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.
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