By a News Reporter-Staff News Editor at Science Letter -- Investigators publish new report on Materials Science and Physical Chemistry. According to news reporting out of Hawthorn, Australia, by NewsRx editors, research stated, "Recent work on carbon nanotubes (CNT) has focused on their potential application in water treatment as a result of their predicted and observed enhanced flow rates. Recent work on the lesser-known porous anodic alumina membranes (PAAMs) has also shown flow enhancement, albeit at only a fraction of what has been observed in CNTs."
Our news journalists obtained a quote from the research from the Swinburne University of Technology, "Despite their potential applications, little research has been conducted on PAAMs' hydrodynamic properties, and in this Article we present experimental results and theoretical models that explore the fluid flow behavior around and through these membranes. The experiments were conducted using an atomic force microscope (AFM) that pushed a solid silica particle against PAAMs that were characterized with different pore diameters. Furthermore, the PAAMs were classified as either closed or open, with the latter allowing fluid to pass through. The theoretical model developed to describe the experimental data incorporates Derjaguin-Landau-Verwey-Overbeek (DLVO) effects, cantilever drag, and hydrodynamic forces. By using the slip boundary condition for the hydrodynamic forces, we were able to fit the model to experimental findings and also demonstrate that the difference between closed and open PAAMs was negligible."
According to the news editors, the research concluded: "The slip lengths did not correspond to any physical feature of the PAAMs, but our model does provide a simple yet effective means of describing the hydrodynamics for not only PAAMs but for membranes in general."
For more information on this research see: Study of Fluid and Transport Properties of Porous Anodic Aluminum Membranes by Dynamic Atomic Force Microscopy. Langmuir, 2013;29(28):8969-8977. Langmuir can be contacted at: Amer Chemical Soc, 1155 16TH St, NW, Washington, DC 20036, USA. (American Chemical Society - www.acs.org; Langmuir - www.pubs.acs.org/journal/langd5)
Our news journalists report that additional information may be obtained by contacting C. Wu, Swinburne Univ Technol, Fac Life & Social Sci, Hawthorn, Vic 3122, Australia. Additional authors for this research include H.S. Leese, D. Mattia, R.R. Dagastine, D.Y.C. Chan and R.F. Tabor (see also Materials Science and Physical Chemistry).
Keywords for this news article include: Hawthorn, Aluminum, Light Metals, Australia and New Zealand, Materials Science and Physical Chemistry
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