Abstract
Poly(vinylidene fluoride) electrospun membranes have been prepared with different NaY zeolite contents up to 32 wt%. Inclusion of zeolites induces an increase of average fiber size from ~200 nm in the pure polymer up to ~500 nm in the composite with 16 wt% zeolite content. For higher filler contents, a wider distribution of fibers occurs leading to a broader size distribution between the previous fiber size values. Hydrophobicity of the membranes increases from ~115º water contact angle to ~128º with the addition of the filler and is independent on filler content, indicating a wrapping of the zeolite by the polymer. The water contact angle further increases with fiber alignment up to ~137°. Electrospun membranes are formed with ~80 % of the polymer crystalline phase in the electroactive β phase, independently on the electrospinning processing conditions or filler content. Viability of MC3T3-E1 cells on the composite membranes after 72 h of cell culture indicates the suitability of the membranes for tissue engineering applications.
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Acknowledgements
This work was supported by FEDER through the COMPETE Program and by the Portuguese Foundation for Science and Technology (FCT) in the framework of the Strategic Project PEST-C/FIS/UI607/2011 and the project Matepro-Optimizing Materials and Processes, “ref. NORTE-07-0124-FEDER-000037,” co-funded by the “Programa Operacional Regional do Norte” (ON.2—O Novo Norte), under the “Quadro de Referência Estratégico Nacional” (QREN), through the “Fundo Europeu de Desenvolvimento Regional” (FEDER). A.C.L., C.R., and V.S. thank the support of the FCT (Grants SFRH/BD/62507/2009, SFRH/BPD/90870/2012 and SFRH/BPD/63148/2009 respectively).We also thank the support from the COST Action MP0902, Composites of Inorganic Nanotubes and Polymers, COINAPO.
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Lopes, A.C., Ribeiro, C., Sencadas, V. et al. Effect of filler content on morphology and physical–chemical characteristics of poly(vinylidene fluoride)/NaY zeolite-filled membranes. J Mater Sci 49, 3361–3370 (2014). https://doi.org/10.1007/s10853-014-8043-4
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DOI: https://doi.org/10.1007/s10853-014-8043-4