Tunable Hydrophilic or Amphiphilic Coatings: A 鈥淩eactive Layer Stack鈥?Approach

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• 作者：Ralf Frenzel ; Susanne H枚hne ; Christian Hanzelmann ; Thomas Schmidt ; Ren茅 Winkler ; Astrid Drechsler ; Eva Bittrich ; Klaus-Jochen Eichhorn ; Petra Uhlmann
• 刊名：ACS Applied Materials & Interfaces
• 出版年：2015
• 出版时间：June 17, 2015
• 年：2015
• 卷：7
• 期：23
• 页码：12355-12366
• 全文大小：760K
• ISSN：1944-8252

文摘

Thin films with tunable properties are very interesting for potential applications as functional coatings with, for example, anti-icing or improved easy-to-clean properties. A novel 鈥渞eactive layer stack鈥?approach was developed to create covalently grafted mono- and multilayers of poly(glycidyl methacrylate)/poly(tert-butyl acrylate) diblock copolymers. Because these copolymers contain poly(glycidyl methacrylate) blocks they behave as self-cross-linking materials after creation of acrylic acid functionalities by splitting off the tert-butyl units. The ellipsometrically determined coating thickness of the resulting hydrophilic multilayers depended linearly on the number of applied layers. Amphiphilic films with tunable wettability were prepared using triblock terpolymers with an additional poly(methyl methacrylate) block. The mechanism of the formation of the (multi)layers was investigated in detail by studying the acidolysis of the surface-linked tert-butyl acrylate blocks by infrared reflection absorbance spectroscopy, accompanied by surface analysis using atomic force microscopy and contact angle measurements. In the case of the amphiphilic and switchable terpolymer layers this reaction was very sensitive to the used acidic reagent.