Hydrophobic/hydrophilic PVDF/Ultem® dual-layer hollow fiber membranes with enhanced mechanical properties for vacuum membrane distillation

被引:112
作者
Zuo, Jian [1 ]
Chung, Tai-Shung [1 ]
O'Brien, Gregory S. [2 ]
Kosar, Walter [2 ]
机构
[1] Natl Univ Singapore, Dept Chem & Biomol Engn, 4 Engn Dr 4, Singapore 117585, Singapore
[2] Arkema Inc, Kynar Ind Prod R&D, 900 First Ave, King Of Prussia, PA 19406 USA
基金
新加坡国家研究基金会;
关键词
Polyvinylidene fluoride (PVDF); Dual-layer hollow fiber; Vacuum membrane distillation (VMD); Seawater desalination; WATER PRODUCTION; SEPARATION PERFORMANCE; DESALINATION PROCESS; COMPOSITE MEMBRANES; CERAMIC MEMBRANES; GAS SEPARATION; FRESH-WATER; PORE-SIZE; FABRICATION; DEHYDRATION;
D O I
10.1016/j.memsci.2016.09.030
中图分类号
TQ [化学工业];
学科分类号
0817 ;
摘要
Dual-layer hydrophobic/hydrophilic PVDF/Ultem (R) hollow fiber membranes with superior mechanical and water transport properties have been prepared via co-extrusion method for vacuum membrane distillation (VMD) of seawater. To fabricate such high-performance dual-layer hollow fibers consisting of two different materials, one must overcome the issues of delamination between the two polymer layers and dense interface morphology. The former would result in a defective membrane, while the latter could significantly increase the substructure resistance for vapor transport. By properly manipulating dope formulation and spinning conditions, we have overcome the first challenge and produced delamination free dual-layer fibers. The second problem is resolved by the addition of Al2O3 nanoparticles into the inner layer dope, which creates micro porosity on the outer surface of the inner layer. The resultant dual-layer fibers show good mechanical properties, permeation flux and wetting resistance simultaneously under VMD operations. Comparing to the conventional single layer MD fibers, the newly developed VMD hollow fiber containing 15 wt% Al2O3 has 4.5- fold tensile strength (i.e., about 350% increment) with a VMD flux of 45.8 kg/m(2)-h at 70 degrees C. This study may provide valuable guidelines in designing superior dual-layer PVDF membranes for practical VMD applications of seawater desalination.
引用
收藏
页码:103 / 110
页数:8
相关论文
共 46 条
  • [1] Experimental and theoretical analyses of temperature polarization effect in vacuum membrane distillation
    Alsaadi, Ahmad S.
    Francis, Lijo
    Amy, Gary L.
    Ghaffour, Noreddine
    [J]. JOURNAL OF MEMBRANE SCIENCE, 2014, 471 : 138 - 148
  • [2] Flux enhancement in membrane distillation by fabrication of dual layer hydrophilic-hydrophobic hollow fiber membranes
    Bonyadi, Sina
    Chung, Tai Shung
    [J]. JOURNAL OF MEMBRANE SCIENCE, 2007, 306 (1-2) : 134 - 146
  • [3] SOLUBILITY PARAMETERS OF POLY(VINYLIDENE FLUORIDE)
    BOTTINO, A
    CAPANNELLI, G
    MUNARI, S
    TURTURRO, A
    [J]. JOURNAL OF POLYMER SCIENCE PART B-POLYMER PHYSICS, 1988, 26 (04) : 785 - 794
  • [4] Membrane distillation and related operations - A review
    Curcio, E
    Drioli, E
    [J]. SEPARATION AND PURIFICATION REVIEWS, 2005, 34 (01) : 35 - 86
  • [5] Effects of additives on dual-layer hydrophobic-hydrophilic PVDF hollow fiber membranes for membrane distillation and continuous performance
    Edwie, Felinia
    Teoh, May May
    Chung, Tai-Shung
    [J]. CHEMICAL ENGINEERING SCIENCE, 2012, 68 (01) : 567 - 578
  • [6] A framework for better understanding membrane distillation separation process
    El-Bourawi, M. S.
    Ding, Z.
    Ma, R.
    Khayet, M.
    [J]. JOURNAL OF MEMBRANE SCIENCE, 2006, 285 (1-2) : 4 - 29
  • [7] Performance evaluation of the DCMD desalination process under bench scale and large scale module operating conditions
    Francis, L.
    Ghaffour, N.
    Alsaadi, A. S.
    Nunes, S. P.
    Amy, G. L.
    [J]. JOURNAL OF MEMBRANE SCIENCE, 2014, 455 : 103 - 112
  • [8] Membrane distillation of NaCl solution containing natural organic matter
    Gryta, M
    Tomaszewska, M
    Grzechulska, J
    Morawski, AW
    [J]. JOURNAL OF MEMBRANE SCIENCE, 2001, 181 (02) : 279 - 287
  • [9] High water recovery in direct contact membrane distillation using a series of cascades
    He, Fei
    Gilron, Jack
    Sirkar, Kamalesh K.
    [J]. DESALINATION, 2013, 323 : 48 - 54
  • [10] Fundamental understanding of nano-sized zeolite distribution in the formation of the mixed matrix single- and dual-layer asymmetric hollow fiber membranes
    Jiang, LY
    Chung, TS
    Cao, C
    Huang, Z
    Kulprathipanja, S
    [J]. JOURNAL OF MEMBRANE SCIENCE, 2005, 252 (1-2) : 89 - 100