Swelling behavior of gelatin-ionic liquid functional polymers

Rui Nuno Leitão De Carvalho, Nuno Miguel Torres Lourenço, Pedro Miguel Vidinha Gomes, Luís Joaquim Pina Da Fonseca

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)

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.

Original languageEnglish
Pages (from-to)817-825
Number of pages9
JournalJournal Of Polymer Science Part B-Polymer Physics
Volume51
Issue number10
DOIs
Publication statusPublished - 15 May 2013

Keywords

  • diffusion
  • gelatin
  • hydrogels
  • ionic liquids
  • swelling
  • thin films

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