动态紫外光界面聚合技术制备玻纤/PVDF中空纤维复合膜
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摘要
通过动态紫外光接枝界面聚合技术和湿法共挤出纺丝工艺制备了玻纤增强PVDF中空纤维复合膜,并将其与商业化的PVDF内支撑膜进行了对比分析.当单体质量分数为1%和2%时,玻纤与PVDF基材之间的剥离强度相比于未经接枝的原PVDF复合膜分别提高了37.27%和168.51%;当单体质量分数为2%时,玻纤与PVDF膜材之间的结合强度达到了186.85 N/m,比商业PVDF膜(146.23 N/m)高出27.78%.在处理量为100 L/d稳定运行的A~2/O-MBR中为期30 d的对比实验发现,动态接枝膜具有良好的运行稳定性和抗污染性能,其运行通量性能与商业膜基本相同.
Dynamic UV photografting and wet co-extrusion spinning techniques were successfully utilized toprepare a novel glass-fabric reinforced polyvinylidene fluoride(PVDF) hollow fiber membrane. Reaction solution containing 1% and 2% acrylamide monomer(AM) was used to preform dynamic UV photografting and experimental results showed 37.27% and 168.51% increase of peeling strength respectively comparing to pre-photografted PVDF fiber. The peeling strength of glass fiber reinforced membrane(with 2% monomer solution) achieved 186.85 N/m which is 27.78% higher than commercially available PVDF membrane. The dynamic grafting process was found to slightly reduce self-polymerization comparing to static UV photografting but substantially improves the interfacial polymerization which makes the glass fiber and PVDF base matrix binds more firmly. Filtration performance of glass-fibric reinforced PVDF hollow fiber membrane was also tested with a pilot A~2/O membrane bioreactor system(A~2/O-MBR) and the results were compared with that of the commercial PVDF membrance. Pilot A~2/O-MBR system was operated with a processing capacity of 100 L/d [20 L/(m~2·h) for individual membrane] over 30 days period of time. It was found that glass-fibric reinforced PVDF membrane exhibited stability and antifouling properties that are equal or better than the commercial PVDF membrane.
Dynamic UV photografting and wet co-extrusion spinning techniques were successfully utilized toprepare a novel glass-fabric reinforced polyvinylidene fluoride(PVDF) hollow fiber membrane. Reaction solution containing 1% and 2% acrylamide monomer(AM) was used to preform dynamic UV photografting and experimental results showed 37.27% and 168.51% increase of peeling strength respectively comparing to pre-photografted PVDF fiber. The peeling strength of glass fiber reinforced membrane(with 2% monomer solution) achieved 186.85 N/m which is 27.78% higher than commercially available PVDF membrane. The dynamic grafting process was found to slightly reduce self-polymerization comparing to static UV photografting but substantially improves the interfacial polymerization which makes the glass fiber and PVDF base matrix binds more firmly. Filtration performance of glass-fibric reinforced PVDF hollow fiber membrane was also tested with a pilot A~2/O membrane bioreactor system(A~2/O-MBR) and the results were compared with that of the commercial PVDF membrance. Pilot A~2/O-MBR system was operated with a processing capacity of 100 L/d [20 L/(m~2·h) for individual membrane] over 30 days period of time. It was found that glass-fibric reinforced PVDF membrane exhibited stability and antifouling properties that are equal or better than the commercial PVDF membrane.
引文
[1] 李锁定,陈亦力,文剑平.纤维增强型中空纤维膜的研究开发[A].第四届中国膜科学与技术报告会[C].北京:中国膜工业协会,北京工业大学,2013.
[2] 李凭力,刘杰,李英栋,等.纤维增强型PVDF中空纤维膜的研制[A].第四届中国膜科学与技术报告会[C].北京:中国膜工业协会,北京工业大学,2013.
[3] 刘海亮,肖长发,黄庆林,等.增强型中空纤维多孔膜研究进展[J].纺织学报,2015,36(9):154-161.
[4] 宣孟阳,杜启云,任连娟.增强型中空纤维膜的研发与应用[J].安徽科技,2006,(10):45-46.
