The production of nanofibers has attracted increasing attention due to their unique and interesting features such as high surface area to volume ratio and flexibility in terms of surface functionalities. Electrospinning is a novel process that allows the fabrication of fibers with micro/nano diameters from a variety of polymer materials with adjustable parameters that affect the fiber formation. The functionality and applicability of electrospun fibers can be further improved by incorporating additives, such as dyes, bimolecules, carbon nanotubes, etc. Polyvinylcarbazole (PVK) is a polymer with interesting electrical and optical properties; it shows high thermal and chemical stability and good processability. In this study, conductive polymer composite fibers were fabricated by blending PVK with an ink that is composed by silver nanoparticles. The aim was to combine the conducting properties of the metal ink with distinctive properties of polymers such as lightweight and low temperature processing. In order to make the ink conductive silver nanoparticles have to be sintered. The microscopic analysis of the electrospun and annealed samples confirmed the uniform, defect-free microfibers. Conductivities of single fibers containing different silver ink concentrations were measured and it turned out that it was highly dependent on the concentration of the silver ink. There was a sharp increase in the electrical conductivity (2.53E-03 S/cm), by increasing the concentration of silver ink.

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Conductive polyvinylcarbazole microfibers by electrospinning

YAGAR, HAZAL
2015/2016

Abstract

The production of nanofibers has attracted increasing attention due to their unique and interesting features such as high surface area to volume ratio and flexibility in terms of surface functionalities. Electrospinning is a novel process that allows the fabrication of fibers with micro/nano diameters from a variety of polymer materials with adjustable parameters that affect the fiber formation. The functionality and applicability of electrospun fibers can be further improved by incorporating additives, such as dyes, bimolecules, carbon nanotubes, etc. Polyvinylcarbazole (PVK) is a polymer with interesting electrical and optical properties; it shows high thermal and chemical stability and good processability. In this study, conductive polymer composite fibers were fabricated by blending PVK with an ink that is composed by silver nanoparticles. The aim was to combine the conducting properties of the metal ink with distinctive properties of polymers such as lightweight and low temperature processing. In order to make the ink conductive silver nanoparticles have to be sintered. The microscopic analysis of the electrospun and annealed samples confirmed the uniform, defect-free microfibers. Conductivities of single fibers containing different silver ink concentrations were measured and it turned out that it was highly dependent on the concentration of the silver ink. There was a sharp increase in the electrical conductivity (2.53E-03 S/cm), by increasing the concentration of silver ink.
CASTAGNA, ROSSELLA
SAGLIO, BEATRICE
ING - Scuola di Ingegneria Industriale e dell'Informazione
28-apr-2017
2015/2016
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Tesi di laurea Magistrale
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10589/133432