Polymers that exhibit high electrical conductivity have successfully been synthesized in the last few decades. Polypyrrole (PPy) has been one of the most extensively studied conductive polymers. Polypyrrol was deposited on the Poly vinyl alcohol (PVA) nanofibers during electrospinning process. Polymerization of the PPy was performed in the vapor phase at various conditions such as oxidant type and oxidant content in the electrospinning solution. For this purpose, a chamber was designed and electrospinning was done in this chamber. Possibility of the chemical deposition of PPy on the surface of the electrospun PVA nanofibers using ammonium persulfate as oxidant was shown. Fiber formation and morphology of the coated nanofibers were studied using a scanning electron microscope (SEM) and conductivity of the nanowebs was determined. The electrical conductivity of the coated nanofiber mats depends on the coating conditions and increases at PVA/oxidant weight ratio of 3/1. Measurement of the electrical conductivity of the coated mats shows electrical conductivity in the range of 10-3
to 1 S/cm depending on the chemical coating conditions.
Key words: Nanofiber, Polypyrrole, Morphology, deposition, Scanning electron microscope, Vapor

Download

مدیر سایت یکشنبه 1 اردیبهشت‌ماه سال 1392 ساعت 08:11 ب.ظ