The Study on the Development of Environmental-friendly Surface Material Using Condensed Tannin

축합형 탄닌을 이용한 친환경 건축마감재 개발에 관한 연구

  • Jo, Jae-Min (Department of Polymer Engineering, The University of Suwon) ;
  • Park, Moon-Soo (Department of Polymer Engineering, The University of Suwon) ;
  • Chung, Kyung-Ho (Department of Polymer Engineering, The University of Suwon)
  • 조재민 (수원대학교 공과대학 신소재공학과) ;
  • 박문수 (수원대학교 공과대학 신소재공학과) ;
  • 정경호 (수원대학교 공과대학 신소재공학과)
  • Received : 2010.04.01
  • Accepted : 2010.06.24
  • Published : 2010.09.30

Abstract

Medium-density fiberboard (MDF) is widely used as an indoor building materials. However, formaldehyde resins, commonly used to bind MDF together, emit formaldehyde and other volatile organic compounds that cause health risk at sufficient concentration. In this study, condensed tannin having formaldehyde absorption ability was used to solve the problem of formaldehyde emission generated from surface material. The synthesis of melamine-formaldehyde resin and reaction of melamine-formaldehyde and condensed tannin were analyzed by FT-IR spectrum. Also surface properties, such as shear force, impact strength, tape adhesion, pencil hardness and gloss retention were measured. Free formaldehyde analysis was performed to analyze remaining unreacted formaldehyde. According to the results, the optimum shear force and impact strength could be obtained by 10 wt.% usage of condensed tannin. In cases of pencil hardness and gloss retention, the optimum properties could be obtained at 20 wt.% of condensed tannin. The amounts of formaldehyde emission of surface material containing 20 wt.% of condensed tannin was 59 ${\mu}g/m^2{\cdot}h$. The amounts of formaldehyde emission could be reduced 3 times by using 20 wt.% of condensed tannin.

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