木粉的微生物法表面改性研究  

Study on Surface Modification of Wood Fibers with Microorganism

作　　者：尹晓琛[1] 林群芳[1] 陈袁曦[2] 周晓东[2] 

机构地区：[1]华东理工大学材料学院,上海200237 [2]华东理工大学化学工程联合国家重点实验室,上海200237

出　　处：《工程塑料应用》2012年第5期13-16,共4页Engineering Plastics Application

摘　　要：通过培养木醋杆菌,使其所产细菌纤维素"生长"于木质纤维表面和表面的缝隙处,从而实现对木粉的表面改性。采用挤出混炼的方法制备了聚乳酸/木粉复合材料。结果表明,木粉经细菌纤维素改性后,木质纤维与树脂的界面结合情况明显改观,聚乳酸/木粉复合材料的力学性能得到改善。与未处理时相比,材料的拉伸强度、弯曲强度、冲击强度分别增加了27.05%,24.11%,39.13%。Wood fiber（WF） was modified by attaching bacterial cellulose to the laber surlace or tlae gaps ot mlcro-ntbers using a strain of cellulose-producing bacteria. Polylactic acid（PLA）/WF were prepared by extrusion and injection molding process.The results showed that the influence of bacterial cellulose attached to wood fibers was significant on interface bonding between fibers and matrix. The mechanical properties of PLA/WF composite was improved, the tensile strength, flexural strength and impact strength increased by 27.05%, 24.11%, 39.13% respectively.

关 键 词：表面改性 界面 聚乳酸 细菌纤维素 木粉 

分 类 号：TB332[一般工业技术—材料科学与工程]