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AMBIENTUM BIOETHICA BIOLOGIA CHEMIA DIGITALIA DRAMATICA EDUCATIO ARTIS GYMNAST. ENGINEERING EPHEMERIDES EUROPAEA GEOGRAPHIA GEOLOGIA HISTORIA HISTORIA ARTIUM INFORMATICA IURISPRUDENTIA MATHEMATICA MUSICA NEGOTIA OECONOMICA PHILOLOGIA PHILOSOPHIA PHYSICA POLITICA PSYCHOLOGIA-PAEDAGOGIA SOCIOLOGIA THEOLOGIA CATHOLICA THEOLOGIA CATHOLICA LATIN THEOLOGIA GR.-CATH. VARAD THEOLOGIA ORTHODOXA THEOLOGIA REF. TRANSYLVAN
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The STUDIA UNIVERSITATIS BABEŞ-BOLYAI issue article summary The summary of the selected article appears at the bottom of the page. In order to get back to the contents of the issue this article belongs to you have to access the link from the title. In order to see all the articles of the archive which have as author/co-author one of the authors mentioned below, you have to access the link from the author's name. |
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STUDIA CHEMIA - Issue no. 4(II) / 2009 | |||||||
Article: |
COMPETING ELECTROCHEMICAL AND CHEMICAL DISSOLUTION OF ALUMINUM IN PHOTOPOLYMERIZED ACRYLIC HYDROGELS. Authors: JEREMY P. WILBURN, CHARLIE DURHAM, MADALINA CIOBANU, ADRIAN PATRUT, DANIEL A. LOWY. |
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Abstract: Dissolution of aluminum in acrylic hydrogels was studied in printed ultra-thin galvanic cells, in open circuit potential, when only chemical corrosion occurred, and in the presence of external current flow, when the aluminium anode was electrochemically dissolved. By the appropriate design of the Al/hydrogel interface we were able to control the rate of electrochemical dissolution, a process driven by the applied voltage (upon short-circuiting the galvanic cell), and to avoid spontaneous chemical dissolution (and thus, maximizing the shelf life of devices in the absence of current flow). Aluminum anodes (thickness of 30-90 nm) were used in conjunction with a graphite or MnO2 cathode. Photopolymerized acrylic gels with incorporated inorganic or quaternary ammonium salts served as the supporting electrolyte. The appearance of the first localized chemical damage of the surface defined the shelf life of the cell, and typically was on the order of days. The choice of anion and cation incorporated in the hydrogel affected both the electrochemical and chemical dissolution of aluminum.
Keywords: aluminum dissolution, aluminum anode, acrylic hydrogel, ultra thin galvanic cell, electrochemistry of aluminum. |
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