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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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聚全氟乙丙烯中空纤维膜研究
DOI: 10.3724/SP.J.1105.2012.12082, PP. 1423-1428
Keywords: 聚全氟乙丙烯,熔体纺丝,中空纤维膜,性能
Abstract:
以聚全氟乙丙烯(FEP)为成膜聚合物,复合无机粒子为成孔剂,邻苯二甲酸二辛酯(DOP)为稀释剂,采用熔融纺丝工艺制备得到FEP中空纤维膜.分析和讨论了不同成膜体系对FEP中空纤维膜热性能、动态力学性能和力学性能的影响,并对膜的纯水通量和孔径分布进行表征.用扫描电子显微镜(SEM)观察了膜的横断面和表面形貌.结果表明,所得FEP中空纤维膜为由溶出微孔和界面微孔组成的海绵状孔结构.随着成孔剂含量的增加,成孔剂在成膜体系中分散程度变差,容易发生团聚,最终导致膜孔径变大,孔径分布变宽.成孔剂和稀释剂对FEP中空纤维膜的热性能和动态力学性能影响较小.当FEP含量增加到70wt%时,膜表面容易形成一层致密层,降低了膜的通透性.
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