Membrane Science and Technology

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Preparation of PVDF- graft-poly(acrylic acid) UF Membranes

Authors： BIAN Xiaokai SHI Liuqing YU Yang DENG Bo LI Jingye LU Xiaofeng

Units： Shanghai Institute of Applied Physics, Chinese Academy of Sciences

KeyWords： PVDF-graft-poly(acrylic acid); phase inversion method; performance; membrane structure

ClassificationCode：TQ423.2; TQ028.8

year,volume(issue):pagination： 2012, 32(2):10-18

Abstract：

In this paper, PVDF- graft-poly(acrylic acid) (PVDF-g-PAA) was used as the material to prepare UF membrane via the phase inversion method. The solubility parameter of PVDF-g-PAA was tested, the effects of the types of solvent, polymer concentration, additives concentration, as well as the temperature of coagulation bath on the performance and structure of the PVDF-g-PAA membranes were discussed. The results showed that: after being grafted with acrylic acid, the solubility parameter of PVDF-g-PAA was increased and the polarity of this polymer was enhanced. When DMF or NMP was used as solvent in the preparation of UF membranes, the membrane had a denser skin layer, a lower water flux and a higher rejection of BSA; when DMSO was used as solvent, there were some larger pores distributed over the membrane surface layer, and the membrane had the highest water flux and the lowest rejection of BSA; With the increase in the polymer concentration, the membrane structure became denser, the water flux decreased and the rejection of BSA increased; the increase in PEG400 concentration would lead to an increase in membrane flux and a more porous surface layer. Moreover, the thickness of the membranes also increased, and the starting position of macrovoids shifted further inside the membranes; within the temperature range of 12~23℃, with the increase in temperature, the flux of the membrane increased, and the rejection of BSA decreased.

