Preparation and characterization of ABS/HIPS heterogeneous cation exchange membranes with various blend ratios of polymer binder

Hosseini, S.M.; Madaeni, S.S.; Khodabakhshi, A.R.

doi:10.1016/j.memsci.2010.01.045

Cited by 83 publications

(32 citation statements)

References 31 publications

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“…The potential difference across the membrane (E measure ) was measured by a Biologic-VSP potentiostat connected to Ag/AgCl reference electrodes.. This membrane potential can be expressed by the following Nernst equation [17,21,22,23]:…”

Section: Membrane Potential and Transportation Numbermentioning

confidence: 99%

“…The membrane sample was then removed and the electrical resistance (R 2 ) was measured again. The membrane electrical resistance (R m ) can be calculated as follows: R m = R 1 -R 2 [21,23]. Based on the electrical resistance measurements, through-plane conductivity (σ, S•cm-1) and area resistance (Ω•cm 2 ) can be calculated from the following equation [23,24]:…”

Section: Membrane Conductivity/resistivity Measurementmentioning

confidence: 99%

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Synthesis and characterisation of superhydrophilic conductive heterogeneous PANI/PVDF anion-exchange membranes

et al. 2015

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In this research, polyaniline (PANI)/polyvinylidene fluoride (PVDF) heterogeneous anionexchange membranes were prepared by the solution-casting technique using solvent 1-Methyl-2-pyrrolidone (NMP) and one-step phase inversion in ethanol/deionised water solution. In the membrane-fabrication process, appropriate ultrasonication method was employed to remove bubbles in the casting solutions and achieved more uniform membranes.All membranes exhibited properties of superhydrophilicity, high conductivity, good anion exchange capacity and high water content. The effects of the PANI and PVDF mixture ratio on the properties of prepared membranes were studied, including the ion-exchange capacity (IEC), fixed ion concentration (FIC), transport number and water content. The increase of the PANI ratio in casting solutions resulted in an increase in membrane conductivity and IEC.Further, the results from this work led to a better understanding of the relationships of conductivity and IEC, water content and transport number, which will help to develop efficient anion-exchange membranes for water purification and other industrial applications.

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Section: Membrane Potential and Transportation Numbermentioning

confidence: 99%

Section: Membrane Conductivity/resistivity Measurementmentioning

confidence: 99%

Synthesis and characterisation of superhydrophilic conductive heterogeneous PANI/PVDF anion-exchange membranes

et al. 2015

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“…H + ions in solution were then titrated with 0.01 M NaOH and phenolphthalein indicator. The IEC is calculated from equations were discussed elsewhere [22][23][24][25][26][27][28][29].…”

Section: Determination Of Ionic Exchange Capacity (Iec)mentioning

confidence: 99%

Novelpolyvinyl Chloride-Grafted-Poly (Ethylene Imine) Membranes for Water Treatment Applications: Synthesis and Membrane Characterizations

Eldin¹

2015

AJAC

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Novel polyvinyl chloride grafted poly (ethylene imine), PVC-g-PEI membranes have been successfully synthesized by solvent evaporation technique using THF/ethanol as a solvent mixture. PEI was incorporated into PVC in different portions to increase the weak hydrophilicity of PVC membranes and to enhance physicochemical membranes surface properties. Membranes preparation conditions of PVC-g-PEI and their applications for water desalination process were optimized and discussed in details. PVC-g-PEI membranes were characterized by FTIR, morphologically using SEM, thermally using TGA&DSC, and mechanically using universal testing machine. Poly (ethylene glycol), PEG was then added to PVC-g-PEI membranes as a pore forming additive to increase pores density area and improve efficiency of the permeation flux of membranes. Addition of PEG portions increased permeation flux of PVC-g-PEI membranes2 ) and salt rejection performance for mono membrane (33.5%, 30.8%and 27.4 %) for 3%, 2% and 1% NaCl solutions, respectively. Ion Exchange Capacity (IEC) for (PVC-g-PEI) membrane was 2.3 meq/gm and water uptake was 23%.All filtration experiments results were carried out at a trans-membrane pressure of 0.3 MPa at room temperature. The results showed that the permeate quality and quantity almost stable upon long run, thus PVC-g-PEI membranes can be used effectively for water treatment applications e.g. Nano-filtration and desalination.

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“…To overcome this inherent drawback, a great quantity of work focusing on the preparation of several new membrane components (e.g., poly(ether sulfone) (PES) and sulfonated poly(phenylene sulfide) (SPPS) [9], sulfonated poly(ether ketone ketone) (SPEKK) [10] and sulfonated poly(styrene-ethylene/butylene-styrene) (SSEBS) [11]) or physical modification techniques (e.g., the ultrasonic dispersion [10], the addition of inorganic fillers [12] and surface coating [13]) have been made for the purpose of improving the compatibility of heterogeneous cation exchange membranes. However, the above mentioned improvements have the potential of increasing the membrane's manufacturing cost because they mostly adopt the solution casting method, which involves inconvenient preparation processes and adds the extra cost of solvent consumption.…”

Section: Introductionmentioning

confidence: 99%

Sulfonation Process and Desalination Effect of Polystyrene/PVDF Semi-Interpenetrating Polymer Network Cation Exchange Membrane

et al. 2014

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Abstract:With the classical sulfonation method of polystyrene-based strongly acidic cation exchange resins, polystyrene/polyvinylidene fluoride (PVDF) alloy particles were sulfonated to obtain a cation exchange resin, which was then directly thermoformed to prepare a semi-interpenetrating polymer network (semi-IPN) cation exchange membrane. The effects of the swelling agent, sulfonation time and temperature and the relative contents of polystyrene and divinylbenzene (DVB) in the alloy particles on the feasibility of the membrane formation are discussed. The results indicate that a favorable sulfonation degree above 80% and a suitable ion exchange capacity of 1.5-2.4 mmol/g can be gained, with concentrated sulfuric acid as the sulfonation agent and 1,2-dichloroethane as the swelling agent. The running electrical resistance and desalination effect of the prepared cation exchange membrane were measured in a pilot-scale electrodialyser and not only obviously exceeded a commercial heterogeneous cation exchange membrane, but was also very close to a commercial homogenous membrane. In this way, the authors have combined the classical sulfonation method of polystyrene-based cation exchange resins with the traditional thermoforming manufacturing process of heterogeneous cation exchange membranes, to successfully develop a novel, low-price, but relatively high-performance polystyrene/PVDF cation exchange membrane with the semi-IPN structure.

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Preparation and characterization of ABS/HIPS heterogeneous cation exchange membranes with various blend ratios of polymer binder

Cited by 83 publications

References 31 publications

Synthesis and characterisation of superhydrophilic conductive heterogeneous PANI/PVDF anion-exchange membranes

Synthesis and characterisation of superhydrophilic conductive heterogeneous PANI/PVDF anion-exchange membranes

Novelpolyvinyl Chloride-Grafted-Poly (Ethylene Imine) Membranes for Water Treatment Applications: Synthesis and Membrane Characterizations

Sulfonation Process and Desalination Effect of Polystyrene/PVDF Semi-Interpenetrating Polymer Network Cation Exchange Membrane

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