溶液喷射聚间苯二甲酰间苯二胺纳米纤维膜的过滤性能
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摘要
以质量分数为12%的聚间苯二甲酰间苯二胺(PMIA)溶液为纺丝液,采用溶液喷射纺丝技术制备了直径范围为146~532nm的PMIA纳米纤维膜,探讨了面密度对纤维膜孔径结构、透气性、水通量及过滤效率的影响.结果表明,随着面密度的增加,纤维膜的平均孔径、透气量和水通量逐渐降低,过滤效率明显增加,当面密度为22.8g/m2时,纤维膜对2.5μm聚苯乙烯(PS)微球的过滤效率高达99%以上.过滤机理研究结果表明,PS微球很大程度上被拦截在纤维膜表层,膜污染程度较小.
Poly(m-phenylene isophthalamide)(PMIA)nanofibers membrane was prepared via solution blow spinning from the solution of 12% PMIA.The nanofiber diameter was in the range of 146-532 nm.The pore structure,gas permeability,water flux and filtration efficiency of PMIA nanofibers membrane were evaluated.The results indicated the pore size,gas permeability and water flux all decreased with the areal density of the nanofibers membrane increasing,while the filtration efficiency of the membrane against 2.5μm polystyrene(PS)particles was improved.The filtration efficiency was above 99% when the areal density of the membrane was 22.8 g/m2.The research on the filtration mechanism showed that the pollution level of PMIA nanofibers membrane was very low because 2.5 μm PS particles were captured mostly on the surface layer of PMIA nanofibers membrane.
Poly(m-phenylene isophthalamide)(PMIA)nanofibers membrane was prepared via solution blow spinning from the solution of 12% PMIA.The nanofiber diameter was in the range of 146-532 nm.The pore structure,gas permeability,water flux and filtration efficiency of PMIA nanofibers membrane were evaluated.The results indicated the pore size,gas permeability and water flux all decreased with the areal density of the nanofibers membrane increasing,while the filtration efficiency of the membrane against 2.5μm polystyrene(PS)particles was improved.The filtration efficiency was above 99% when the areal density of the membrane was 22.8 g/m2.The research on the filtration mechanism showed that the pollution level of PMIA nanofibers membrane was very low because 2.5 μm PS particles were captured mostly on the surface layer of PMIA nanofibers membrane.
引文
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[3]BARHATE R S,RAMAKRISHNA S.Nanofibrous filtering media:Filtration problems and solutions from tiny materials[J].Journal of Membrane Science,2007,296(1/2):1-8.
[4]MOKHENA T C,JACOBS V,LUYT A S.A review on electrospun bio-based polymers for water treatment[J].Express Polymer Letters,2015,9(10):839-880.
[5]MEDEIROS E S,GLENN G M,KLAMCZYNSKI A P,et al.Solution blow spinning:A new method to produce micro and nanofibers from polymer solutions[J].Journal of Applied Polymer Science,2009,113(4):2322-2330.
[6]LIU R F,XU X L,ZHUANG X P,et al.Solution blowing of chitosan/PVA hydrogel nanofiber mats[J].Carbohydrate Polymers,2014,101:1116-1121.
[7]ZHOU F,GONG R,PORAT I.Mass production of nanofibre assemblies by electrostatic spinning[J].Polymer International,2009,58(4):331-342.
[8]BOLBASOV E N,ANISSIMOV Y G,PUSTOVOYTOV A V,et al.Ferroelectric polymer scaffolds based on a copolymer of tetrafluoroethylene with vinylidene fluoride:Fabrication and properties[J].Materials Science and Engineering C,2014,10:32-41.
[9]TAO X X,ZHOU G Q,ZHUANG X P,et al.Solution blowing of activated carbon nanofibers for phenol adsorption[J].RSC Advances,2015,5(8):5801-5808.
[10]何斌.静电纺CNTs/PMIA纳米纤维增强复合材料的制备及其结构性能的研究[D].苏州:苏州大学纺织与服装工程学院,2012.
[11]CHEN K,ZHANG S C,LIU B W,et al.Large-scale fabrication of highly aligned poly(m-phenylene isophthalamide)nanofibers with robust mechanical strength[J].RSC Adv,2014,4(86):45760-45767.
[12]李超,于俊荣,王彦,等.溶液喷射法制备间位芳纶纳米纤维的研究[J].功能材料,2016,47(10):10218-10224.
[13]邱芯薇.静电纺再生丝素纤维制品的结构与性能[D].苏州:苏州大学纺织与服装工程学院,2006.
[14]陈坤.静电纺间位芳纶纳米纤维的可控制备及其应用研究[D].上海:东华大学纺织学院,2015.
[15]YU J,KIM Y,KIM D Y,et al.Super high flux microfiltration based on electrospun nanofibrous m-aramid membranes for water treatment[J].Macromolecular Research,2015,23(7):601-606.
[16]ZHAO Z G,ZHENG J F,PENG B,et al.A novel composite microfiltration membrane:Structure and performance[J].Journal of Membrane Science,2013,439:12-19.
[17]AUSSAWASATHIEN D,TEERAWATTANANON C,VONGACHARIYA A.Separation of micron to sub-micron particles from water:Electrospun nylon-6 nanofibrous membranes as pre-filters[J].Journal of Membrane Science,2008,315(1/2):11-19.