Journal of the Korean Wood Science and Technology

The Korean Society of Wood Science & Technology (한국목재공학회)
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Delignification Effect on Properties of Lignocellulose Nanofibers from Korean White Pine and Their Nanopapers

잣나무 유래 리그노셀룰로오스 나노섬유 및 나노종이 특성에 미치는 탈리그닌의 영향

  • Jang, Jae-Hyuk (College of Forest & Environmental Sciences, Kangwon National University) ;
  • Lee, Seung-Hwan (College of Forest & Environmental Sciences, Kangwon National University) ;
  • Kim, Nam-Hun (College of Forest & Environmental Sciences, Kangwon National University)
  • 장재혁 (강원대학교 산림환경과학대학) ;
  • 이승환 (강원대학교 산림환경과학대학) ;
  • 김남훈 (강원대학교 산림환경과학대학)
  • Received : 2014.08.11
  • Accepted : 2014.09.11
  • Published : 2015.01.25
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Abstract

This study was carried out to investigate the effect of delignification on properties of lignocellulose nanofibers (LCNFs) prepared by wet disk-milling (WDM) after steam and ozone oxidation pre-treatments and their nanopaper sheets. Delignification treatment was effective to obtain fine morphology with uniform fiber diameter less than 35 nm without aggregation, and increased the specific surface area (SSA) and filtration time of LCNFs. In particular, SSA and filtration time of the LCNFs prepared by WDM after ozone pretreatment increased 1.5 and 5.4 times after further delignification. Delignification also increased whiteness and decreased the redness of nanopaper sheets. The highest color difference (41.9) before and after the delignification was obtained in LCNFs prepared by WDM after the steam pretreatment. Tensile properties of nanopaper sheets were also increased by further delignification. The highest tensile strength was found to be 142 MPa.

본 연구에서는 고온증기 및 오존 전처리로 제조된 리그노셀룰로오스 나노섬유의 탈리그닌 처리가 나노섬유 및 나노종이의 특성에 미치는 영향을 평가하였다. 형태학적 특성 관찰 결과, 탈리그닌 처리에 의해 평균 직경 35 nm 이하의 균일한 섬유가 얻어졌다. 또한 탈리그닌 처리는 리그노셀룰로오스 나노섬유의 비표면적을 크게 향상시켰으며, 특히 오존 전처리의 경우는 탈리그닌 처리에 의해 무처리에 비하여 1.5배 증가하였다. 나노종이 제조 과정 중의 여수시간 또한 탈리그닌 처리에 의해 크게 증가하여, 고온증기 전처리의 경우는 탈리그닌 처리에 의해 무처리와 비교하여 5.4배 증가하였다. 탈리그닌 처리는 나노종이의 백색도를 향상시켰으며, 고온증기 전처리의 경우는 탈리그닌 전과 비교하여 색상차가 41.9로 매우 높게 나타났다. 나노종이의 인장강도, 탄성율 및 신장율도 탈리그닌에 의하여 크게 향상되었으며, 고온증기 전처리 후의 탈리그닌에 의한 나노종이의 인장강도가 142 MPa로 가장 높게 나타났다.

Keywords

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