静电纺树枝状聚偏氟乙烯纳米纤维膜的制备  

Preparation of Electrospun Tree-Like Polyvinylidene Fluoride Nanofiber Membrane

作　　者：厉宗洁 王鑫慧 王浩[1] 贾梦格 王树业 赵良 刘雍[1] 康卫民[1] Zongjie Li;Xinhui Wang;Hao Wang;Mengge Jia;Shuye Wang;Liang Zhao;Yong Liu;Weimin Kang(State Key Laboratory of Separation Membranes and Membrane Processes/School of Textile Science and Engineering,Tiangong University,Tianjin 300387,China)

机构地区：[1]天津工业大学分离膜与膜过程国家重点实验室/纺织科学与工程学院,天津300387

出　　处：《高分子材料科学与工程》2023年第6期71-77,共7页Polymer Materials Science & Engineering

基　　金：国家自然科学基金资助项目(52203067,51873152)。

摘　　要：通过向聚偏氟乙烯(PVDF)纺丝液中添加有机支化盐四丁基六氟磷酸铵(TBAHP),采用一步静电纺丝法制备了PVDF树枝状纳米纤维膜。探讨了TBAHP添加量、静电纺丝工艺参数及溶剂体积比对纤维树枝状形貌的影响,同时研究了TBAHP添加量对纤维膜力学性能、孔径和孔隙率的影响。结果表明,TBAHP摩尔浓度为0.05 mol/L、N,N-二甲基甲酰胺(DMF)与丙酮(ACE)体积比为7:3、电压为27 kV、接收距离为12 cm时,制备的纳米纤维膜分支纤维较多,呈现形貌良好的树枝状结构,其断裂强度达4.93 MPa,远大于纯PVDF纳米纤维膜的1.82 MPa,孔径仅0.2μm,孔隙率达90%,在过滤、油水分离、电化学及膜蒸馏等领域具有很好的应用前景。By adding tetrabutylammonium hexafluorophosphate(TBAHP),an organic branching salt,to polyvinylidene fluoride(PVDF)spinning solution,PVDF tree-like nanofiber membranes were prepared by one-step electrospinning method.The effects of TBAHP addition,electrospinning process parameters and solvent volume ratio on the dendrite morphology of fibers were investigated.In addition,the effects of the amount of TBAHP on the mechanical properties,pore size and porosity of the fiber membranes were studied.The results show that when the concentration of TBAHP is 0.05 mol/L,the volume ratio of N,N-dimethylformamide and acetone is 7:3,the voltage is 27 kV,and the receiving distance is 12 cm,the prepared nanofiber membrane has more branched fibers,showing obvious tree-like structure.The fracture stress of fiber membrane with obvious tree-like structure is 4.93 MPa which is much higher than 1.82 MPa of the pure PVDF nanofiber membrane,its pore size is only 2μm,and the porosity is 90%.The PVDF tree-like nanofiber membrane has broad applications in filtration,oil-water separation,membrane distillation and electrochemistry.

关 键 词：静电纺丝 四丁基六氟磷酸铵 聚偏氟乙烯 树枝状纳米纤维 

分 类 号：TQ340.64[化学工程—化纤工业]