Highly thermal resistance hydrophobic poly(vinyl alcohol)–silica hybrid nanofibers

Mustafa Hulusi Ugur, Burcu Oktay, Atilla Gungor, Nilhan Kayaman-Apohan


In this study, we report the preparation of hydrophobic and crosslinked poly(vinyl alcohol)/silica organic-inorganic hybrid nanofibers via sol-gel electrospinning method. Silica was produced through acetic acid catalyzed reaction of a silica precursor consists of dimethyl dimethoxysilane (DMDMS), methyl trimethoxysilane (MTMS), tridecafluoro-1,1,2,2-tetrahydrooctyl triethoxysilane (FAS; Dynasylan®F8261) and phenyl trimethoxysilane (PTMS; Dynasylan®9165) in isopropyl alcohol–water mixture. Hybrid nanofibers were realized with electrospinning of the silica precursor and PVA aqueous solution. Chemical, structural, thermal and surface analyses have been conducted by Fourier-transform infrared spectroscopy (FTIR), thermogravimetric analysis (TGA), scanning electron microscopy-energy-dispersive X-ray (SEM/EDX) and water contact angle (WCA) methods, respectively. The obtained hybrid nanofibers are insoluble in aqueous solution. SEM images displayed that highly cross-linked and porous structures were obtained and the average fiber diameter of poly(vinyl alcohol) (PVA)/silica nanocomposite were around 70 nm. A nanofiber surface with 130° water contanct angle was achieved. 


poly (vinyl alcohol); electrospinning; sol-gel; hybrid nanofibers

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DOI: https://doi.org/10.2298/JSC171121032H

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