Article history: Two cationic polymers containing vinyl and quaternary ammonium groups were successfully grafted on Received 22 July 2015 silicone surfaces containing Si H groups. The reaction was carried out by straightforward hydrosilylation Received in revised form 30 October 2015 reaction in water without using exogenous catalyst and without doping the surface with Si H groups. Accepted 8 November 2015 The Si H content was varied by changing the curing time or the ratio between silicone components. Available online 12 November 2015 14 15 The surfaces obtained exhibited quaternary ammonium densities ranging from 1.8 × 10 to 2.8 × 10 charge/cm and higher polarity and hydrophilicity in comparison with non grafted surfaces. Bactericidal Keywords: effects of these surfaces against Escherichia coli and Staphylococcus epidermidis were evidenced. This Bactericidal surfaces study have evidenced also the fouling of the poly(quaternary ammonium) (PQA) surfaces by contact Surface charge density with plasmatic proteins probably limiting their use in some biomedical ﬁeld (e.g. implantable medical Cationic polymers devices). Silicones Hydrosilylation © 2015 Elsevier B.V. All rights reserved. Protein adsorption 1. Introduction advantages comparing to small molecules, i.e. high surface cover- age and stability as well as high bioactivity. Antimicrobial coatings are used in various
Applied Surface Science – Elsevier
Published: Jan 1, 2016
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