材料;改性纤维素与聚乳酸具有较好的界面相容性。随着改性纤维素比例的增加,复合材料的热稳定性略有下降,其Tg则略微提高,弯曲强度有较明显的改善。适量加入纤维素会提高复合材料的拉伸性能,过量反而使得拉伸性能下降。Composites of cellulose-g-PLA/PLA were prepared in-situ from cellulose and poly lactic acid （PLA） in lactic acid by Sn（Oct）2 as catalysts. The composites were characterized by IR, XRD, SEM, TG, DSC and electronic universal testing machine. The results show that cellulose were grafted with tactide generated from lactic by Sn（Oct）2 as catalysts, and the composites of cellulose-g-PLA/PLA were prepared in situ successfully via blending the modified cellulose and PLA generated in the system. With the increase of modified cellulose, the thermal stability of the composite declined slightly, its Tg increased slightly, and the flexural properties were improved. The tensile properties of the composites could be improved by adding optimal amounts of cellulose, but the properties declined because of excessive cellulose.,

关 键 词：纤维素 聚乳酸 原位接枝 原位共混 复合材料 

分 类 号：O632.5[理学—高分子化学]