Porous poly(vinylidene fluoride) (PVDF)/poly(methyl methacrylate) (PMMA) blend five-bore hollow
fiber membranes are prepared by wet phase inversion methods. In spinning these PVDF hollow fibers,
N, N-dimethylacetamide (DMAc) and polyvinyl pyrrolidone (PVP) are used as the solvent and the non-solvent
additive, respectively. The external coagulant uses water. The internal coagulants use water and DMAc-water
solutions. The membranes are characterized in terms of water flux and molecular weight cut-off for the wet
membranes. The cross-sectional structures are examined by scanning electron microscopy (SEM). The effects
of polymer concentration and the internal coagulant on the permeation properties and membrane structures are
examined keeping the bore liquid flow and air-gap constants. Relative high flux, rejection and strengh PVDF
five-bore hollow fiber membranes could be prepared from the polymer concentration in dope solution at 17% of
mass fraction, the air gap distance of 14 cm, and using 10% of mass fraction of DMAc solution as the internal
coagulant at 13mL/min of flow.
HUANG Jian-ping1,2,3 (黄健平), MA Chun-yan2 (马春燕), XI Dan-li2 (奚旦立), YAN Ke-lu1* (阎克路)
. Fabrication of a Novel Porous Poly(Vinylidene Fluoride) Blend Five-Bore Membrane for Wastewater Treatment[J]. Journal of Shanghai Jiaotong University(Science), 2012
, 17(6)
: 701
-705
.
DOI: 10.1007/s12204-012-1349-y
[1] Lloyd D R, Kinzer K E, Tseng H S. Microporous membrane formation via thermally induced phase separation. I. Solid–liquid phase separation [J]. Jounal of Membrane Science, 1990, 52(3): 239-261.
[2] Li X F, Lu X L.Morphology of polyvinylidene fluoride and its blends in thermally induced phase separation process [J]. Journal of Applied Polymer Science, 2006, 101(5): 2944-2952.
[3] Elashmawi I S, Hakeem N A. Effect of PMMA addition on characterization and morphology of the PVDF [J]. Polymer Engineering and Science, 2008, 48(5): 895-901.
[4] Huang C, Zhang L. Miscibility of poly(vinylidene fluoride) and atactic poly(methyl methacrylate) [J]. Journal of Applied Polymer Science, 2004, 92(1): 1-5.
[5] Khayet M, Garca-Payo M C, Qusay F A, et al. Structural and performance studies of poly(vinyl chloride) hollow fiber membranes prepared at different air gap lengths [J]. Journal of Membrane Science, 2009, 330(1-2): 30-39.
[6] Ochoa N A, Masuelli M, Marchese J. Effect of hydrophilicity on fouling of emulsified oil wastewater with PVDF/PMMA membranes [J]. Journal of Membrane Science, 2003, 226(1-2): 203-211.
[7] Rong Jing, Xi Dan-li, Li Yun-qing. Preparation of PVDF/PVC/PMMA blend porous hollow fiber membrane and performance testing thereof [J]. Industrial Water & Wastewater, 2008, 39(5): 65-68 (in Chinese).
[8] Rong Jing, Xi Dan-li, Li Yun-qing. Preparation of porous hollow fiber membranes and effect of posttreatment on membrane performance [J]. China Plastics Industry, 2008, 36(8): 48-51 (in Chinese).
[9] Ma C Y, Huang J P, Xi D L. Preparation, characterization and performance of a novel PVDF/PMMA/TPU blend hollow fiber membrane for wastewater treatment [J]. Water Science & Technology, 2012, 65(6): 1041-1047.
[10] Rajabzadeh S, Maruyama T, Ohmukai Y, et al. Preparation of PVDF/PMMA blend hollow fiber membrane via thermally induced phase separation (TIPS) method [J]. Separation and Purification Technology, 2009, 66(1): 76-83.
[11] Wang D L, Li K, Teo W K. Preparation and characterization of polyvinylidence fluoride (PVDF) hollow fiber membranes [J]. Journal of Membrane Science, 1999, 163(2): 211-220.
[12] Ji B C, Jeong G S, Yoon W S, et al. A zone drawing method to determine optimum polymer concentration and gelation temperature of high molecular weight polymer film [J]. Polymer Testing, 1999, 18(4): 299-311.
[13] Bakeri G H, Ismail A F, Shariaty-Niassar M, et al. Effect of polymer concentration on the structure and performance of polyetherimide hollow fiber membranes [J]. Journal of Membrane Science, 2010, 363(1-2): 103-111.
[14] Nie F Q, Xu Z K, Ming Y Q, et al. Preparation and characterization of polyacrylonitrile-based membranes: Effects of internal coagulant on poly(acrylonitrilecomalefic acid) ultrafiltration hollow fiber membranes [J]. Desalination, 2004, 160(1): 43-50.
[15] Xu A, Yang A, Young S, et al. Effect of internal coagulant on effectiveness of polyvinylidene fluoride membrane for carbon dioxide separation and absorption [J]. Journal of Membrane Science, 2008, 311(1-2):153-158.
