Korean Chemical Engineering Research

The Korean Institute of Chemical Engineers (한국화학공학회)
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One-step Fabrication of a Tannic Acid-Transition Metal-Polymer Gel as a Pressure-Sensitive Adhesive

타닌산-전이 금속-고분자로 구성된 젤의 단일 단계 합성과 점착제로의 이용

  • Lee, Jaehong (Department of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology (KAIST)) ;
  • Lee, Kyoungmun (Department of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology (KAIST)) ;
  • Choi, Siyoung Q. (Department of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology (KAIST))
  • 이재홍 (한국과학기술원 생명화학공학과) ;
  • 이경문 (한국과학기술원 생명화학공학과) ;
  • 최시영 (한국과학기술원 생명화학공학과)
  • Received : 2020.02.06
  • Accepted : 2020.03.06
  • Published : 2020.05.01
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Abstract

In this study, synthesis of a hydrogel consisted of a coordination bond network between small organic molecules and transition metals had been carried out. By adding a tackifying material to the gel, the potential of the gel to be used as an adhesive material had been also confirmed. Synthesis of the adhesive had been done with simple mixing of 3 components: tannic acid, transition metal, and polymer. The tannic acid molecule possesses multiple hydroxyl groups that can form coordination bonds with the transition metals and hydrogen bonds with the hydrophilic polymers. Due to the morphology of the metal-organic complex and polymer dispersed in water, the fabricated material exhibited high adhesiveness and cohesiveness. Optimizing the rheological property had been conducted for use in adhesive by the synthesis with varying the transition metal (Fe3+, Ti4+), polymer, and treatment conditions. Rheological measurement results demonstrate the promising potential of the material as a bio-compatible and versatile pressure-sensitive adhesive with both high adhesiveness and cohesiveness.

이 연구에서는 작은 유기 분자 말단의 하이드록실기와 전이 금속 사이의 배위 결합을 통해 고분자와 유사하게 연결된 복합체를 제작하고, 점착 부여제를 추가하여 해당 물질의 점착제로의 사용 가능성을 확인하였다. 점착제 합성에 사용한 타닌산(tannic acid, TA)은 하이드록실기를 풍부하게 보유하고 있어 전이 금속과는 배위 결합이 가능하고 친수성 고분자와는 수소 결합이 가능하다. 위의 성질을 이용하여 타닌산과 전이 금속, 고분자 세 가지 성분을 한 번에 간단히 섞어 기판에 잘 펴지며 점착 능력을 보유한 특별한 유변 물성을 가지는 물질을 제작하였다. 합성에 사용한 전이 금속의 종류(Fe3+, Ti4+), 고분자의 종류, 처리 조건 등에 따른 유변 물성의 변화를 확인하는 과정을 통해 점착제로 사용하기에 가장 적합한 성분의 조합을 발견하였으며, 인체에 무해하며 높은 응집력과 접착력을 보유한 다목적 점착제로의 사용 가능성을 확인하였다.

Keywords

References

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