PVDF膜的亲水改性及其抗污染性能的研究新进展
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摘要
PVDF膜由于其较强的疏水性能,在水处理应用中需要较强的驱动力,使得运行费用增加;同时膜的疏水性也会导致膜污染、膜堵塞,从而造成膜水通量的降低。因此,针对此问题,提出了PVDF膜的改性,通过对PVDF膜进行改性来提高它的亲水性能从而改善膜的性能。介绍了近年来PVDF膜亲水改性的研究新进展,PVDF膜的改性主要有表面改性和共混改性,表面改性主要有表面接枝与表面涂覆,共混改性主要的共混物质有亲水聚合物、无机纳米粒子以及碳基纳米材料等。研究发现,通过改性后的PVDF膜亲水性能、抗污染性能以及膜的机械性能都有所提高。这为解决PVDF膜的污染问题提供了一种实际可行的方法,并通过提高其亲水性而降低了运行成本。
Attributed to the strong hydrophobic properties of PVDF,it requires a strong driving force in water treatment applications,resulting in increased operating costs. At the same time,membrane hydrophobicity also causes membrane fouling and membrane clogging making a dramatic decrease in membrane water flux. Therefore,in order to solve the issues,the paper presents the modification of PVDF membrane so as to improve the performance of the membrane. The research progress of hydrophilic modification of PVDF membrane in recent years is introduced. The modification of PVDF membrane mainly includes surface modification mainly divided into surface grafting and surface coating,and blend modification,the blend materials are hydrophilic polymers,inorganic nanoparticles and amphiphilic polymers etc. It found that anti-pollution performance and membrane mechanical properties of PVDF membrane have increased after modification,which provides a practical solution to the problem of contamination of PVDF membranes and reduces operating costs by increasing their hydrophilicity.
Attributed to the strong hydrophobic properties of PVDF,it requires a strong driving force in water treatment applications,resulting in increased operating costs. At the same time,membrane hydrophobicity also causes membrane fouling and membrane clogging making a dramatic decrease in membrane water flux. Therefore,in order to solve the issues,the paper presents the modification of PVDF membrane so as to improve the performance of the membrane. The research progress of hydrophilic modification of PVDF membrane in recent years is introduced. The modification of PVDF membrane mainly includes surface modification mainly divided into surface grafting and surface coating,and blend modification,the blend materials are hydrophilic polymers,inorganic nanoparticles and amphiphilic polymers etc. It found that anti-pollution performance and membrane mechanical properties of PVDF membrane have increased after modification,which provides a practical solution to the problem of contamination of PVDF membranes and reduces operating costs by increasing their hydrophilicity.
引文
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[24] Razzaghi M H,Safekordi A,Tavakolmoghadam M,et al.Morphological and separation performance study of PVDF/CA blend membranes[J]. Journal of Membrane Science,2014,470:547-557.
[25]宋春亮,曹义鸣,介兴明,等. PSf对提高PVDF/PSf/Ti O2共混膜抗污染性的作用[J].膜科学与技术,2010,30(4):14-18.
[2] Zhu L,Chen M,Dong Y,et al. A low-cost mullite-titania composite ceramic hollow fiber microfiltration membrane for highly efficient separation of oil-in-water emulsion[J]. Water Research,2016,90:277-285.
[3] Bae T H,Tak T M. Effect of Ti O2nanoparticles on fouling mitigation of ultrafiltration membranes for activated sludge filtration[J]. Journal of Membrane Science,2005,249(1/2):1-8.
[4] Lu Y,Yu S L,Chai B X. Preparation of poly(vinylidene fluoride)(PVDF)ultrafiltration membrane modified by nano-sized alumina(Al2O3)and its antifouling research[J]. Polymer,2005,46(18):7701-7706.
[5] Cheng X Q,Shan L,Lau C H. High flux polyethylene glycol based nanofiltration membranes for water environmental remediation[J]. Journal of Membrane Science,2015,476:95-104.
[6] Harisha R S,Hosamani K M,Keri R S,et al. Arsenic removal from drinking water using thin film composite nanofiltration membrane[J]. Desalination,2010,252(1/2/3):75-80.
