Journal of the Korean Wood Science and Technology

The Korean Society of Wood Science & Technology (한국목재공학회)
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Size Fractionation of Cellulose Nanofibers by Settling Method and Their Morphology

셀룰로오스 나노섬유의 중력침강법에 의한 치수분획 및 형태학적 성질

  • Park, Chan-Woo (Division of Forest Materials Science & Engineering, College of Forest and Environmental Sciences, Kangwon National University) ;
  • Han, Song-Yi (Division of Forest Materials Science & Engineering, College of Forest and Environmental Sciences, Kangwon National University) ;
  • Lee, Seung-Hwan (Division of Forest Materials Science & Engineering, College of Forest and Environmental Sciences, Kangwon National University)
  • 박찬우 (강원대학교 산림환경과학대학 산림바이오소재공학과) ;
  • 한송이 (강원대학교 산림환경과학대학 산림바이오소재공학과) ;
  • 이승환 (강원대학교 산림환경과학대학 산림바이오소재공학과)
  • Received : 2016.03.17
  • Accepted : 2016.04.23
  • Published : 2016.05.25
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Abstract

The cellulose nanofibers (CNFs) were prepared by wet disk-milling (WDM) and fractionated by settling method into supernatant, middle and sediment fractions. The diameter and its distribution of the fractionated CNFs were investigated. With increasing WDM passing number, precipitation became delayed. Weight fraction at sediment fraction was decreased, whereas those at supernatant and middle fractions were increased with increasing WDM passing number. Diameter distribution of CNFs at supernatant fraction was narrowest and became broaden at middle and sediment fraction. Filtration time was longer in order of supernatant, middle and sediment fraction.

본 연구에서는 셀룰로오스 CNF의 치수별 분획 가능성 및 그 효율성을 평가하기 위하여, 기계적 해섬처리로 얻어진 CNF 수현탁액을 중력침강시켜 치수별 CNF를 분획하고 형태학적 성질 및 치수분포를 조사하였다. 침강속도는 해섬처리 횟수가 증가할수록 늦었으며, 침강 높이 또한 작았다. 침전층의 분획수율은 해섬처리 횟수가 증가하면서 감소하였으며, 중간층 및 상등액층은 증가하였다. 상등액 CNF의 직경 분포폭이 가장 좁았으며, 중간층 및 침전층으로 분포폭이 넓어졌다. 또한, 해섬처리 횟수가 증가할수록 직경 및 분포폭이 감소하였다. 여수시간은 상등액층, 중간층, 침전층 순서로 길게 나타났다.

Keywords

References

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