Applied Chemistry for Engineering (공업화학)

The Korean Society of Industrial and Engineering Chemistry (한국공업화학회)
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Value-added Utilization of Lignin Residue from Pretreatment Process of Lignocellulosic Biomass

목질계 바이오매스 전처리 공정에서 발생하는 리그닌 부산물 활용 기술 개발 동향

  • Jung, Jae Yeong (Department of chemical engineering, Kyung Hee University) ;
  • Lee, Yumi (Department of chemical engineering, Kyung Hee University) ;
  • Lee, Eun Yeol (Department of chemical engineering, Kyung Hee University)
  • 정재영 (경희대학교 공과대학 화학공학과) ;
  • 이유미 (경희대학교 공과대학 화학공학과) ;
  • 이은열 (경희대학교 공과대학 화학공학과)
  • Received : 2016.02.17
  • Accepted : 2016.03.18
  • Published : 2016.04.10
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Abstract

Due to the high price volatility and environmental concern of petroleum, biofuels such as bioethanol produced from lignocellulosic biomass have attracted much attention. It is also expected that the amount of lignin residue generated from pretreatment of lignocellulosic biomass will increase as the volume of cellulosic bioethanol increases. Lignin is a natural aromatic polymer and has very complex chemical structures with chemical functional groups. Chemical modification of lignin such as oxypropylation and epoxidation has also been applied to the production of value-added bioplastics such as polyurethane and polyester with enhanced thermal and mechanical properties. In addition, lignin can be used for carbon fiber production in automobile industries. This review highlights recent progresses in utilizations and chemical modifications of lignin for the production of bioplastics, resins, and carbon fiber.

불안정한 원유 가격과 지속적인 환경 문제를 야기하고 있는 석유 자원의 대체를 위한 바이오매스 활용 기술 개발과 상업화가 활발히 진행되고 있다. 목질계 바이오매스 전처리와 펄프 제조 과정에서 다량으로 발생하는 리그닌은 바이오에탄올 제조량의 증가와 더불어 발생량 또한 급속히 증가할 것으로 예상되고 있다. 리그닌은 방향족 고분자로 hydroxyl기와 같은 화학 작용기를 갖고 있어 화학 소재 원료로서의 활용이 가능한 저가 부산물이다. 리그닌의 방향족구조와 작용기를 oxypropylation, epxoidation 등을 이용하여 화학적으로 변환시켜 반응성을 향상시키거나, 새로운 화학작용기를 도입함으로써 바이오폴리우레탄, 바이오폴리에스터, 페놀 수지, 에폭시 수지 등 바이오플라스틱 제조에 활용이 가능하다. 본 총설은 리그닌을 활용하여 제조 가능한 바이오플라스틱, 수지, 탄소섬유 등에 대해 소개하고, 관련 최신 연구 동향 및 리그닌 응용 기술에 관한 전망을 소개하였다.

Keywords

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