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OALib Journal期刊
ISSN: 2333-9721
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静电纺丝法制备聚醚酰亚胺纤维膜的结构和介电性能研究
DOI: 10.3724/SP.J.1105.2012.12075, PP. 1409-1416
Keywords: 静电纺丝,聚醚酰亚胺,介电性能,微观结构
Abstract:
采用静电纺丝法制备了聚醚酰亚胺(PEI)纤维膜,通过扫描电子显微镜(SEM)和偏振红外对PEI纤维膜的微观结构进行研究.实验结果显示纺丝液溶剂决定了PEI的可纺性,以N-甲基吡咯烷酮(NMP)为溶剂时,空气湿度显著地影响纺丝过程以及纤维的形态.在相同纺丝工艺条件下,随着纺丝液浓度的增加,所得PEI取向纤维沿辊筒收集方向的排列规整性提高,纤维平均直径由405nm增加到3.25μm.PEI纤维膜介电性能的研究表明,取向纤维膜的介电常数很小,最低可达到1.1,其介电损耗也维持在较低的水平,纤维膜的接收方式以及热牵伸处理会对PEI纤维膜的介电性能产生影响.
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