Dissolution Control of Mg by Cellulose Acetate–Polyelectrolyte Membranes

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Journal Title
Journal ISSN
Volume Title
School of Chemical Technology | A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Date
2014
Major/Subject
Mcode
Degree programme
Language
en
Pages
22393-22399
Series
ACS Applied Materials & Interfaces, Volume 6, Issue 24
Abstract
Cellulose acetate (CA)-based membranes are used for Mg dissolution control: the permeability of the membrane is adjusted by additions of the polyelectrolyte, poly(N,N-dimethylaminoethyl methacrylate) (PDMAEMA). Spin-coated films were characterized with FT-IR, and once exposed to an aqueous solution the film distends and starts acting as a membrane which controls the flow of ions and H2 gas. Electrochemical measurements (linear sweep voltammograms, open-circuit potential, and polarization) show that by altering the CA:PDMAEMA ratio the dissolution rate of Mg can be controlled. Such a control over Mg dissolution is crucial if Mg is to be considered as a viable, temporary biomedical implant material. Furthermore, the accumulation of corrosion products between the membrane and the sample diminishes the undesirable effects of high local pH and H2 formation which takes place during the corrosion process.
Description
Keywords
magnesium, spin coating, controlled dissolution, implant material
Other note
Citation
Yliniemi, Kirsi & Wilson, Benjamin. P. & Singer, Ferdinand & Höhn, Sarah & Kontturi, Eero & Virtanen, Sannakaisa. 2014. Dissolution Control of Mg by Cellulose Acetate–Polyelectrolyte Membranes. ACS Applied Materials & Interfaces. P. 22393-22399. 1944-8244 (printed). DOI: 10.1021/am5063597.