By a News Reporter-Staff News Editor at Journal of Technology -- Investigators discuss new findings in Materials Science. According to news reporting originating in Darmstadt, Germany, by VerticalNews journalists, research stated, "Polymer coatings are frequently utilized to control and modify substrate properties. The performance of the coatings is often determined by the first polymer layers between the substrate and the bulk polymer material, which are termed interphase."
The news reporters obtained a quote from the research from Technical University, "Standard methods have failed to completely characterize this interphase, because its properties change significantly over a few nanometers. Here we determine the spatially resolved adhesion properties of the interphase in polyelectrolyte multilayers (PEMs) by desorbing a single polymer covalently bound to an atomic force microscope cantilever tip from PEMs with varying thickness. We show that the adhesion properties of the first few layers (up to three double layers) is dominated by the surface potential of the substrate, while thicker PEMs are controlled by cohesion in between the PEM polymers. For cohesion, the local film conformation is the crucial parameter."
According to the news reporters, the research concluded: "This finding is generalized by utilizing oligoelectrolyte multilayer (OEM) as coatings and both hydrophilic and hydrophobic polymers as polymeric force sensors."
For more information on this research see: Adhesion Property Profiles of Supported Thin Polymer Films. ACS Applied Materials & Interfaces, 2013;5(13):6300-6306. ACS Applied Materials & Interfaces can be contacted at: Amer Chemical Soc, 1155 16TH St, NW, Washington, DC 20036, USA. (American Chemical Society - www.acs.org; ACS Applied Materials & Interfaces - www.pubs.acs.org/journal/aamick)
Our news correspondents report that additional information may be obtained by contacting B.N. Balzer, Technical Univ Darmstadt, Ernst Berl Inst Makromol Chem, D-64287 Darmstadt, Germany. Additional authors for this research include S. Micciulla, S. Dodoo, M. Zerball, M. Gallei, M. Rehahn, R. von Klitzing and T. Hugel.
Keywords for this news article include: Europe, Germany, Darmstadt, Materials Science
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