[5] 赵晨,吕晓龙,武春瑞,等.复合增强聚偏氟乙烯中空纤维膜的制备研究[J].膜科学与技术,2014,34(6):11-16.
[6] Hayano F,Hashino Y,Ichikawa K.Semipermeable composite membrane of fibre-reinforced foam|has reticulated zone contg:DE2658408-A;JP52081076-A;JP52082682-A;FR2336962-A;US4061821-A;DE2658408-B;IT1067339-B [P/OL].1985-08-05[1995-5-31].https://patents.google.com/patent/EP0211633B2.
[7] Mailvaganam M,Fabbricino L,Rodrigues C F F,et al.Hollow fiber semi-permeable membrane of tubular braid:US542607[P/OL].1993-12-20[1995-12-05].https://patents.google.com/patent/US5472607A.
[8] Liu J,Li P,Li Y,et al.Preparation of PET threads reinforced PVDF hollow fiber membrane[J].Desalination,2009,249(2):453-457.
[9] Yuan D,Fan Y,Yu Y,et al.Study of a membrane bioreactor with glass fiber flat grille modules and the modules′ optimization based on the local critical flux theory[J].Water Res,2010,44(3):997-1005.
[10] Cui H,Kessler M R.Glass fiber reinforced ROMP-based bio-renewable polymers:Enhancement of the interface with silane coupling agents [J].Composite Sci Technol,2012,72(11):1264-1272.
[11] Hamada H,Ikuta N,Nishida N,et al.Effect of interfacial silane network structure on interfacial strength in glass fibre composites[J].Composites,1994,25(7):512-515.
[12] Yoo Y,Spencer M W,Paul D R.Morphology and mechanical properties of glass fiber reinforced Nylon 6 nanocomposites[J].Polymer,2011,52(1):180-190.
[13] Zhang L,Wu D,Chen Y,et al.Surface modification of polymethyl methacrylate intraocular lenses by plasma for improvement of antithrombogenicity and transmittance[J].Appl Surf Sci,2009,255(15):6840-6845.
[14] Zhang W,He G,Gao P,et al.Development and characterization of composite nanofiltration membranes and their application in concentration of antibiotics[J].Sep Purif Technol,2003,30(1):27-35.
[15] Ng L Y,Mohammad A W,Leo C P,et al.Polymeric membranes incorporated with metal/metal oxide nanoparticles:A comprehensive review[J].Desalination,2013,308:15-33.
[16] Zhong P S,Widjojo N,Chung T S,et al.Positively charged nanofiltration (NF) membranes via UV grafting on sulfonated polyphenylenesulfone (sPPSU) for effective removal of textile dyes from wastewater[J].J Membr Sci,2012,417/418:52-60.
[17] Deng H,Xu Y,Chen Q,et al.High flux positively charged nanofiltration membranes prepared by UV-initiated graft polymerization of methacrylatoethyl trimethyl ammonium chloride (DMC) onto polysulfone membranes[J].J Membr Sci,2011,366(1/2):363-372.
[18] Yu H Y,Tang Z Q,Huang L,et al.Surface modification of polypropylene macroporous membrane to improve its antifouling characteristics in a submerged membrane-bioreactor:H2O plasma treatment[J].Water Res,2008,42(16):4341-4347.
[19] Luo N,Xu R,Yang M,et al.Preparation and characterization of PVDF-glass fiber composite membrane reinforced by interfacial UV-grafting copolymerization[J].J Environ Sci (China),2015,38:24-35.
[20] Luo N,Zhong H,Yang M,et al.Modifying glass fiber surface with grafting acrylamide by UV-grafting copolymerization for preparation of glass fiber reinforced PVDF composite membrane[J].J Environ Sci (China),2016,39:208-217.
[2] 李凭力,刘杰,李英栋,等.纤维增强型PVDF中空纤维膜的研制[A].第四届中国膜科学与技术报告会[C].北京:中国膜工业协会,北京工业大学,2013.
