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dc.contributor.advisorValentín, Ricky
dc.contributor.authorVega-Avila, Ana L.
dc.description.abstractThis thesis presents the morphological and electrochemical characterization of composite membranes prepared from Polyacrylonitrile (PAN), Multi-Walled Carbon Nanotubes (MWCNT), and Catalase composites for applications as bioelectrodes in fuel cells. The composite membranes were prepared by solvent casting and electrospinning. We have studied the effect of processing parameters and the concentration of carbon nanotubes in the morphological characteristics and electrochemical response of the bioelectrode. The electrochemical characterization was conducted using cyclic voltammetry, while morphological characterization of the membranes was performed using optical microscopy and scanning electron microscopy (SEM). The enzymatic loading in the electrode was measured using Bradford method. Catalase was immobilized by covalent bonding and the electrochemical response of the bioelectrodes was tested in presence of hydrogen peroxide (H2O2). The electrochemical characterization allows concluding that electrospun fibers with concentrations of 5% and 2% of MWCNT are the best material of the evaluated to be used as bioelectrodes supports.
dc.description.abstractEn este trabajo se presenta la caracterización morfológica y electroquímica de fibras y membranas preparadas a partir del compuesto Poliacrilonitrilo (PAN) y nanotubos de carbono de múltiples paredes (MWCNT), para una posible utilización como biocatodo en celdas de combustible usando la enzima catalasa catalizador. Las fibras fueron preparadas por “electrospinning”, mientras que las membranas fueron preparadas por “solvent casting”. Se evaluó la incidencia del contenido de MWCNT en la morfología y en la respuesta electroquímica de las fibras y membranas. La caracterización electroquímica fue realizada mediante voltametría cíclica y la caracterización morfológica fue realizada a través de microscopia óptica y microscopia electrónica de barrido (SEM). La carga enzimática en los electrodos fue determinada usando el método de Bradford. La caracterización electroquímica permitió establecer que de los evaluados, el mejor material para ser usado como soporte en los biocátodos son las fibras con las concentraciones de 2% y 5% de MWCNT.
dc.description.sponsorshipNANOmaterials Processing Lab – Engineering Science and Materials Department; ARGONE national laben_US
dc.subjectcarbon nanotubesen_US
dc.subject.lcshCarbon nanotubesen_US
dc.subject.lcshFuel cells--Electrodesen_US
dc.titlePolyacrilonitrile carbon nanotubes (PANCNT) nanocomposites for bio fuel cells cathodeen_US
dc.rights.licenseAll rights reserveden_US
dc.rights.holder(c) 2011 Ana Lucía Vega Avilaen_US
dc.contributor.committeeSingh, Surinder
dc.contributor.committeeCaceres, Pablo
dc.contributor.representativeMonroig, Francisco M. Engineeringen_US
dc.contributor.collegeCollege of Engineeringen_US
dc.contributor.departmentDepartment of Mechanical Engineeringen_US

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    Items included under this collection are theses, dissertations, and project reports submitted as a requirement for completing a graduate degree at UPR-Mayagüez.

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