Multifunctional e-spun colloidal nanofiber structures from various dispersed blends of PVA/ODA-MMT with PVP/ODA-MMT, poly(VP-alt-MA) and AgNPs incorporated polymer complexes as electro-active platforms

This work presented a new approach to fabricate polymer nanocomposites films with nanofiber structures from solution blends of poly(vinyl alcohol) + octadecyl amine-montmorillonite (ODA-MMT) (matrix) with poly(N-vinylpyrrolidone) + ODA-MMT (partner-1), poly(N-vinylpyrrolidone-alt-maleic anhydride) ((poly(VP-alt-MA)) + (ODA-MMT) (partner-2) and their silver (Ag)-carrying polymer complexes by electrospinning. Chemical and physical structures, surface morphologies, thermal behaviors, electrical conductivity and thermal resistance parameters of nanofiber structures were investigated. Poly(VP-alt-MA) was used both as a crosslinker and a donor of the hydrophilic groups such as -COOH and -NH-C=O amide from pyrrolidone ring. Reactive poly(VP-alt-MA), in situ generated Ag nanoparticles (AgNPs) and original partner polymer had an significant effect on the morphology and diameter distribution of nanofibers. High and excellent conductive behaviors were observed for the homopolymer and copolymer of VP based fiber structures, respectively. Upon successive chemical cross-linking of the nanofiber structures by reactive partner copolymer, the conductivity of nanofiber films as electro-active platforms dramatically increased to 3.90 . 10(-2) S.cm(-1) at room temperature. Comparative analysis results also indicated that electrical properties strongly depended on the loaded reactive organoclay and in situ generated AgNPs

Fabrication And Characterization Of Agnps Incorporated Pva/Oda-Mmt And Pvp/Oda-Mmt Nanofiber Structures By Green Electrospinning Nanotechnology As Excellent Conducting And Bioengineering Nanomaterial

This work presents synthesis and characterization of novel nanofiber structures from the pure water solution blends of poly(vinyl alcohol, hydrolyzed 89%) (PVA/octadecylamine-montmorillonite (ODA-MMT, 5 mass%) as a matrix and poly(N-vinylpyrrolidone) (PVP)/ODA-MMT (5 mass%) as a partner preintercalated nanocomposites and their AgNPs incorporated derivatives by green electrospinning nanotechnology. The chemical and physical structures, surface morphologies, and conductivities were investigated by the Fourier transform infrared, X-ray diffraction, scanning electron microscopy, conducting analysis methods. The fabricated multifunctional nanofibers predominantly exhibit colloidal-like amorphous structures, which is an important factor to improve tendency to self-assembly and therefore, the conductivities of the nanofiber polyelectrolyte structures. Obtained morphologies of composite nanofibers show cross-section structures with fine diameter distribution with higher contact areas. The nanofiber composites show excellent electrical conductivity at temperature range of 20-45 degrees C. The obtained unique properties of multifunctional nanofiber surfaces with higher contact areas can be used for wide applications in microelectronics, sensor devices, nanolithography (X-ray, E-beam and photoresists), electrochemical (surface functionalized electrods) and bioengineering processing.WoSScopu

Cellulose Acetate/ Sodium-Activated Natural Bentonite Clay Nanofibres Produced by Free Surface Electrospinning

Incorporating activated bentonite clay (BC) into electrospun nanofibres is an established strategy for modulating adsorption behaviour. In the present study, naturally occurring calcium BC was completely activated to sodium BC with a 4 wt.% sodium carbonate (Na2CO3)/BC ratio. Composite nanofibre webs were produced from cellulose acetate (CA)/BC spinning solutions using free surface electrospinning and the effect of BC loadings on viscosity, surface tension and electrical conductivity prior to spinning were studied. Chemical and thermal analyses were conducted on as-spun fibres, and SEM and TEM revealed a nanofibrous morphology consisting of an inter-penetrating network of fibres and semi-spherical features resembling jellyfish with an internal core of BC