Preparation of felt-metal supported modified polyvinyl alcohol composite hydrophilic ultrafiltration membrane

Abstract

A novel technology of preparation of felt-metal supported modified polyvinyl alcohol(PVA) ultrafiltration(UF) membrane was invented, which could avoid the blockage of the holes of support layer and the leakage of the casting solution through the holes of support layer. Felt-metal supported ferric sulfate modified PVA composite UF membranes were prepared by the innovative technology. The results show that the composite membranes are used to treat 1 000 mg/L oil/water emulsion at trans-membrane pressure from 0.25 to 0.45 MPa, the permeate flux is from 36 to 52 L/(m² · h), and the retention of chemical oxygen demand(COD) is over 92%. The composite membrane resistance increases with the increase of trans-membrane pressure.

Keywords

polyvinyl alcohol / composite membrane / hydrophilicity / ultrafiltration / modification

References

[1] MüllerC H, AgarwalG P, MelinT, et al.. Study of ultrafiltration of a single and binary protein solution in a thin spiral channel module[J]. J Membr Sci, 2003, 227(1–2): 52-69

[2] QinJian-jun, ChungTai-shung. Effect of dope flow rate on the morphology, separation performance, thermal and mechanical properties of ultrafiltration hollow fibre membranes[J]. J Membr Sci, 1999, 157(1): 35-51

[3] HuXian-guo, Bekassy-MolnarE, VataiG. Study of ultrafiltration behaviour of emulsified metalworking fluids[J]. Desalination, 2002, 149(1–3): 191-197

[4] WuChi-sheng, LeeEn-hsien. Ultrafiltration of soybean oil/hexane extract by porous ceramic membranes[J]. J Membr Sci, 1999, 154(2): 251-259

[5] BullonJ, CardenasA, SancheiJ. Emulsion filtration through surface modified ceramic membrane[J]. J Dispersion Sci & Technol, 2002, 23(1–3): 269-277

[6] XuNan-ping. Recent development of inorganic membrane[J]. Chemical Industry and Engineering Progress, 2000, 19(4): 5-9

[7] GhoshR, CuiZ F. Protein purification by ultrafiltration with pre-treated membrane[J]. J Membr Sci, 2000, 167(1): 47-53

[8] SivakumarM, MalaisamyR, SajithaC J, et al.. Ultrafiltration application of cellulose acetate-polyurethane blend membranes[J]. European Polymer Journal, 1999, 35(9): 1647-1651

[9] GholamiM, NasseriS, FengC Y, et al.. The effect of heat-treatment on the ultrafiltration performance of polyethersulfone (PES) hollow-fiber membranes[J]. Desalination, 2003, 155(3): 293-301

[10] OkazakiI, OhyaH, SemenovaS, et al.. Nanotechnological method to control the molecular weight cut-off and/or pore diameter of organic-inorganic composite membrane[J]. J Membr Sci, 1998, 141(1): 65-74

[11] BottinoA, CapannelliG, ComiteA. Preparation and characterization of novel porous PVDF-ZrO₂ composite membranes[J]. Desalination, 2002, 146(1–3): 35-40

[12] HeT, MulderM, StrathmannH, et al.. Preparation of composite hollow fiber membranes: Co-extrusion of hydrophilic coatings onto porous hydrophobic support structures[J]. J Membr Sci, 2002, 207(2): 143-156

[13] WuCui-ming, XuTong-wen, YangWei-hua. Development of the preparation for inorganic — organic membranes[J]. Journal of Inorganic Material, 2002, 17(4): 641-648(in Chinese)

[14] QiuYun-ren, ZhangQi-xiu. Preparation and properties of metal-PVA composite hydrophilic ultrafiltration membrane[J]. J Cent South Univ Technol (English Edition), 2003, 10(2): 117-121

[15] QiuYun-ren, ZhangQi-xiu, WuZheng-dong. Preparation and properties of modified polyvinyl alcohol ultrafiltration membranes[J]. Membr Sci & Tech, 2001, 21(5): 25-28(in Chinese)

[16] ZHANG Qi-xiu, QIU Yun-ren. Preparation of the composite MF or UF membranes supported by feltmetal[P]. CN 1528497A, 2004 - 09 - 15. (in Chinese)