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Showing 1–4 of 4 results
Advanced filters: Author: Kaya Tokuda Clear advanced filters

  • Poly(methyl methacrylate) surface was fluorinated by simply immersing into 3-(perfluoro-7-methyloctyl)-1,2-epoxypropene, followed by heat treating at 120 °C. The contact angle of water for fluorinated PMMA increased to 111° after the treating. This value corresponds to the surface free energy of 10 mJ m−2, which is much lower than that (18 mJ m−2) of polytetrafluoroethylene. The fluorinated PMMA showed low albumin adsorption. When materials come into contact with blood, protein will rapidly adsorb onto the surfaces, which plays a trigger of clotting. However, protein adsorption was reduced on this very hydrophobic surface.

    • Kaya Tokuda
    • Tomoya Ogino
    • Takashi Nishino
    Research
    Polymer Journal
    Volume: 47, P: 66-70

  • A polymer surface was modified by dip coating a mixture of three kinds of polymers: methacrylate-based terpolymers containing both perfluoroalkyl (Rf) groups and poly(ethylene oxide) (PEO) as side chains, vinylidenefluoride-tetrafluoroethylene copolymer (CH2CF2)80(CF2CF2)20, and poly(methyl methacrylate) (PMMA). These modified surfaces showed resistance to nonspecific protein adsorption, antithrombogenicity and resistance to cell adhesion due to surface-segregated PEO chains. We also succeeded in covalent conjugation of biotin with the termini of PEO chains and demonstrated the immobilization of streptavidin on the dip-coated surface.

    • Kaya Tokuda
    • Miki Noda
    • Takashi Nishino
    Research
    Polymer Journal
    Volume: 47, P: 328-333

  • We studied the surface functionalization of PP by dip-coating with a maleic anhydride-grafted chlorinated polypropylene (MPO) /methacrylate-based terpolymer mixture. A methacrylate-based terpolymer (PMFP) was synthesized, which contained perfluoroalkyl (Rf)-conjugated monomers and poly(ethylene glycol)-conjugated monomers. We found that the presence of MPO aided the adhesion of the terpolymer to the PP surface and that the coated PP surface exhibited low protein-fouling properties. In addition, the dip-coating of a terpolymer containing reactive groups (–COOH) with MPO caused the reactive groups to be presented at an outermost surface.

    • Manami Hara
    • Shigeru Kitahata
    • Tatsuo Maruyama
    Research
    Polymer Journal
    Volume: 51, P: 489-499