Journal of Korea Technical Association of The Pulp and Paper Industry (펄프종이기술)

Korea Technical Association of the Pulp and Paper Industry (한국펄프종이공학회)
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Characteristics of pre-extracted hemicelluloses from Korean mixed wood by hot water and alkali solution and its effect on handsheet properties

열수 및 알칼리 용액을 이용하여 국산 목재 칩으로부터 선추출한 헤미셀룰로오스의 특성과 이에 따른 수초지 물성 변화

  • Seo, Dong-Il (Dept. of Forest Sciences, Seoul National University) ;
  • Lee, Sang-Hoon (Dept. of Forest Sciences, Seoul National University) ;
  • Sim, Kyu-Jeong (Dept. of Forest Sciences, Seoul National University) ;
  • Lee, Hak-Lae (Dept. of Forest Sciences, Seoul National University) ;
  • Youn, Hye-Jung (Dept. of Forest Sciences, Seoul National University)
  • 서동일 (서울대학교 농업생명과학대학 산림과학부) ;
  • 이상훈 (서울대학교 농업생명과학대학 산림과학부) ;
  • 심규정 (서울대학교 농업생명과학대학 산림과학부) ;
  • 이학래 (서울대학교 농업생명과학대학 산림과학부) ;
  • 윤혜정 (서울대학교 농업생명과학대학 산림과학부)
  • Received : 2011.12.05
  • Accepted : 2011.12.27
  • Published : 2011.12.30
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Abstract

Hemicelluloses pre-extracted from Korean mixed wood chip were investigated as a wet-end additive. Hemicelluloses dissolved in hot water and alkali solution were isolated by ethyl alcohol precipitation from pre-extractives. They showed molecular weight of 9,000 ~ 27,000 g/mol as revealed by size exclusion chromatography. The reduction of molecular weight through hot water extraction was caused by autohydrolysis. Chemical composition of the hemicelluloses were analyzed with high-performance liquid chromatography and UV-Vis spectroscopy. As the surface charge of isolated hemicelluloses were negative, the adsorption of hemicelluloses onto softwood unbleached kraft pulp fiber was promoted by poly-DADMAC. The physical properties of handsheets increased as the molecular weight of hemicellulose increased. On the other hands, the optical property decreased with hemicellulose adsorption.

Keywords

References

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