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AuthorIntro：

卞晓锴（1973~），女，助理研究员，在职博士生，1999年开始从事超滤膜的制备研究

Reference：

[1] 李晶，侯铮迟，谢雷东等. γ辐射接枝甲基丙烯酸改善聚醚砜膜亲水性的研究[J]. 辐射研究与辐射工艺学报，2005，23：25-28
[2] Liu Zhen-Mei， Xu Zhi-Kang， Wang Jian-Qin et al。Surface modification of polypropylene microfiltration membranes by graft polymerization of N-vinyl-2pyrrolidone[J]。European Polymer Journal，2004，40：2077~2087
[3] Ulbricht M， Matuschewski H， Oechel A et al.Photo-induced graft polymerization surface modifications for the preparation of hydrophilic and low protein-adsorbing ultrafiltration membranes[J].Journal of Membrane Science，1996，26：31~47
[4] Reddy AVR，Mohan DJ，Bhattacharya A et al.Surface modification of ultrafiltration membranes by preadsorption of a negatively charged polymer: I. Permeation of water soluble polymers and inorganic salt solutions and fouling resistance properties[J].Journal of Membrane Science，2003，214：211~221
[5] Chen Hua，Belfort G. Surface modification of poly(ether sulfone) Ultrafiltration membranes by low-temperature plasma-induced graft polymerization[J].Journal of Applied Polymer Science，1999，72：1699~1711
[6] 吴玉亭，施亚钧. 辐照接枝丙烯酸改性聚砚超滤膜[J]. 水处理技术,1995,21(1):21-25
[7] 陆晓峰，汪庚华，梁国明等. 聚偏氟乙烯超滤膜的辐照接枝改性研究[J]. 膜科学与技术, 1998, 18, (6):54-57
[8] 陈利，褚良银. 智能膜材料和膜技术综述及展望[J]. 过滤与分离，2007,17（3）：1-3
[9] Chen Yiwang, Ying Lei, Yu Weihong, et al. Poly(vinylidene fluoride) with Grafted Poly(ethylene glycol) Side Chains via the RAFT-Mediated Process and Pore Size Control of the Copolymer Membranes[J]. Macromolecules, 2003, 36: 9451-9457
[10] Ying Lei, Wang Peng, Kang E T et al. Synthesis and Characterization of Poly(acrylic acid)-graft-poly(vinylidene fluoride) Copolymers and pH-Sensitive Membranes[J]. Macromolecules, 2002, 35: 673-679
[11] Zhai Guangqun, Ying Lei, Kang E T, et al. Synthesis and Characterization of Poly(vinylidene fluoride) with Grafted Acid/Base Polymer Side Chains[J]. Macromolecules, 2002, 35: 9653-9656
[12] Ying Lei, Kang E T, Neoh K G. Synthesis and Characterization of Poly(N-isopropylacrylamide)-graft-Poly(vinylidene fluoride) Copolymers and Temperature-Sensitive Membranes[J]. Langmuir, 2002, 18: 6416-6423
[13] Zhai Guangqun, Kang E T, Neoh K G. Inimer Graft-Copolymerized Poly(vinylidene fluoride) for the Preparation of Arborescent Copolymers and “Surface-Active” Copolymer Membranes[J]. Macromolecules, 2004, 37:7240-7249
[14] Deng Bo, Li Jingye, Hou Zhengchi, et al. Microfiltration membranes prepared from polyethersulfone powder grafted with acrylic acid by simultaneous irradiation and their pH dependence[J], Radiation Physics and Chemistry, 2008, 77(7):898-906
[15] Deng B, Yu M, Yang XX, et al. Antifouling microfiltration membranes prepared from acrylic acid or methacrylic acid grafted poly(vinylidene fluoride) powder synthesized via pre-irradiation induced graft polymerization[J]. Journal of Membrane Science, 2010, 350: 252-258
[16] Yu M, Zhang BW, Deng B, et al. Introducing reactive groups into polymer chains by radiation induced grafting technique[J]. Plastics, Rubber and Composites, 2010,39: 79-82
[17] Yu M, Zhang BW, Deng B, et al, Preirradiation-Induced Emulsion Graft Polymerization of Glycidyl Methacrylate onto Poly(vinylidene fluoride) Powder[J]. Journal of Applied Polymer Science, 2010, 117: 3575-3581
[18] Yang XX, Deng B, Liu ZY, et al. Microfiltration membranes prepared from acryl amide grafted poly(vinylidene fluoride) powder and their pH sensitive behaviour[J]. Journal of Membrane Science, 2010, 362: 298-305.
[19] Guang-Qun Zhai, Lei Ying, E. T. Kang and K. G. Neoh, Surface and interface characterization of smart membranes, Surface and interface analysis, 2004; 36: 1048–1051
[20] J.F. Hester, A.M. Mayes, Design and performance of foul-resistant poly(vinylidene fluoride) membranes prepared in a single-step by surface segregation, Journal of Membrane Science 202 (2002) 119–135
[21] J.F. Hester, S.C. Olugebefola, A.M. Mayes, Preparation of pH-responsive polymer membranes by self-organization, Journal of Membrane Science 208 (2002) 375–388
[22] Bittino A, Camera-Roda G, Capannelli G, et al. The formation of microporous polyvinylidene difluoride membranes by phase separation.[J]. Journal of membrane science, 1991,57:1~20
[23] Yilmaz L, Mchugh A J. Modelling of asymmetric membrane formation. I. Critique of evaporation and development of a diffusion equation formalism for the quench period.[J]. Journal of membrane science, 1986, 28: 287~310。
[24] Paul D R. Diffusion during the coagulation step of wet-spinning. [J]. Journal of applied polymer science, 1968, 12: 383
[25] C.A.Smolders, A.J. Reuvers, R.M.Boom, I.M.Wienk, Microstructures in phase-inversion membranes. Part 1. Formation of macrovoids. [J], Journal of membrane science, 1992, 73: 259~275
[26] B. Chakrabarty, A.K. Ghoshal, M.K. Purkait, Effect of molecular weight of PEG on membrane morphology and transport properties. [J] Journal of membrane science, 2008, 309: 209~221
[27] Ehsan Saljoughi, Mohammad Amirilargani, Toraj Mohammadi, Effect of PEG additive and coagulation bath temperature on the morphology, permeability and thermal/chemical stability of asymmetric CA membranes. [J]. Desalination, 2010,262:72~78
[28] Jeong-Hoon Kim, Kew-Ho Lee, Effect of PEG additive on membrane formation by phase inversion. [J]. Journal of membrane science, 1998,138:153~163
[29] Tai-Horng Young, Leo-Wang Chen, Roles of bimolecular interaction and relative diffusion rate in membrane structure control. [J].Journal of membrane science, 1993,83:153~166

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