Journal of Radiation Industry (방사선산업학회지)

Korean Society of Radiation Industry (한국방사선산업학회)
권호 표지

Effect of Gamma Ray on Molecular Structures of Alkali-Lignin

감마선이 알칼리 리그닌의 분자구조에 미치는 영향

  • Kim, Du Yeong (Radiation Research Division for Industry and Environment, Korea Atomic Energy Research Institute) ;
  • Jeun, Joon Pyo (Radiation Research Division for Industry and Environment, Korea Atomic Energy Research Institute) ;
  • Shin, Hye Kyoung (Radiation Research Division for Industry and Environment, Korea Atomic Energy Research Institute) ;
  • Kang, Phil Hyun (Radiation Research Division for Industry and Environment, Korea Atomic Energy Research Institute)
  • 김두영 (한국원자력연구원 방사선공업환경연구부) ;
  • 전준표 (한국원자력연구원 방사선공업환경연구부) ;
  • 신혜경 (한국원자력연구원 방사선공업환경연구부) ;
  • 강필현 (한국원자력연구원 방사선공업환경연구부)
  • Received : 2011.08.26
  • Accepted : 2011.09.09
  • Published : 2011.09.30

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Abstract

Lignin is one of the natural macromolecules. Every year large amount of lignin arises from the cellulose production as a by-product worldwide. The use of lignin as a precursor to carbonaceous materials has gained interest due to its low cost and high availability. Therefore, we improved the properties of alkali-lignin by exposing to gamma ray in this study. The alkali-lignin is irradiated by Gamma ray irradiation with varying doses. The char yields of alkali-lignin were investigated by increasing up to 50 kGy. The cross-linking and bond scission of alkali-lignin occur simultaneously during gamma ray irradiation. The crosslinking was predominantly accelerated by gamma ray irradiation up to 50 kGy. Bond scission predominantly occurs between 50 and 500 kGy. ESCA analysis indicated that the alcoholic carbon increase up to 50 kGy. Solution viscosity was increased as absorbed dose increased up to 20 kGy. In addition, the aromatic ring was not influenced by irradiation at doses ranging from 20 to 500 kGy as shown in FT-IR results.

Keywords

Acknowledgement

Supported by : 교육과학기술부