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PTFE/PAN共混中空纤维膜的制备与性能

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    发表于 2013-4-14 18:12:34 | 显示全部楼层 |阅读模式
    PTFE/PAN共混中空纤维膜的制备与性能

    李亮[1,2] 肖长发[1,2] 黄庆林[1,2] 胡晓宇[1,2][1]天津工业大学材料科学与工程学院,天津300387 [2]天津工业大学中空纤维膜材料与膜过程国家重点实验室,天津300387

    摘 要:以聚丙烯腈(PAN)为成膜载体,由聚四氟乙烯(PTFE)分散乳液通过干湿法纺丝制得PTFE/PAN共混中空纤维膜。利用红外光谱(FT—IR)研究了烧结前后中空纤维膜的化学变化,热失重(TGA)分析了中空纤维膜的热稳定性,并采用场发射扫描电镜(FESEM)观察了不同烧结温度的中空纤维膜形貌。结果表明:在预氧化烧结过程中PAN发生了环化反应,生成耐热的梯形结构,提高了中空纤维膜的耐热性;随着烧结温度的升高,生成的点纤结构尺寸明显增加,中空纤维膜的力学强度显著提高。[著者文摘]

    关键词:聚丙烯腈 聚四氟乙烯 中空纤维膜 烧结 梯形结构
    分类号: TB324[著者标引]文献标识码:A文章编号:1001-4380(2013)01-0012-04栏目信息:工艺
    相关文献:主题相关

    Preparation and Properties of PTFE/PAN Blend Hollow Fiber MembraneAbstract: Poly(tetrafluoroethylene)(PTFE)/poly(acrylonitrile)(PAN) blend hollow fiber membranes were prepared from the blends of PTFE emulsion and PAN through dry-wet spinning method. The chemical constitutions of hollow fiber membranes before and after sintering were investigated with FT-IR. Meanwhile, TGA was utilized to analyse the thermal stability of hollow fiber membranes. The structure and morphology of hollow fiber membranes at different sintering temperatures were characterized by field emission scanning electronic microscopy (FESEM). Results show that cyclization reaction occurs during the pre oxidation and sintering process in PAN. Moreover, the trapezoidal structure improves the thermal resistance of hollow fiber membranes; the size of node-fibril structure increases obviously as the raising of sintering temperature, which leads to the enhancement of mem- brane mechanical strength.[著者文摘]

    Key words: PAN PTFE hollow fiber membrane sintering trapezoidal structure

    收稿日期: 2011-07-26修订日期: 2012-07-08基金资助:国家自然科学基金资助项目(51073120);天津市科技资助项目(10SYSYJC27900)
    作者简介:李亮(1986-),男,硕士研究生,从事高分子膜材料的研究应用,E—mail:liliangl986nuc@163.com 通讯作者:肖长发,男,教授,联系地址:天津市西青区宾水西道399号天津工业大学材料科学与工程学院(300387),E-mail:cfxiao@tjpu.edu.cn

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    PTFE/PAN共混中空纤维膜的制备与性能

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