Adhesion Properties of Dopamine-modified Carboxymethyl Cellulose

DOI Web Site
  • Yuya Itono
    Graduate School of Humanity-Oriented Science and Engineering, Kindai University
  • Kozo Matsumoto
    Faculty of Humanity-Oriented Science and Engineering, Kindai University

Bibliographic Information

Other Title
  • ドーパミン修飾カルボキシメチルセルロースの接着性
  • ドーパミン修飾カルボキシメチルセルロースの接着性 : トリス(ヒドロキシメチル)アミノメタン緩衝液中でのゲル化と低分子ドーパミンを利用した複合化の検討
  • ドーパミン シュウショク カルボキシメチルセルロース ノ セッチャクセイ : トリス(ヒドロキシメチル)アミノメタン カンショウエキ チュウ デ ノ ゲルカ ト テイブンシ ドーパミン オ リヨウ シタ フクゴウカ ノ ケントウ
  • Gel Formation in Tris(hydroxymethyl)aminomethane Buffer Solution and its Use as Composite Material with Monomeric Dopamine
  • トリス（ヒドロキシメチル）アミノメタン緩衝液中でのゲル化と 低分子ドーパミンを利用した複合化の検討

Search this article

Description

<p>Dopamine-modified carboxymethyl cellulose (DOPA-CMC)s with various degrees of DOPA substitution (DS)(7~9%) were synthesized, and their solution behaviors and adhesion properties toward pig skin were investigated under various conditions. DOPA-CMC (DS9%) in phosphate buffer solutions (PBS, pH6.0, pH7.0, pH8.0) was a colorless liquid, while its solution in tris(hydroxymethyl)animomethane buffer solution (Tris buffer solution, pH8.0) changed to a brown gel.The polymer solution was cast on a pig skin strip to obtain the polymer film. The test piece was prepared by crimping the polymer film to another pig skin strip and by drying for 24 h. Then the tensile shear strength of the sample was measured; this value was evaluated as dry adhesion strength. An analogously prepared sample was further immersed in water for 1 h and the tensile shear strength was measured; this value was evaluated as wet adhesion strength. The dry adhesion strengths of the test piece prepared from the PBS (pH6.0-8.0) solutions were high and almost constant at 0.71 MPa－0.53 MPa, while the wet adhesion strengths remained low at 0.04 MPa－0.07 MPa. The dry adhesion strength of the test piece prepared from the Tris(pH8.0) buffer solution was 0.63 MPa, but its wet adhesion strength rose to 0.16MPa, which was significantly higher than those of the PBS solutions. This high wet adhesion strength of the Tris buffer solution was supposed to be caused by the crosslink of the DOPA-CMC due to the oxidative coupling of the DOPA groups. We also found that composite materials prepared by mixing DOPA-CMC (DS7%) and DOPA in the Tris buffer solution showed higher wet adhesion strength than that without DOPA.</p>

Journal

Keywords

Details 詳細情報について

Report a problem

Back to top