| Summary: | 碩士 === 國立高雄應用科技大學 === 化學工程與材料工程系博碩士班 === 101 === Preparation and Study of
Polyacrylonitrile(PAN)-Polyvinylpyrrolidone(PVP)/Silver
Nanocomposite Fibers
Student：Ching-Lun Liu Advisors：Dr.Tar-Hwa Hsieh
Department of Chemical and Materials Engineering
National Kaohsiung University of Applied Sciences
Abstract
In this study, Polyacrylonitrile – polyvinylpyrrolidone / silver
(PAN-PVP/Ag) composite nanofibers were fabricated by electrospinning, where PAN and PVP behaved as the matrix and protecting agent, AgNO3 as the precursor of silver and dimethylformamide (DMF) as the reductant respectively. The silver nanoparticles are reduced via chemical reduction, protecting agent stabilized the growth of Ag particle and crystallized via thermal treatment. Results revealed that the diameter and amount of the fcc-structured Ag are significantly dependent on the concentrations of AgNO3, reductants and protecting agent. As compared with degraded PAN, when the concentration of AgNO3/DMF is 1M, the as-spun PAN-PVP/Ag composite nanofiber exhibits high transmittance (25% ~ 65%) (The transmittance are dependent on the degree pyrolysis of PAN) and low resistance (0 - 1x106 Ω/□) after heat treatment at 400 ℃ for 30 min, which is mainly contributed by the thermal degradation of PAN.
Keywords: Electrospinning、Ag nanoparticles、Polyacrylonitrile 、Protecting agent、Chemical reduction
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