Yazar "Bunyatova, Ulviya" seçeneğine göre listele

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    Multifunctional electroactive electrospun nanofiber structures from water solution blends of PVA/ODA-MMT and poly(maleic acid-alt-acrylic acid): effects of Ag, organoclay, structural rearrangement and NaOH doping factors
    (Iop Publishing Ltd, 2016) Simsek, Murat; Rzayev, Zakir M. O.; Bunyatova, Ulviya
    Novel multifunctional colloidal polymer nanofiber electrolytes were fabricated by green reactive electrospinning nanotechnology from various water solution/dispersed blends of poly (vinyl alcohol-co-vinyl acetate) (PVA)/octadecyl amine-montmorillonite (ODA-MMT) as matrix polymer nanocomposite and poly(maleic acid-alt-acrylic acid) (poly(MAc-alt-AA) and/or its Ag-carrying complex as partner copolymers. Polymer nanofiber electrolytes were characterized using FTIR, XRD, thermal (DSC, TGA-DTG), SEM, and electrical analysis methods. Effects of partner copolymers, organoclay, in situ generated silver nanoparticles (AgNPs), and annealing procedure on physical and chemical properties of polymer composite nanofibers were investigated. The electrical properties (resistance, conductivity, activation energy) of nanofibers with/without NaOH doping agent were also evaluated. This work presented a structural rearrangement of nanofiber mats by annealing via decarboxylation of anhydride units with the formation of new conjugated double bond sites onto partner copolymer main chains. It was also found that the semiconductor behaviors of nanofiber structures were essentially improved with increasing temperature and fraction of partner copolymers as well as presence of organoclay and AgNPs in nanofiber composite.
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    Multifunctional Electrospun Biocompatible Nanofiber Composites from Water Dispersion Blends of Folic Acid Conjugated PVP/Dextran/ODA-MMT Nanocomposites and Their Responses to Vero cells
    (2016) Şimşek, Murat; Rzayev, Zakir M. O.; Bunyatova, Ulviya; Khalilova, Sevda; Türk, Mustafa
    This work presents the fabrication and characterization of novel colloidal multifunctional polymer nanofiber composites (NFCs) from water dispersion blends of the intercalated silicate layered nanocomposites of poly(2-vinyl-N-pyrrolidone)/octadecyl amine-montmorillonite (PVP/ODA-MMT) and Dextran/ODA-MMT as matrix and partner polymer intercalated nanocomposites, as well as their folic acid (FA) conjugated derivatives by reactive electrospinning. The chemical and physical structures, surface morphology and responses to Vero cells of NFCs were investigated. Effects of matrix/partner polymer volume ratios, composition, organoclay and FA on the main important parameters of NFCs were evaluated. Cell culture studies showed that NFCs did not exhibit cytotoxicity significantly and also had a low degree of apoptotic and necrotic effects.