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无机材料学报

无机材料学报

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以聚偏氟乙烯中空纤维微滤膜为模板制备磁性ZSM-5/Ni中空纤维

蒋金龙1,2, 陶惠箐1, 曾昌凤3, 张利雄1, 徐南平1   

  1. (1. 南京工业大学化学化工学院, 材料化学工程国家重点实验室, 南京 210009; 2. 淮阴工学院化学工程系, 淮安 223001; 3. 南京工业大学机械与动力工程学院, 南京 210009)
  • 收稿日期:2007-05-18 修回日期:2007-07-01 出版日期:2008-05-20 网络出版日期:2008-05-20

Preparation of Magnetic ZSM-5/Ni Hollow Fibers Using Poly (vinylidene fluoride) Hollow Fiber Microfiltration Membranes as Templates

JIANG Jin-Long1,2, TAO Hui-Qing1, ZENG Chang-Feng3, ZHANG Li-Xiong1, XU Nan-Ping1   

  1. (1. College of Chemistry and Chemical Engineering, State Key Laboratory of Materials-oriental Chemical Engineering, Nanjing University of Technology, Nanjing 210009, China; 2. Department of Chemical Engineering, Huaiyin College of Technology, Huaian 223001, China; 3. School of Mechanical and Power Engineering, Nanjing University of Technology, Nanjing 210009, China)
  • Received:2007-05-18 Revised:2007-07-01 Published:2008-05-20 Online:2008-05-20

PDF (PC)

2386

被引次数

21

摘要： 以聚偏氟乙烯(PVDF)中空纤维微滤膜为模板, 通过化学镀制备Ni/PVDF纤维, 再经原位水热合成得到ZSM-5/Ni/PVDF纤维, 最后经高温焙烧制得ZSM-5/Ni中空纤维. 用SEM、EDX、XRD、BET、VSM和TG等对样品进行了表征. 考察了水热处理次数和温度对ZSM-5沸石在Ni-P镀层上负载的影响, 结果表明: 化学镀能制得Ni/PVDF纤维, 其磁性可控. 在150℃下两次水热处理Ni/PVDF纤维24h可在镀层上得到致密连续的沸石层, 控制水热处理温度可以控制镀层表面沸石层的厚度. 在550℃的空气气氛中焙烧ZSM-5/Ni/PVDF纤维可以得到完整的ZSM-5/Ni中空纤维, 150℃下两次水热处理24h得到的ZSM-5/Ni纤维, 焙烧后其饱和磁化强度由9.3A·m2/kg提高到20.3A·m2/kg, 其比表面积为108m2/g.

关键词: 磁性沸石, 中空纤维, 聚偏氟乙烯微滤膜, 化学镀

Abstract: Magnetic ZSM-5/Ni hollow fibers were synthesized by first growing ZSM-5 layers on Ni/PVDF hollow fibers, which were prepared by electroless plating on poly(vinylidene fluoride) (PVDF) hollow fiber microfiltration membranes, followed by calcination in air at 550℃ for 4h. The samples were characterized by SEM, EDX, XRD, BET, vibrating sample magnetometer (VSM) and TG. The effects of hydrothermal synthesis cycles and temperature on the coating of ZSM-5 crystals on the surfaces of the Ni/PVDF hollow fibers were examined. The results indicate that the thickness of the nickel layer can be regulated by controlling the plating time. A continuous ZSM-5 film can be obtained by hydrothermal treatment twice at 150℃ for 24h. The thickness of the zeolite film can be regulated by controlling the reaction temperature. The saturation magnetization values of the magnetic ZSM-5/Ni hollow fibers prepared after hydrothermal treatment twice at 150℃ for 24h are 9.3A·m2/kg and 20.3A·m2/kg before and after calcination, respectively. The BET specific surface area of the calcined sample is 108m2/g.

Key words: magnetic zeolite, hollow fiber, PVDF fiber, electroless plating

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