EVOH纳米纤维及其功能膜的制备与性能研究  

Preparation and Characterization of EVOH Nanofiber and Nanofiber Membrane

作　　者：祝可颖 徐冠彪[1] 徐丹丹[1] 徐丝雨 肖茹[1] 

机构地区：[1]纤维材料改性国家重点实验室,东华大学材料学院与工程学院,上海201620

出　　处：《高分子通报》2013年第10期156-163,共8页Polymer Bulletin

基　　金：国家自然科学基金资助(No.20874010);高等学校学科创新引智计划资助(No.111-2-04,B07024)

摘　　要：利用熔融纺丝相分离行为制备乙烯-乙烯醇共聚树脂(EVOH)纳米纤维,并利用湿法成网的方法制备EVOH纳米纤维膜,分析表征了EVOH纳米纤维的形态、结构、结晶性能及纤维膜的形态、孔隙率、孔径大小和分布、比表面积等。结果表明:乙烯-乙烯醇共聚树脂/乙酸丁酸纤维素酯(EVOH/CAB)经双螺杆熔融挤出去除CAB后所制备的EVOH纳米纤维平均直径为162～260nm,加工条件和方法对EVOH的结构和结晶性能没有明显影响。随着纤维膜厚度增加,EVOH纳米纤维膜的孔径减小、孔径分布变窄;随着纳米纤维制备过程中EVOH/CAB体系中EVOH含量增大,EVOH纳米纤维直径增大,其功能膜的孔隙率增大、比表面积减小。In this paper, Polyethylene-co-polyvinyl（EVOH） nanofibers were successfully prepared by melt extrusion of immiscible blends. Then the EVOH nanofiber membranes were prepared by wet-laid process. The morphology, crystallization properties of EVOH nanofibers and morphology, porosity, pore size and pore size distribution of EVOH nanofiber membranes were analyzed. The results showed that the average diameter of EVOH nanofibers were around 162-- 260nm, the processing conditions and method had no significant effect on the structure and crystallization properes of EVOH nanofiber. The pore size and pore size distribution of EVOH nanofiber membranes increased and narrowed with the increasing of thickness of nanofiber membrane respectively. As the increased of EVOH of EVOH/CAB system during the preparation of nanofibers, diameter of nanofibers and porosity of nanofiher membranes increased, however, the specific surface area of nanofiber membrane decreased.

关 键 词：乙烯一乙烯醇共聚树脂(EVOH) 纳米纤维 纳米纤维膜 孔径分布 比表面积 

分 类 号：TB383.1[一般工业技术—材料科学与工程]