Determination of thermodynamic properties of polysulfone/PEG membrane solutions based on Flory-Huggins model

Ariono, Danu; Aryanti, P.T.P.; Hakim, Ahmad N.; Subagjo, S.; Wenten, I Gede

doi:10.1063/1.4982316

Cited by 20 publications

(17 citation statements)

References 28 publications

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“…Similar to PVC membranes, the increase of Wu may be due to an increase membrane hydrophilicity and wettability of modified PVC/additive membrane. Also, PEG400 is naturally hydrophilic which may further increase the water adsorption ability of the membrane . Therefore, the increase of Wu is more pronounced for PVC/additive membranes than PVC‐based membranes (up to 40%).…”

Section: Resultsmentioning

confidence: 99%

Electrochemical Properties of Chemically Treated Polyvinylchloride‐Based Heterogeneous Cation‐Exchange Membrane

Khoiruddin

Ariono

Subagjo

et al. 2018

Polymer Engineering & Sci

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Chemical treatment is a facile method for improving electrochemical properties of a heterogeneous ion‐exchange membrane. In this work, polyvinylchloride (PVC)‐based heterogeneous cation‐exchange membrane is prepared by a dry–wet phase inversion process. The membrane is treated with a sulfuric acid solution in a room and a high temperature (80 °C). Effects of the treatment procedure and hydrophilic additive on membrane electrochemical properties are investigated. Chemically treated PVC and PVC/additive heterogeneous cation‐exchange membranes show a change in membrane electrochemical properties in terms of water uptake (Wu), conductivity, ion‐exchange capacity (IEC), and permselectivity (Ps). In general, Wu and conductivity increase after the chemical treatment. Significant improvement is observed when a high temperature is used. Meanwhile, the conductivity is more pronounced for PVC/additive membranes. The improvement may be associated with an increase in hydrophilicity. A significant increase in IEC is also observed for modified PVC/additive membrane. This may be associated with the removal or leaching of the additive during the treatment which in turn increases the portion of ion‐exchange resins in the membrane. Most of the modified membranes show a decrease in Ps. It may be due to a decrease in the effectiveness of Donnan effect indicated by Donnan equilibrium constant (K+). POLYM. ENG. SCI., 59:E219–E226, 2019. © 2018 Society of Plastics Engineers

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Section: Resultsmentioning

confidence: 99%

Electrochemical Properties of Chemically Treated Polyvinylchloride‐Based Heterogeneous Cation‐Exchange Membrane

Khoiruddin

Ariono

Subagjo

et al. 2018

Polymer Engineering & Sci

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“…It has been reported in several studies that PEG400 helped to increase membrane hydrophilicity as well as membrane porosity. Since PEG400 is soluble in water, the additive could leave the cast solution during the immersion in a coagulation bath.…”

Section: Resultsmentioning

confidence: 99%

Effect of hydrophilic additive and PVC polymerization degree on morphology and electrochemical properties of PVC‐based heterogeneous cation‐exchange membrane

Khoiruddin

Ariono

Subagjo

et al. 2018

J of Applied Polymer Sci

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Membrane solution composition is one of the important factors that determine properties of ion-exchange membranes. In this study, a PVC-based heterogeneous cation-exchange membranes were prepared by the solution casting method. Effects of a hydrophilic additive [poly(ethylene glycol), PEG400] and degree of polymerization of poly(vinyl chloride) (PVC) on the morphology and electrochemical properties of the cation-exchange membranes were investigated. The results revealed that the hydrophilic additive can improve membrane properties, including water uptake (Wu), ion-exchange capacity (IEC), conductivity, and permselectivity. The improvements might be associated with an increase in accessibility of functional sites in the membrane matrix due to a higher hydrophilicity, indicated by a reduction of water contact angle and the greater void fraction shown by scanning electron microscopy. However, the permselectivity slightly decreased when the additive concentration was increased further. Meanwhile, increasing the degree of polymerization and PVC concentration resulted in higher permselectivity and lower conductivity, which might be due to a better resin distribution and a lower void fraction. Overall, the prepared membranes had relatively good conductivities (up to 2.5 mS/cm) and permselectivities (up to 0.92). In general the conductivity increases with increased Wu and IEC, while the permselectivity showed the opposite trends. This could be associated with the efficacy of Donnan exclusion indicated by the IEC/Wu ratio and the Donnan equilibrium constant of the cation (K 1 ).

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“…Most of commercial UF membrane is prepared by immersion precipitation method, which involves the transformation of liquid membrane phase into solid membrane matrix in immersion bath containing a non-solvent [21]. In immersion precipitation method, the final UF membrane structure is influenced by some parameters, i.e.…”

Section: ''""mentioning

confidence: 99%

“…They found that the presence of PEG improved the membrane hydrophilicity signicantly as well as the membrane porosity. The addition of PEG reduces the thermodynamic stability of the membrane solution, which further generates finger-like pore formation in the membrane structure [21].…”

Section: ''""mentioning

confidence: 99%

Modified Polysulfone Ultrafiltration Membrane for Humic Acid Removal During Peat Water Treatment

Aryanti

Noviyani

Kurnia

et al. 2018

IOP Conf. Ser.: Mater. Sci. Eng.

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Abstract. In this research, UF membrane was prepared by blending polysulfone (PSf) in DMAc with the addition of PEG400 and low concentration of acetone as additives. The effect of PSf/PEG400 and polymer/solvent ratio on the performance of PSf membrane was investigated during two hours of peat water filtration. The results showed that the increase of ratio PSF/PEG400 from 1:1 to 1:2.5 improved the membrane hydrophilicity. It was indicated by a decrease of water contact angle from 62 o to 33 o and increased water content in membrane structure from 65 to 74,5%. In addition, the pure water flux also increased up to 200 times. A stable flux is achieved when the ratio PSf/PEG is 1:2 and resulted in 84% rejection of humic acid. The increase of polymer concentration in the membrane solution reduced the pure water flux but increased the rejection of humic acid. Higher polymer concentration in membrane solution reduced fouling tendency towards the membrane surface. It showed that flux decline was reduced from 60% to 40% when the ratio of polymer/solvent concentration was changed from 40/60 to 50/50.

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Determination of thermodynamic properties of polysulfone/PEG membrane solutions based on Flory-Huggins model

Cited by 20 publications

References 28 publications

Electrochemical Properties of Chemically Treated Polyvinylchloride‐Based Heterogeneous Cation‐Exchange Membrane

Electrochemical Properties of Chemically Treated Polyvinylchloride‐Based Heterogeneous Cation‐Exchange Membrane

Effect of hydrophilic additive and PVC polymerization degree on morphology and electrochemical properties of PVC‐based heterogeneous cation‐exchange membrane

Modified Polysulfone Ultrafiltration Membrane for Humic Acid Removal During Peat Water Treatment

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