Fernandes Liliana C, Meira Rafaela M, Correia Daniela M, Ribeiro Clarisse, Fernandez Eduardo, Tubio Carmen R, Lanceros-Méndez Senentxu
Physics Centre of Minho and Porto Universities (CF-UM-UP), University of Minho, 4710-057 Braga, Portugal.
LaPMET-Laboratory of Physics for Materials and Emergent Technologies, University of Minho, 4710-057 Braga, Portugal.
Nanomaterials (Basel). 2022 Sep 4;12(17):3072. doi: 10.3390/nano12173072.
Functional electrospun fibers incorporating ionic liquids (ILs) present a novel approach in the development of active microenviroments due to their ability to respond to external magnetic fields without the addition of magnetic particles. In this context, this work reports on the development of magnetically responsive magneto-ionic fibers based on the electroactive polymer poly(vinylidene fluoride) and the magnetic IL (MIL), bis(1-butyl-3-methylimidazolium) tetrathiocyanatocobaltate ([Bmim][(SCN)Co]). The PVDF/MIL electrospun fibers were prepared incorporating 5, 10 and 15 wt.% of the MIL, showing that the inclusion of the MIL increases the polar -phase content of the polymer from 79% to 94% and decreases the crystallinity of the fibers from 47% to 36%. Furthermore, the thermal stability of the fibers decreases with the incorporation of the MIL. The magnetization of the PVDF/MIL composite fibers is proportional to the MIL content and decreases with temperature. Finally, cytotoxicity assays show a decrease in cell viability with increasing the MIL content.
包含离子液体（ILs）的功能性电纺纤维为活性微环境的开发提供了一种新方法，因为它们能够在不添加磁性颗粒的情况下响应外部磁场。在此背景下，本工作报告了基于电活性聚合物聚偏氟乙烯和磁性离子液体（MIL）双（1-丁基-3-甲基咪唑鎓）四硫氰酸钴酸盐（[Bmim][(SCN)Co]）的磁响应磁离子纤维的开发。制备了包含5%、10%和15%（重量）MIL的PVDF/MIL电纺纤维，结果表明，加入MIL可使聚合物的极性相含量从79%增加到94%，并使纤维的结晶度从47%降低到36%。此外，纤维的热稳定性随着MIL的加入而降低。PVDF/MIL复合纤维的磁化强度与MIL含量成正比，并随温度降低。最后，细胞毒性试验表明，随着MIL含量的增加，细胞活力下降。
