Development of poly(vinylidene fluoride)/ionic liquid electrospun fibers for tissue engineering applications

J. C. Dias, Daniela C. Correia, Ana C. Lopes, Sylvie Ribeiro, Clarisse Ribeiro, Vitor Sencadas, Gabriela Botelho, José Manuel Silva Simões Esperança, J. M. Laza, J. L. Vilas, Luis M. León, Senentxu Lanceros-Méndez

Research output: Contribution to journalArticle

25 Citations (Scopus)

Abstract

Electroactive electrospun fiber mat composites based on poly(vinylidene fluoride) (PVDF) with 5 and 10 % of 1-ethyl-3-methylimidazolium bis(trifluoromethanesulfonyl)amide ([C2mim][NTf2]) ionic liquid (IL) were developed for potential applications in the biomedical area. The morphology and polymer crystalline phase content of the fibers were evaluated as a function of the processing conditions. Hydrophobic random and aligned fibers have been obtained with average fiber diameters between ~700 and 500 nm, the smaller diameters corresponding to the aligned fiber mats. The results show that the charge structure of [C2mim][NTf2] induces the crystallization of the PVDF fibers in the piezoelectric β-phase with full crystallization in this phase for an ionic liquid content of 10 wt%. Furthermore, the presence of the ionic liquid also increases the degree of crystallinity of the fibers. Thermal degradation studies show a single degradation process which is strongly influenced by the polymer–IL interactions. Finally, the non-cytotoxicity of the fiber mats indicates their suitability for biomedical applications.

Original languageEnglish
Pages (from-to)4442-4450
Number of pages9
JournalJournal of Materials Science
Volume51
Issue number9
DOIs
Publication statusPublished - 1 May 2016

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