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RISS 인기검색어
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- 저자 : W. Prissanaroon (검색결과 2 건)
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2SK-8 Role of Conductive Fillers on Properties of Polypropylene Composites for PEMFC Bipolar plates
( Rungsima Yeetsorn ),( Michael W. Fowler ),( Costas Tzoganakis ),( Chaiwat Prapainainar ),( Walaiporn Prissanaroon Ouajai ) 한국공업화학회 2017 한국공업화학회 연구논문 초록집 Vol.2017 No.1
Due to increasing environmental concerns and escalating oil prices, increasing attention is being paid to fuel cell technologies. One of the current barriers to their commercialization is the cost of the components and manufacturing, specifically bipolar plates. Conductive thermoplastic composites are thought to be one of the most promising candidate materials to substitute for metallic and graphite materials in bipolar plates for low temperature fuel cells, such as Proton Exchange Membrane Fuel Cell (PEMFC) or Direct Methanol Fuel Cell (DMFC). Bipolar plates made from thermoplastic carbon composites are light in weight and can be shaped in mold. Research work on bipolar plate materials will bring about the next significant improvement in fuel cell performance by lowering the size, weight and cost of stacks. Our research group focuses on using polypropylene/conductive filler composites with low filler loading as materials for bipolar plate production. The selected conductive fillers used in our work are graphite, carbon fiber, carbon black, and graphene. These composites have a major advantage in that they can be produced by a conventional low-cost injection or compression molding techniques. However, it is difficult to meet desirable conductivity when using the composite plates while maintaining processability. Surface, contact, and volume resistance occurring in fuel cells causes low efficiency fuel cells containing the composite bipolar plates compared to fuel cells containing metallic or graphite bipolar plates. In this regard, several approaches, such as introducing small amounts of polypyrrole to the composites, coating polypyrrole via chemical polymerization or coating copper via electroless deposition on a bipolar plate surface, and inserting metal sheet into the composite plates, were created for reducing the resistance.
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A surface and electrochemical study of polypyrrole coated on stainless steel and copper
J. Liesegang,N. Brack,P. J. Pigram,W. Prissanaroon 한국물리학회 2004 Current Applied Physics Vol.4 No.2-4
The micro-contact printing process (l CP) oers an alternative route for the formation of conducting polymer structures onvarious substrates for application in polymer-based electronic devices. Understanding the surface and interface chemistry of thepolymer/substrate system is a vital element in the production of adherent polymer patterns vial CP. In the present study, electricallyconducting polypyrrole lms doped with dodecylbenzenesulfonic acid, PPy(DBSA), have been electropolymerised on stainless steeland copper substrates in aqueous media. PPy(DBSA)/metal interfaces and PPy(DBSA) surfaces have been characterised by X-rayphotoelectron spectroscopy (XPS) and time-of-ight secondary ion mass spectrometry (TOF-SIMS). An electrochemical study ofPPy(DBSA) growth has been carried out by cyclic voltammetry (CV). Iron and copper were detected at the polymer/electrodeinterfaces indicating their dissolution from the stainless steel and copper substrates, respectively, during electropolymerisation. Inaddition, a thin layer of DBSA was observed at the polymer/electrode interface. The eect of growth potential on doping level wasalso investigated. Adherent PPy coatings on the metal electrodes have been produced and the doping level tailored for optimisationof electroactive devices produced via l CP.
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