[3] 刘海亮,肖长发,黄庆林,等.增强型中空纤维多孔膜研究进展[J].纺织学报,2015,36(9):154-161.
[4] 宣孟阳,杜启云,任连娟.增强型中空纤维膜的研发与应用[J].安徽科技,2006,(10):45-46.
[5] 赵晨,吕晓龙,武春瑞,等.复合增强聚偏氟乙烯中空纤维膜的制备研究[J].膜科学与技术,2014,34(6):11-16.
[6] Hayano F,Hashino Y,Ichikawa K.Semipermeable composite membrane of fibre-reinforced foam|has reticulated zone contg:DE2658408-A;JP52081076-A;JP52082682-A;FR2336962-A;US4061821-A;DE2658408-B;IT1067339-B [P/OL].1985-08-05[1995-5-31].https://patents.google.com/patent/EP0211633B2.
[7] Mailvaganam M,Fabbricino L,Rodrigues C F F,et al.Hollow fiber semi-permeable membrane of tubular braid:US542607[P/OL].1993-12-20[1995-12-05].https://patents.google.com/patent/US5472607A.
[8] Liu J,Li P,Li Y,et al.Preparation of PET threads reinforced PVDF hollow fiber membrane[J].Desalination,2009,249(2):453-457.
[9] Yuan D,Fan Y,Yu Y,et al.Study of a membrane bioreactor with glass fiber flat grille modules and the modules′ optimization based on the local critical flux theory[J].Water Res,2010,44(3):997-1005.
[10] Cui H,Kessler M R.Glass fiber reinforced ROMP-based bio-renewable polymers:Enhancement of the interface with silane coupling agents [J].Composite Sci Technol,2012,72(11):1264-1272.
[11] Hamada H,Ikuta N,Nishida N,et al.Effect of interfacial silane network structure on interfacial strength in glass fibre composites[J].Composites,1994,25(7):512-515.
[12] Yoo Y,Spencer M W,Paul D R.Morphology and mechanical properties of glass fiber reinforced Nylon 6 nanocomposites[J].Polymer,2011,52(1):180-190.
[13] Zhang L,Wu D,Chen Y,et al.Surface modification of polymethyl methacrylate intraocular lenses by plasma for improvement of antithrombogenicity and transmittance[J].Appl Surf Sci,2009,255(15):6840-6845.
[14] Zhang W,He G,Gao P,et al.Development and characterization of composite nanofiltration membranes and their application in concentration of antibiotics[J].Sep Purif Technol,2003,30(1):27-35.
[15] Ng L Y,Mohammad A W,Leo C P,et al.Polymeric membranes incorporated with metal/metal oxide nanoparticles:A comprehensive review[J].Desalination,2013,308:15-33.
[16] Zhong P S,Widjojo N,Chung T S,et al.Positively charged nanofiltration (NF) membranes via UV grafting on sulfonated polyphenylenesulfone (sPPSU) for effective removal of textile dyes from wastewater[J].J Membr Sci,2012,417/418:52-60.
[17] Deng H,Xu Y,Chen Q,et al.High flux positively charged nanofiltration membranes prepared by UV-initiated graft polymerization of methacrylatoethyl trimethyl ammonium chloride (DMC) onto polysulfone membranes[J].J Membr Sci,2011,366(1/2):363-372.
[18] Yu H Y,Tang Z Q,Huang L,et al.Surface modification of polypropylene macroporous membrane to improve its antifouling characteristics in a submerged membrane-bioreactor:H2O plasma treatment[J].Water Res,2008,42(16):4341-4347.
[19] Luo N,Xu R,Yang M,et al.Preparation and characterization of PVDF-glass fiber composite membrane reinforced by interfacial UV-grafting copolymerization[J].J Environ Sci (China),2015,38:24-35.
[20] Luo N,Zhong H,Yang M,et al.Modifying glass fiber surface with grafting acrylamide by UV-grafting copolymerization for preparation of glass fiber reinforced PVDF composite membrane[J].J Environ Sci (China),2016,39:208-217.