Authors Rauch, S. ; Eichhorn, K.-J. ; Kuckling, D. ; Stamm, M. ; Uhlmann, P.
Title Chain extension of stimuli-responsive polymer brushes: a general strategy to overcome the drawbacks of the "Grafting-to" approach
Date 05.12.2013
Number 37992
Abstract Stimuli-responsive polymer brushes are smart materials for the design of bio-interactive and responsive interfaces. The “grafting-to” approach is a convenient preparation procedure that allows the modification of surfaces with preformed and most notably well-defined functionalized macromolecules. However, the shortcoming of this approach is an intrinsic limitation of the grafting density, which in turn affects the stimuli-responsive properties of the brush system. Here, a general strategy to overcome this limitation and to simultaneously improve the switching behavior of a temperature-responsive poly(N-isopropylacrylamide) (PNiPAAm) brush is reported. A technically simple processing step is used in combination with the thermal azide–alkyne cycloaddition to perform the chain extension of alkyne-functionalized PNiPAAm brushes with azide-functionalized PNiPAAm molecules.
Publisher Advanced Functional Materials
Citation Advanced Functional Materials 23 (2013) 5675-5681
Tags stimuli-responsive materials polymer brushes functionalized polymers surface modification protein adsorption poly(n-isopropylacrylamide) brushes spectroscopic ellipsometry radical polymerization n-isopropylacrylamide block-copolymers cross-linking layers

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