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Showing 1–4 of 4 results
Advanced filters: Author: Daisaku Kaneko Clear advanced filters

  • We have synthesized novel Mussel-mimetic adhesive resin from biomass monomers. Because the adhesive resin contains catechol group at their chain ends, which is similar chemical structure of 3,4-dihydroxyphenyl-L-alanine (DOPA) produced by Mussel, it demonstrated strong adhesive characteristics onto organic and/or inorganic surfaces beyond the conventional instant superglue as shown in figures (X, conventional instant superglue; Y, poly(DHCA-co-4HCA) resin). The origin of this strong adhesive characteristic was discussed by strong type of hydrogen bond interaction between our new resins and oxidized and/or OH group on the substrates.

    • Daisaku Kaneko
    • Siqing Wang
    • Tatsuo Kaneko
    Research
    Polymer Journal
    Volume: 43, P: 855-858

  • For the purpose of an electric paper application, alginate hydrogel particles were prepared. To increase their zeta potential for well response by electric fields, their surface were modified chemically. Electro-response behaviors were observed between comb-shaped electrodes. It was found that surface-modified alginate hydrogel particles were well responded by applied low voltage 4–9 V.

    • Daisaku Kaneko
    • Nguyen Quyen Thi le
    • Tatsuo Kaneko
    Research
    Polymer Journal
    Volume: 42, P: 829-833

  • We measured the single-molecule interaction force between various hydroxybenzoic acids and a Si3N4 cantilever by atomic force microscopy in force curve mode. The adhesion properties of hydroxybenzoic acids with different numbers of hydroxyl groups in various positions on the aromatic ring were compared to determine the effect of the hydroxyl groups on single-molecule interactions. It was found that as the number of hydroxyl group increases, the number of single-molecule interactions increases and the interaction force also increases. A catecholic system with two hydroxyl groups on the aromatic ring, similar to that found in mussel adhesive, has been well studied. Here we demonstrate that gallic acid with three hydroxyl groups on the aromatic ring showed good adhesion and a large number of single-molecule interactions. We synthesized gallic acid adhesives that exhibited sufficiently strong adhesion (10 MPa) to be of practical use.

    • Shougo Kinugawa
    • Siqian Wang
    • Daisaku Kaneko
    Research
    Polymer Journal
    Volume: 48, P: 715-721