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Information Journal Paper

Title

STUDY OF THE EFFECT OF ACETIC ACID AND POLYETHYLENE GLYCOL ON MORPHOLOGY AND PERFORMANCE OF POLYVINYL ALCOHOL MEMBRANE

Pages

  13-20

Keywords

Not Registered.

Abstract

 The effects of acetic acid and polyethylene glycol (PEG) on morphology and characteristics of polyvinyl alcohol (PVA) membrane were investigated. The membranes were prepared using phase inversion technique. For membrane manufacturing, a dope containing PVA, water and either acetic acid or PEG was prepared. The dope was moulded by casting and floated in a precipitation bath containing Na2So4/ NaOH/ H2O. The results show that addition of acetic acid or PEG to PVA, would change the mechanism of membrane preparation leading to the changes in membrane's morphology and characteristics. Increasing the acetic acid concentration results in reduction in skin layer thickness and increase of its sub layer thickness, porosity and pore size. A reduction in skin layer thickness and porosity results in higher permeability and better membrane performance. This may be explained due to the higher concentration of H3O+ in polymer dope resulting from an increase in acetic acid concentration. Higher concentrations of positive ions facilitate the non-solvent entrance from precipitation bath to polymer dope resulting higher rate for acid-base equilibrium. PEG is a polar and hydrophilic polymer, which performs as an electrolyte in polymer solution. Higher concentration of PEG results in higher rate of non-solvent entrance from precipitation bath to polymer dope. In comparison with acetic acid, PEG shows lower effect on membrane performance (permeability), reduction of skin layer thickness and increase in sublayer thickness.

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    APA: Copy

    MADAENI, S.S., SEMSARZADEH, M.A., POURMOGHADASI, S., & NOMANI, H.. (2003). STUDY OF THE EFFECT OF ACETIC ACID AND POLYETHYLENE GLYCOL ON MORPHOLOGY AND PERFORMANCE OF POLYVINYL ALCOHOL MEMBRANE. IRANIAN JOURNAL OF POLYMER SCIENCE AND TECHNOLOGY (PERSIAN), 16(1 (ISSUE NO. 63)), 13-20. SID. https://sid.ir/paper/6124/en

    Vancouver: Copy

    MADAENI S.S., SEMSARZADEH M.A., POURMOGHADASI S., NOMANI H.. STUDY OF THE EFFECT OF ACETIC ACID AND POLYETHYLENE GLYCOL ON MORPHOLOGY AND PERFORMANCE OF POLYVINYL ALCOHOL MEMBRANE. IRANIAN JOURNAL OF POLYMER SCIENCE AND TECHNOLOGY (PERSIAN)[Internet]. 2003;16(1 (ISSUE NO. 63)):13-20. Available from: https://sid.ir/paper/6124/en

    IEEE: Copy

    S.S. MADAENI, M.A. SEMSARZADEH, S. POURMOGHADASI, and H. NOMANI, “STUDY OF THE EFFECT OF ACETIC ACID AND POLYETHYLENE GLYCOL ON MORPHOLOGY AND PERFORMANCE OF POLYVINYL ALCOHOL MEMBRANE,” IRANIAN JOURNAL OF POLYMER SCIENCE AND TECHNOLOGY (PERSIAN), vol. 16, no. 1 (ISSUE NO. 63), pp. 13–20, 2003, [Online]. Available: https://sid.ir/paper/6124/en

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