表面截留聚乳酸的壳聚糖纤维的制备及其与聚乳酸的相容性

Preparation of Surface Modified Chitosan Fiber by Entrapping Poly(D,L-Lactic Acid) to Improve Its Compatibility with Poly(L,L-Lactic Acid)

为了提高壳聚糖纤维和聚乳酸的相容性,采用表面截留法用消旋聚乳酸(PDLLA)对壳聚糖(CS)纤维表面进行修饰。在此基础上,利用模压成型法制备了修饰前后的CS纤维与左旋聚乳酸(PLLA)复合材料,并对CS纤维和基体PLLA之间的相容性进行了分析。研究结果表明:CS纤维表面成功截留了PDLLA分子,截留法修饰的CS纤维表面形态保持较为完好。与基体PLLA的界面黏结性和相容性得到了提高,修饰后的CS纤维明显提高了复合材料的抗弯性能。

To improve the compatibility of chitosan（CS） fiber with poly（L,L-lactic acid）（PLLA）,surface entrapment process was used to modify CS fiber with PDLLA oligomer.Then,the composites of CS fiber before and after entrapment process and PLLA were prepared by molding press.The compatibility of CS fiber with PLLA was studied.Results show that PDLLA is entrapped on the surface of CS fiber,and the morphology of the fiber is perfect after the entrapment process.The interfacial cohesion and consistence between CS fiber after entrapment process and PLLA matrix are improved.CS fiber after entrapment process could enhance the bend properties of composites.