Contact
    Start Publications DNA Stickers Promote Polymer Adsorption onto Cellulose
    ←  Publication Finder
    QSense

    DNA Stickers Promote Polymer Adsorption onto Cellulose

    Year: 2012

    Journal: Biomacromolecules 2012, 13, 3173−3180, 20130116

    Authors: Teruaki Sato †, Md Monsur Ali ‡, Robert Pelton §, Emily D. Cranston * §

    Last authors: Emily D. Cranston

    Organizations: †Paper Chemical Division, Arakawa Chemical Industries, Ltd., Osaka, Japan Departments of ‡Biochemistry and Biomedical Sciences and §Chemical Engineering, McMaster University, Hamilton, Canada L8S 4L7

    Country: Japan, Canada

    Adsorption of oligonucleotides onto model cellulose surfaces was investigated by comparing the Boese and Breaker’s cellulose binding oligonucleotide (CBO) with a nonspecific oligonucleotide control (NSO). Measurements using the quartz crystal microbalance with dissipation technique confirmed that CBO adsorbed onto cellulose more than NSO, particularly at high ionic strengths (100 mM CaCl2). CBO showed a higher maximum adsorption on nanofibrillated and nanocrystalline cellulose than on regenerated cellulose, indicating a preference for the native cellulose I crystal structure under conditions that favored specific adsorption over calcium- mediated electrostatically driven adsorption. In addition, an anionic polyacrylamide (A-PAM) with grafted CBO also adsorbed onto the surface of cellulose in CaCl2, whereas the unmodified A-PAM did not. This work shows that CBO performs as a “sticker”, facilitating the adsorption of polyacrylamide onto cellulose, even under high ionic strength conditions where the adsorption of conventional polyelectrolytes is inhibited.