title: Generic method for modular surface modification of cellulosic materials in aqueous medium by sequential "click" reaction and adsorption.
abstract: 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.
authors.affiliation: Department of Forest Products Technology, School of Chemical Technology, Aalto University , P.O. Box 16300, 00076 Aalto, Finland.
authors.forename: Ilari
authors.initials: I
authors.lastname: Filpponen
authors.forename: Eero
authors.initials: E
authors.lastname: Kontturi
authors.forename: Sami
authors.initials: S
authors.lastname: Nummelin
authors.forename: Henna
authors.initials: H
authors.lastname: Rosilo
authors.forename: Erkki
authors.initials: E
authors.lastname: Kolehmainen
authors.forename: Olli
authors.initials: O
authors.lastname: Ikkala
authors.forename: Janne
authors.initials: J
authors.lastname: Laine
mesh_terms: D000480:Alkynes / Q000737:chemistry* / Q000378:metabolism; D000818:Animals; D001386:Azides / Q000737:chemistry* / Q000378:metabolism; D002266:Carboxymethylcellulose Sodium / Q000737:chemistry* / Q000378:metabolism; D002384:Catalysis; D002417:Cattle; D032561:Cotton Fiber; D005456:Fluorescent Dyes / Q000378:metabolism; D009682:Magnetic Resonance Spectroscopy; D018625:Microscopy, Atomic Force; D056951:Photoelectron Spectroscopy; D011092:Polyethylene Glycols / Q000378:metabolism; D012710:Serum Albumin, Bovine / Q000378:metabolism; D017550:Spectroscopy, Fourier Transform Infrared; D013499:Surface Properties; D014867:Water / Q000737:chemistry*
chemical_list: D000480:Alkynes; D001386:Azides; D005456:Fluorescent Dyes; D014867:Water; D012710:Serum Albumin, Bovine; D011092:Polyethylene Glycols; D002266:Carboxymethylcellulose Sodium