| Application of different pore size PVDF/Hyflon composite membranes for vacuum membrane distillation |
| Authors： Zhang Yongxing1, Tong Daqing2, Cao Juan1, Wang Zhaohui1 , Wang Xiaozu1* |
| Units： 1.College of Chemistry and Chemical Technology , Nanjing Tech University , State Key Laboratory of Materials-Oriented Chemical Engineering , Nanjing 210009 2. Air Liquid（Yangzhou）Co., Ltd, Building Dev. No. 18 Weiyang Road, Yangzhou Economic Development Zone, Yangzhou 225009 |
| KeyWords： polyvinylidene fluoride (PVDF);hyflon AD60;pore size;vacuum membrane distillation |
| ClassificationCode：TQ028.8 |
| year,volume(issue):pagination： 2016,36(1):93-98 |
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Abstract： |
| Composite membranes were prepared by coating a hydrophobic copolymer of Hyflon AD60 on porous flat sheet PVDF membranes with three different pore sizes. During the desalination tests using these original and composite membranes, the effect of mean pore sizes on vacuum membrane distillation (VMD) was investigated. The results showed that the flux of original membrane increased when mean pore size increased under the following conditions: (1) the feed temperature was 70℃, (2) feed flow rate was 80L/h, and (3) vacuum was -90kPa. However, its stability decreased. The composite membrane coated with 0.5wt% Hyflon AD60 could steadily run for over 24h. During this process, the biggest flux reached 31.57 kg/(m2.h) and the desalting rate constantly remained above 99.9%. |
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Funds： |
| 江苏省科技支撑计划－工业部分（BE2013128）；江苏双创计划（苏组通〔2011〕37号）；材料化学工程国家重点实验室开放课题KL13-08资助。 |
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AuthorIntro： |
| 张永兴 (1990-)，男，硕士研究生，山东临沂市人，主要研究方向：高分子膜材料制备，Email: zyx9116@163.com，通讯作者：Email: wangxiaozu@njtech.edu.cn |
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Reference： |
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[1] 吴庸烈. 膜蒸馏技术及其应用进展[J].膜科学与技术, 2003, 23(4): 67-73. [2] Alkhudhiri A, N Darwish, N Hilal. Membrane distillation: A comprehensive review[J]. Desalination, 2012, 287: 2-18. [3] 环国兰,杜启云,王薇. 膜蒸馏技术研究现状[J].天津工业大学学报, 2009, 28(4): 12-18. [4] Lawson K W, Lloyd D R. Membrane distillation[J]. Journal of Membrane Science, 1997, 124(1): 1-25. [5] 申龙,高瑞昶. 膜蒸馏技术最新研究应用进展[J].化工进展, 2013, 33(2): 289-297. [6] Kullab A , Martin A. Membrane distillation and applications for water purification in thermal cogeneration plants[J]. Separation and Purification Technology, 2011, 76(3): 231-237. [7] Song L, Ma Z, Liao X, et al. Pilot plant studies of novel membranes and devices for direct contact membrane distillation-based desalination[J]. Journal of Membrane Science, 2008, 323(2): 257-270. [8] Chiam C-K, Sarbatly R. Vacuum membrane distillation processes for aqueous solution treatment—A review[J].Chemical Engineering and Processing: Process Intensification, 2013, 74: 27-54. [9] Sun A C, Kosar W, Zhang Y, et al. Vacuum membrane distillation for desalination of water using hollow fiber membranes[J]. Journal of Membrane Science, 2014, 455: 131-142. [10] El-Bourawi M S, Ding Z, Ma R, et al. A framework for better understanding membrane distillation separation process[J]. Journal of Membrane Science, 2006, 285(1-2): 4-29. [11] 童大庆,石川,汪效祖,等. 整体非对称性PVDF中空纤维膜在真空膜蒸馏中的应用[J].化工新型材料, 2014, 42(7): 217-220. [12] Gugliuzza A, Drioli E. PVDF and HYFLON AD membranes: Ideal interfaces for contactor applications[J]. Journal of Membrane Science, 2007, 300(1-2): 51-62. [13] Gugliuzza A, Drioli E. New performance of hydrophobicfluorinated porous membranes exhibiting particulate-like morphology[J]. Desalination, 2009, 240: 14-20. [14] Macchione M, Jansen J C, Luca G D, et al. Experimental analysis and simulation of the gas transport in dense Hyflon® AD60X membranes: Influence of residual solvent[J]. Polymer, 2007, 48(9): 2619-2635. [15] Garcia-Payo M C, Izquierdo-Gil M A, Fernandez-Pineda C. Wetting Study of Hydrophobic Membranes via Liquid Entry Pressure Measurements with Aqueous Alcohol Solutions[J]. Journal of Colloid and Interface Science, 2000, 230:420-431. |
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