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  

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

作　　者：蒋金龙[1] 陶惠箐[1] 曾昌凤[2] 张利雄[1] 徐南平[1] 

机构地区：[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 [2]南京工业大学机械与动力工程学院,南京210009

出　　处：《无机材料学报》2008年第3期475-480,共6页Journal of Inorganic Materials

基　　金：国家自然科学基金(20676059)

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·m^2/kg提高到20.3A·m^2/kg,其比表面积为108m^2/g.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·m^2/kg and 20.3A·m^2/kg before and after calcination, respectively. The BET specific surface area of the calcined sample is 108m^2/g.

关 键 词：磁性沸石 中空纤维 聚偏氟乙烯微滤膜 化学镀 

分 类 号：TB43[一般工业技术] TQ153[化学工程—电化学工业]