Complex Gel or Coacervate Formation from Polyaspartamides and Tannic Acid
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초록
내용
Several polyaspartamide copolymers were prepared from polysuccinimide, the thermal polycondensation product of aspartic acid, via a successive ring-opening reaction using ethanolamine and other amine nucleophiles. 1H NMR and FT-IR were used to identify the chemical structure of polymers synthesized. Complex gel or coacervate was formed by adding variable amount of tannic acid (TA), as both the chemical crosslinker and adhesive enhancer, to the polymer solution in aqueous system. The complexation behavior was investigated and the adhesive property of the resulting complex gels was measured to compare each other. The thermal property of complex gel was also obtained by using a thermogravimetric analysis and differential scanning calorimetry. The strong multiple hydrogen-bonding interactions between TA and polymer chain are thought to be responsible for making this biocompatible complex gels, potentially useful as a novel biocompatible adhesive material.