激光熔体静电纺丝法制备PLA/EVOH复合纤维  

Preparation of Polylactic acid/Poly(ethylene-co-vinyl alcohol) by Laser Melt-Electrospinning

作　　者：王哲[1] 李秀艳[1] 王娇娜[1,2] 李从举[1,2] 

机构地区：[1]北京服装学院材料科学与工程学院,北京100029 [2]北京服装学院北京市服装材料研究开发与评价重点实验室,北京100029

出　　处：《材料导报》2013年第10期90-94,共5页Materials Reports

基　　金：国家自然科学基金(51073005;21274006);北京市自然科学基金(2112013);北京市教委科技发展计划重点项目(KZ201010012012;KZ201210012013);北京市属高等学校人才强教深化计划(IHLB);国家973项目(2010CB933501);北京市科技计划项目(课题)(Z111103066611004);纺织之光青年基金;北京服装学院一般科研项目(2012A-09)

摘　　要：制备了皮芯结构的PLA/EVOH复合纤维棒,采用激光熔体静电纺丝法将纤维棒制成微纳米纤维毡,研究了EVOH涂覆对电纺纤维直径和形貌的影响。利用扫描电子显微镜(SEM)、傅里叶红外光谱(FT-IR)及水接触角测试(WCA)对纤维形貌、分子结构和亲水性进行了表征。SEM结果表明:EVOH涂覆后,PLA纤维直径可从约7μm显著减小到约1μm;因两种聚合物性质的差异性,EVOH剥离后PLA纤维呈槽状结构,该结果被FT-IR证实。WCA结果表明EVOH涂覆后PLA的疏水性更明显。Rodlike PLA/EVOH composite fibers with skin core structure were made. Micro/nano fibers were produced from these rod-like fibers using a laser melt-electrospinning system, and the effects of EVOH component on fibers diameter and morphology were described. The micromorphology of the fibers was studied by scanning electron microscope （SEM）. The molecular orientation was characterized by Fourier transform infrared spectroscopy （FT-IR）. The hydrophilicity of the nano-scale fiber mats was analyzed by water contact angle （WCA）. With the SEM results, it was proved that PLA coated with EVOH has a significant effect on decreasing fiber diameter from 7 ~m to 1 t^m or so. The property of EVOH melts is differernt with that of PLA melts, and the situation of electrospinning is much more complicated. For this reason, the fibers obtained a trough structure after the removal of EVOH. The trough structure of PLA was proved by FT-IR test. The PLA proves to be more hydrophilicity than the PLA/EVOH.

关 键 词：聚乳酸 乙烯-乙烯醇共聚物 激光熔体静电纺丝 微纳米纤维 

分 类 号：TQ342.93[化学工程—化纤工业]