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    Generic Method for Modular Surface Modification of Cellulosic Materials in Aqueous Medium by Sequential “Click” Reaction and Adsorption

    Year: 2012

    Journal: Biomacromolecules, 2012, 13 (3), pp 736–742, 20120618

    Authors: Ilari Filpponen†, Eero Kontturi*†, Sami Nummelin*‡, Henna Rosilo‡, Erkki Kolehmainen§, Olli Ikkala‡, and Janne Laine*†

    Last authors: Janne Laine

    Organizations: † Department of Forest Products Technology, School of Chemical Technology, Aalto University, P.O. Box 16300, 00076 Aalto, Finland ‡ Department of Applied Physics, School of Science, Aalto University, P.O. Box 15100, 00076 Aalto, Finland § Laboratory of Organic Chemistry, Department of Chemistry, University of Jyväskylä, P.O. Box 35, 400014, Finland

    Country: Finland

    A generic approach for heterogeneous surface modification of cellulosic materials in aqueous medium, applicable for a wide range of functionalizations, is presented. In the first step, carboxymethyl cellulose (CMC) modified with azide or alkyne functionality, was adsorbed on a cellulosic substrate, thus, providing reactive sites for azide–alkyne cycloaddition click reactions. In the second step, functional units with complementary click units were reacted on the cellulose surface, coated by the click-modified CMC. Selected model functionalizations on diverse cellulosic substrates are shown to demonstrate the generality of the approach. The concept by sequentially combining the robust physical adsorption (“physical click”) and robust chemical reaction (“chemical click”) allows versatile, simple, and environmentally friendly modification of a cellulosic substrate with virtually any azide- or alkyne-modified molecule and even functionalization with several types of units.