Korean Chemical Engineering Research

The Korean Institute of Chemical Engineers (한국화학공학회)
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Evaluating the Properties of Medium-density Fiberboard Made with a Rapeseed Flour-based Adhesive Resin and Establish of the Optimal Fabricating Conditions for its Commercialization

유채박-기반 접착제로 제조한 중밀도섬유판의 물성 평가 및 상용화를 위한 최적 제조조건의 확립

  • In Yang (Institutes of Green Bio Science & Technology, Seoul National University) ;
  • Sei Chang Oh (Department of Forest Resources, Daegu University)
  • 양인 (서울대학교 그린바이오과학기술연구원) ;
  • 오세창 (대구대학교 산림자원학과)
  • Received : 2024.04.30
  • Accepted : 2024.09.04
  • Published : 2024.11.01
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Abstract

This study was conducted to confirm the potential of adhesive resins formulated with rapeseed flour (RSF), which is a residue in the production of edible oil, for the manufacture of medium-density fiberboards (MDF). The RSF-based adhesive resins were formulated with the weight ratio of RSF hydrolyzates (80, 70, 60 wt%) to PF prepolymer(20, 30, 40 wt%), MDF was fabricated in accordance with its resin content and target density using the RSF-based adhesive resin, and then the physical properties(density, moisture content, bending strength, internal bonding strength and thickness swelling) and formaldehyde emission of the MDF were measured. The effect of the weight ratio of RSF hydrolyzate to PF prepolymer was the greatest, followed by that of target density and resin content. The values of MDF fabricated with RSF-based adhesive resins exceeded those with urea-formaldehyde resins, which is mostly used as a resin in the manufacture of MDF. Based on the results of MDF per experimental factors, the optimal conditions were determined to target density of 0.7 g/cm3, resin content of 5% and PF-prepolymer weight ratio of 40 wt% in RSF-based adhesive resin, and physical properties and formaldehyde emission of the MDF fabricated with the conditions satisfied the requirements for MDF and E0 grade, which was designated by National Institute of Forest Science, except for thickness swelling. In conclusion, the potential of RSF-based adhesive for the production of MDF could identify on the basis of the results of this study. However, the stable securement of RSF through the development of bio-refinery process for rape plant is required to commercialize RSF-based adhesive resins for MDF production.

본 연구는 착유 부산물인 유채박을 이용하여 조제한 접착제를 다양한 조건으로 중밀도섬유판(MDF) 제조에 적용한 후, 물성 및 포름알데히드 방출량의 평가를 통하여 최적 제조조건의 도출 및 이에 대한 상용화 가능성을 확인하기 위하여 수행하였다. 접착제는 선행연구 결과를 토대로 유채박의 알칼리/산 가수분해물과 phenol-formaldehyde(PF) prepolymer를 이용하여 조제하였다. PF prepolymer 함량(20, 30, 40 wt%)을 조절한 유채박-기반 접착제를 각 함지율(5, 7, 9%) 및 목표 밀도(0.5, 0.7 g/cm3)에 따라 MDF 제조에 적용하였다. 이 조건에서 제조한 MDF의 물성을 측정한 결과, 접착제 내의 PF prepolymer 함량이 미치는 영향이 가장 컸으며, 다음으로 밀도, 함지율 순으로 분석되었다. 이 측정치는 현재 MDF 생산에 사용되고 있는 요소수지 접착제를 적용하여 제조한 MDF의 휨강도, 박리강도, 흡수두께 팽창율, 포름알데히드 방출량보다 우수하였다. 실험인자별 MDF의 물성 및 포름알데히드 방산량 결과를 토대로 최적제조조건은 0.7 g/cm3의 목표밀도, 5%의 함지율, 접착제 내의 40 wt% PF prepolymer 함량으로 조사되었으며, 흡수두께 팽창율을 제외하고 국립산림과학원의 중밀도섬유판 및 E0급 포름알데히드 방출량 기준을 모두 만족하는 것으로 조사되었다. 결과를 종합하면, 유채박-기반 접착제를 이용한 MDF 생산의 상용화 가능성을 확인하였으나, 유채에 대한 바이오리파이너리 공정 적용을 통하여 접착제 제조용 주원료인 유채박을 저렴하게 안정적으로 확보하는 방안의 확립이 선행되어야 할 것으로 생각한다.

Keywords

Acknowledgement

본 논문은 2020년도 대구대학교 학술연구비 지원에 의하여 수행한 결과를 토대로 작성하였다. 한편 중밀도섬유판의 제조 및 물성평가를 위하여 긴 시간 수고한 대구대학교 산림자원학과 학생들에게도 감사드립니다.

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