[7] Cadott J E,Petersen R J,Larson R E,et al. A new thinfilm composite seawater reverse osmosis membrane[J].Desalination,1980,32(1/2/3):25-31.
[8] Konagaya S,Kuzumoto H,Watanabe O. New reverse osmosis membrane materials with higher resistance to chlorine[J]. Journal of Applied Polymer Science,2015,75(11):1357-1364.
[9]白静娜,赵金龙,吕宾,等.用于膜蒸馏的PVDF/PDMS疏水复合膜的研究及性能优化[J].膜科学与技术,2016,36(4):30-37.
[10] Wang S,Fang L I,Yong L I,et al. Hydrophillicsurface modification of PVDF membrane by poly(L-DOPA)coating and MPEG-NH2grafting[J]. Membrane Science&Technology,2015,35(1):42-48
[11] Yu W,Brown M,Graham N J. Prevention of PVDF ultrafiltration membrane fouling by coating MnO2nanoparticles with ozonation[J]. Scientific Reports,2016(6):30144.
[12] Zhao G,Chen W N. Enhanced PVDF membrane performance via surface modification by functional polymer poly(N-isopropylacrylamide)to control protein adsorption and bacterial adhesion[J]. Reactive&Functional Polymers,2015,97:19-29.
[13] Pan Y,Yu Z,Shi H,et al. A novel antifouling and antibacterial surface-functionalized PVDF ultrafiltration membrane via binding Ag/Si O2nanocom posites[J]. Journal of Chemical Technology&Biotechnology,2016,92(3):562-572.
[14]李妍,周晓吉,沈舒苏,等.一种两亲性共聚物的合成及其对PVDF膜的改性研究[J].膜科学与技术,2016,36(6):70-77.
[15] Chen F,Shi X,Chen X,et al. Preparation and characterization of amphiphilic copolymer PVDF-g-PMABS and its application in improving hydrophilicity and protein fouling resistance of PVDF membrane[J]. Applied Surface Science,2018,427(1):787-797.
[16] Qin A W,Li X,Ma B M,et al. Preparation and characterization of poly(vinylidene)fluoride membranes reinforced by modified nano-SiO2particles[J]. Materials Science Forum,2014,789(1):201-204.
[17] Jia L M,Wen C,Xu J Y,et al. Enhancement of retention and antifouling capability for PVDF UF membrane modified by nano-TiO2sol[J]. Proceedings of SPIE-The International Society for Optical Engineering,2009,7493(2):124-127.
[18] Pang R Z,Li X,Li J S,et al. In situ preparation and antifouling performance of Zr O2/PVDF hybrid membrane[J]. Acta Physico-Chimica Sinica,2013,29(12):2592-2598(7).
[19] Li X,Pang R,Li J,et al. In situ formation of Ag nanoparticles in PVDF ultrafiltration membrane to mitigate organic and bacterial fouling[J]. Desalination,2013,324(14):48-56.
[20] Hong X,Zhou Y,Ye Z,et al. Enhanced hydrophilicity and antibacterial activity of PVDF ultrafiltration membrane using Ag3PO4/Ti O2nanocomposite against E. coli[J].Desalination&Water Treatment,2017,75:26-33.
[21]冯雪婷,杨盛,文晨,等,Ag2CO3@PVDF/氧化石墨烯超滤膜及其分离性能[J].化工学报,2017,68(5):2169-2176.
[22] Zhang Y,Liu L,Yang F. A novel conductive membrane with RGO/PVDF coated on carbon fiber cloth for fouling reduction with electric field in separating polyacrylamide[J]. Journal of Applied Polymer Science,2016,133(26):43597.
[23] Ochoa N A,Masuelli M,Maarchese J. Effect of hydrophilicity on fouling of an emulsified oil wastewater with PVDF/PMMA membranes[J]. Journal of Membrane Science,2003,226(1/2):203-211.
[24] Razzaghi M H,Safekordi A,Tavakolmoghadam M,et al.Morphological and separation performance study of PVDF/CA blend membranes[J]. Journal of Membrane Science,2014,470:547-557.
[25]宋春亮,曹义鸣,介兴明,等. PSf对提高PVDF/PSf/Ti O2共混膜抗污染性的作用[J].膜科学与技术,2010,30(4):14-18.