Catalytic poly(vinyl alcohol) functionalized membranes obtained by gamma irradiation |
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| Authors: | MH Casimiro AG Silva JV Pinto AM Ramos J Vital LM Ferreira |
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| Institution: | 1. REQUIMTE/CQFB, Departamento de Química, Faculdade de Ciências e Tecnologia, FCT, Universidade Nova de Lisboa, 2829-516 Caparica, Portugal;2. Departamento de Ciência dos Materiais and CENIMAT/I3N, Faculdade de Ciências e Tecnologia, FCT, Universidade Nova de Lisboa, 2829-516 Caparica, Portugal;3. Unidade de Física e Aceleradores, Instituto Tecnológico e Nuclear, ITN, 2656-953 Sacavém, Portugal;1. Materials Research Institute, Athlone Institute of Technology, Dublin Road, Athlone, Co. Westmeath, Ireland;2. Synergy Health Applied Sterilisation Technologies, IDA Business & Technology Park, Sragh, Tullamore, Co. Offaly, Ireland;1. State Key Laboratory of Fine Chemicals, Research and Development Center of Membrane Science and Technology, School of Chemical Engineering, Dalian University of Technology, Dalian, 116024, China;2. School of Petroleum and Chemical Engineering, Dalian University of Technology, Panjin, 124221, China;1. Tissue Engineering Group, Department of Engineering Materials, Kroto Research Institute, University of Sheffield, North Campus, Broad Lane, Sheffield S3 7HQ, United Kingdom;2. The Electrospinning Company Ltd., Rutherford Appleton Laboratory, Harwell Oxford, OX11 0QX, United Kingdom;3. Sudhakar and Sreekant Ravi Stem Cell Lab, LV Prasad Eye Institute (LVPEI), Kallam Anji Reddy Campus, L V Prasad Marg, Hyderabad, 500 034, India;4. Department of Biomedical Science, Univeristy of Sheffield, S3 7HF, United Kingdom;5. Department of Chemistry, Univeristy of Sheffield, S3 7HF, United Kingdom |
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| Abstract: | Polymeric catalytic membranes bearing sulfonic acid functions have been prepared by mutual gamma irradiation at a 60Co source, of poly(vinyl alcohol) (PVA) membranes and methanesulfonic acid. The effect of various synthesis conditions on membranes' physical–chemical properties and catalytic activity in the esterification reaction between acetic acid and isoamyl alcohol to obtain isoamyl acetate (banana flavor), was evaluated. The membranes were characterized by ATR-FTIR, TPP, AFM and SEM. Water contact angle determinations were also performed. The obtained results showed that within the range of conditions studied the increase in sulfonic acid groups' content is accompanied by an enhancement in the membranes catalytic activity, while the increase in absorbed dose leads to a decrease in catalytic activity. |
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