Chemical-Modified Nylon 4 Membrane for Pervaporation |
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| Authors: | Hui-Ling Hu K R Lee J Y Lai |
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| Institution: | 1. Nanya Junior College of Technology, Department of Chemical Engineering Chung Li , Taiwan, 32034, Republic of China;2. Department of Chemical Engineering , Chung Yuan University Chung Li , Taiwan, 32023, Republic of China |
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| Abstract: | Abstract A hydrophilic polymer membrane was synthesized with 2-hydroxyethyl methacrylate (HEMA) onto a Nylon 4 polymer backbone, PHEMA-g-N4. The membranes were water permselective because of the hydrophilicity, and the water permselectivity increased with increasing the degree of grafting. Permseparation of water was investigated with respect to the feed aqueous alcohol concentration, feed temperature, size of the alcohols, and degree of grafting. The separation factors of this PHEMA-g-N4 membrane were higher than those of the unmodified Nylon 4 membrane for pervaporation of aqueous ethanol solution, while the permeation rate was slightly lower. A separation factor of 98 and a 194 g/m2·h permeation rate could be obtained. Compared with an unmodified Nylon 4 membrane, the PHEMA-g-N4 membrane effectively increased the pervaporation separation index for the water-ethanol mixtures on pervaporation separation. |
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| Keywords: | 2-Hydroxyethyl methacrylate Chemical grafting Pervaporation Pervaporation separation index Nylon 4 |
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