膜科学与技术

Position：Home >> Abstract

Study on the anti-fouling properties of PVDF/SiO2 ultrafiltration membranes: micro-force analysis

Authors： WANG Xin1, WANG Lei1, HUANG Danxi1, MENG Xiaorong1, WANG Lei1, CHEN Licheng2, WANG Xudong1

Units： 1School of Environmental and Municipal Engineering, Xi’an university of Architecture and Technology, Xi’an 710055; 2College of Environment and Chemical Engineering, Xi’an Polytechnic University, Xi’an 710048, China.

KeyWords： PVDF ultrafiltration membrane; nano-SiO2; atomic force microscopy (AFM); hydrophilicity; membrane fouling

ClassificationCode：PVDF超滤膜；纳米SiO2；AFM；亲水性；膜污染

year,volume(issue):pagination： 2014,34(5):73-78

Abstract：

Organic-inorganic plate ultrafiltration membranes were prepared via phase inversion method through blending SiO2 nanoparticles with PVDF. The effects of SiO2 concentration from 1% to 3% on the contact angle, average pore size and permeability of membranes were investigated. The anti-fouling behavior of PVDF/SiO2 membranes was evaluated by macro filtration experiment with BSA as standard foulant. In addition, the micro-forces of membrane-BSA foulant in the fouling process were investigated by atomic force microscope (AFM) in conjunction with self-made foulant-coated colloidal probe. Results revealed that the flux, average pore size and hydrophilicity of the membranes were improved effectively by the additive of SiO2. The performance was optimum when the adding amount of SiO2 was 1%. The above-mentioned conclusions were confirmed by the SEM images of surface and cross-section microstructure. The results of membrane fouling evaluation showed that, for P1 membrane, the flux decline rate was decreased slowly, and the flux recovery rate was improved. Meanwhile, anti-fouling performance was better. The AFM data indicated that the adhesive forces of membranes-BSA foulant were decreased with the hydrophilicity of modified membranes increased, and became smaller as BSA foulant accumulated gradually in the surface of membranes. It illustrated preliminarily that interactions of membranes and BSA foulant was the main reason of membrane fouling. That is, membrane fouling in the initial filtration stage was reduced by the additive of SiO2, which lead to improve the anti-fouling properties of PVDF ultrafiltration membranes.

Funds：

AuthorIntro：

Reference：

[1] 负延滨，刘丽英，马润宇．聚偏氟乙烯膜的研究进展[J]．膜科学与技术，2003，23(2)：57-61．
[2] 顾明浩，张军，王晓琳．聚偏氟乙烯微孔膜制备方法研究进展[J]．工业水处理，2006，26(2)：5-9．
[3] 叶海，芦艳，杨佳等．复合无机纳米颗粒改性有机超滤膜的制备及其性能研究[J]．水处理技术，2011，37(7)：9-11．
[4] A. Bottino, G. Capannelli, V. D'Asti, P. Piaggio. Preparation and properties of novel organic-inorganic porous membranes [J]. Separation and Purification Technology, 22–23 (2001): 269-275.
[5] L.-Y. Yu, Z.-L. Xu, H.-M. Shen, H. Yang. Preparation and characterization of PVDF-SiO2 composite hollow fiber UF membrane by sol-gel method [J]. Journal of Membrane Science, 337 (2009): 257-265.
[6] X. Zuo, S. Yu, X. Xu, J. Xu, R. Bao, X. Yan. New PVDF organic-inorganic membranes: The effect of SiO2 nanoparticles content on the transport performance of anion-exchange membranes [J]. Journal of Membrane Science, 340 (2009): 206-213.
[7] C. Liao, J. Zhao, P. Yu, H. Tong, Y. Luo. Synthesis and characterization of low content of different SiO2 materials composite poly (vinylidene fluoride) ultrafiltration membranes [J]. Desalination, 285 (2012): 117-122.
[8] G.Arthalzareeswaran, T.K.Sriyamuna Devi, M.Raajenthiren. Effeet of silica particles on cellulose acetate blend ultrafiltration membranes: part l [J]. Separation and Purification Technology, 2008, 64:38-47.
[9] Bowen, W. R.; Doneva, T. A.; Stoton, J. A. G.. Protein deposition during cross-flow membrane filtration: AFM studies and flux loss [J]. Colloids and Surfaces B: Biointerfaces, 2002, 27, 103-113.
[10] Bowen, W. R.; Hilal, N.; Lovitt, R. W.; Wright, C. J. A new technique for membrane characterisation: Direct measurement of the force of adhesion of a single particle using an atomic force microscope [J]. Journal of Membrane Science. 1998, 139, 269-274.
[11] Bowen, W. R.; Hilal, N.; Lovitt, R. W; Wright, C. J. Characterization of membrane surfaces: Direct measurement of biological adhesion using an atomic force microscope [J]. Journal of Membrane Science, 1999, 154, 205-212.
[12] Ang, W. S.; Elimelech, M. Protein (BSA) fouling of reverse osmosis membranes: Implications for wastewater reclamation [J]. Journal of Membrane Science.2007, 296, 83-92.
[13] Gan, Y.; Franks, G. V. Cleaning AFM colloidal probes by mechanically scrubbing with supersharp“brushes’ [J]. Ultramicroscopy 2009, 109, 1061-1065.
[14] Zhang W., Stack A.G., Chen Y. Interaction force measurement between E.coli cells and nanoparticles immobilized surfaces by using AFM [J]. Colloids and Surfaces B: Biointerfaces, 2011, 82, 316-324.
[15] Li, Q.; Elimelech, M. Organic fouling and chemical cleaning of nanofiltration membranes: Measurements and mechanisms [J]. Environment Science and Technology, 2004, 38, 468-4693.
[16] 白娟莉，王磊，孟晓荣等．亲水化改性PVDF超滤膜的抗污染特性研究[J]．水处理技术，2011，37(8)：44-47．
[17] Feng C S, Shi B L, Wu Y L, et al. Preparation and properties of microporous membrane from poly(vinylidene fluoride-co-tetrafluoroethylene) (F2.4) for membrane distillation[J]. Journal of Membrane Science, 2004, 237:15-24.
[18] 王磊，王旭东，刘莹等．臭氧预氧化对城市二级处理水中残留有机物分子量分布的影响及超滤膜阻力变化分析[J]．膜科学与技术，2006，26(2)：27-30．
[19] Lei Wang, Rui Miao, Xudong Wang et al. Fouling behavior of typical organic foulants in Polyvinylidene fluoride ultrafiltration membranes: characterization from micro forces [J]. Environment Science and Technology, 2013, 157-198.
[20] Nghiem L D，Hawkes S．Effects of membrane fouling on the nanofiltration of pharmaceutically active compounds(PhACs)：Mechanisms and role of membrane pore size [J]. Separation and Purification Technology, 2007, 57: 176-184．
[21] Hashino, M.; Hirami, K.; Ishigami, T.; Ohmukai, Y.; Maruyama, T.; Kubota, N.; Matsuyama, H. Effect of kinds of membrane materials on membrane fouling with BSA [J]. Journal of Membrane Science, 2011, 384, 157-165.
[22] I.H. Huisman. P. Prádanos. A. Hernández. The effect of protein - protein and protein -membrane interactions on membrane fouling in ultrafiltration [J], Journal of Membrane Science, 179 (2000) 79.

Service：

【Download】【Collect】

《膜科学与技术》编辑部 Address: Bluestar building, 19 east beisanhuan road, chaoyang district, Beijing; 100029 Postal code; Telephone：010-80492417/010-80485372; Fax：010-80485372 ; Email：mkxyjs@163.com