Swelling behavior of gelatin‐ionic liquid functional polymers |
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| Authors: | Rui Nuno Leitão de Carvalho Nuno Miguel Torres Lourenço Pedro Miguel Vidinha Gomes Luís Joaquim Pina da Fonseca |
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| Institution: | 1. Institute for Biotechnology and Bioengineering (IBB), Centre for Biological and Chemical Engineering, Instituto Superior Técnico, Av. Rovisco Pais, 1, 1049‐001 Lisboa, Portugal;2. Departamento de Química, REQUIMTE/CQFB, FCT, Universidade Nova de Lisboa, 2829‐516 Caparica, Portugal;3. Department of Bioengineering, Instituto Superior Técnico, Av. Rovisco Pais, 1, 1049‐001 Lisboa, Portugal |
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| Abstract: | In this work, hydrogels obtained by mixing gelatin with ionic liquids (ILs) are prepared. Two different ILs, emim]EtSO4] and bmim]N(CN)2], are used to prepare hydrogels with different amounts of starting water and phosphate buffer content, which are used after a maturation period. The percentage of swelling in water and phosphate buffer, swelling and diffusion parameters are investigated in thin‐film polymers (1 × 1 cm2; 1‐mm thick) with different maturation times and at temperatures ranging from 4 to 37 °C. emim]EtSO4] polymers show a moderate (100% weight increase) but quick swelling that reaches 80% of the equilibrium within 30 min. They are liquefied and dissolved at temperatures above 25 °C. bmim]N(CN)2] polymers with short maturation times exhibit a similar behavior to the former, but more mature hydrogels register a very small swelling, abnormal kinetics and are more resistant to higher temperatures. © 2013 Wiley Periodicals, Inc. J Polym Sci Part B: Polym Phys., 2013 |
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| Keywords: | diffusion gelatin hydrogels ionic liquids swelling thin films |
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