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Authors
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Rauch, S. ; Eichhorn, K.-J. ; Kuckling, D. ; Stamm, M. ; Uhlmann, P.
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Title
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Chain extension of stimuli-responsive polymer brushes: a general strategy to overcome the drawbacks of the "Grafting-to" approach
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Date
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05.12.2013
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Number
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37992
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Abstract
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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 azidealkyne cycloaddition to perform the chain extension of alkyne-functionalized PNiPAAm brushes with azide-functionalized PNiPAAm molecules.
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Publisher
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Advanced Functional Materials
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Wikidata
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Citation
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Advanced Functional Materials 23 (2013) 5675-5681
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DOI
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https://doi.org/10.1002/adfm.201300849
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Tags
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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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