Poly(vinyl alcohol) and poly(vinyl amine) blend membranes for isopropanol dehydration |
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Authors: | Shivshankar Chaudhari YongSung Kwon MyungJun Moon MinYoung Shon SeungEun Nam YouIn Park |
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Affiliation: | 1. Department of Industrial Chemistry, Pukyong National University, San 100, Yongdang‐Dong, Nam‐Gu, Busan, Korea;2. Center for Membranes, Korea Research Institute of Chemical Technology, 141 Gajeong‐ro, Yuseong‐gu, Daejeon, Korea |
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Abstract: | Blended membranes of hydrophilic polymers poly(vinyl alcohol) (PVA) and poly(vinyl amine) (PVAm) were prepared and crosslinked with glutaraldehyde. The prepared membranes were characterized using infrared (attenuated total reflection mode) spectroscopy, differential scanning calorimetry, X‐ray diffractometry, and scanning electron microscopy measurements. Pervaporation performances of the membranes were evaluated for the separation of water‐isopropanol (IPA) mixtures. As the PVAm content increased from PVAm0 to PVAm1.5, the flux through a 70 μm film increased from 0.023 to 0.10 kg/m2 h at an IPA/water feed ratio of 85/15 at 30 °C. The driving force for permeation of water increased due to the temperature but it has no effect on IPA permeation. Activation energies for the permeation of IPA and water were calculated to be 17.11 and 12.46 kJ/mol, respectively. Controlling the thickness of the blend membrane could improve the permeation flux with only a marginal reduction in the separation factor. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017 , 134, 45572. |
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Keywords: | blend membrane glutaraldehyde pervaporation poly(vinyl alcohol) poly(vinyl amine) |
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