模压成型制备聚乳酸/细菌纤维素衍生物复合材料  

Preparation of Poly(lactic acid)/Bacterial Cellulose Composite Material Using Molded Molding

作　　者：张秀菊[1] 林志丹[1] 李帅[1] 陈文彬[1] 容建华[1] 

机构地区：[1]暨南大学理工学院材料系,广东广州510632

出　　处：《塑料》2010年第5期62-64,共3页Plastics

基　　金：国家自然科学基金(20604010);广东省自然科学基金项目(8451063201000041)

摘　　要：采用模压成型方法制备聚乳酸/细菌纤维素及其衍生物复合材料,并研究细菌纤维素种类和用量对复合材料机械性能、热性能、微观形貌和降解性能等的影响。结果表明:细菌纤维素可以起到增强聚乳酸基体的作用,在低质量含量(≤5%)时,随着填料的增加,力学性能呈上升趋势,其中细菌纤维素质量含量为5%时,压缩模量可提高35%,经氧化处理的醛基细菌纤维素增强效果比未处理的细菌纤维素要稍强一些,模压成型方法较注塑成型方法可有效提高材料的压缩模量。复合材料呈脆性断裂,细菌纤维素的加入使复合材料的降解速率降低,而氧化后的醛基细菌纤维素/聚乳酸复合材料的降解速率与纯聚乳酸材料相近。Poly （lactic acid） /bacterial cellulose （PLA/BC） composite materials were prepared through blending modified method, and were processed by injection molding or molded molding. The mechanical properties, thermal properties, conformation and degradation rate of prepared samples were studied. The results showed that the BC could improve the strength of PLA,when the content of BC was below 5 % ,the compression modulus was higher as the content of BC grew. When the content of BC was 5 % , the compression modulus could reach 35 % higher than PLA,but the toughness of sample fell rapidly. 2,3-dialdehyde bacterial cellulose （DABC） was more effective in improving the strength of material. Compared with injection molding,molded molding could also improve the strength of the material obviously. The result of SEM observation showed the fracture behavior was brittle fracture. The addition of BC could reduce the rate of degradation,but the degradation rate of PLA/ BC composite material was quite similar with PLA.

关 键 词：聚乳酸 细菌纤维素 模压成型 增强 降解速率 

分 类 号：O636.11[理学—高分子化学]