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

한국펄프종이공학회 (Korea Technical Association of the Pulp and Paper Industry)
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LbL 다층흡착에 의한 나노피브릴화 셀룰로오스의 표면 개질과 현탁액의 탈수성에 미치는 영향

Surface Modification of Nanofibrillated Cellulose by LbL (Layer-by-Layer) Multilayering and its Effect on the Dewatering Ability of Suspension

  • 심규정 (서울대학교 농업생명과학대학 산림과학부) ;
  • 윤혜정 (서울대학교 농업생명과학대학 산림과학부) ;
  • 안정언 (서울대학교 농업생명과학대학 산림과학부) ;
  • 이제곤 (서울대학교 농업생명과학대학 산림과학부) ;
  • 이혜윤 (서울대학교 농업생명과학대학 산림과학부) ;
  • 조연희 (서울대학교 농업생명과학대학 산림과학부)
  • Sim, Kyujeong (Dept. of Forest Sciences, Seoul National University) ;
  • Youn, Hye Jung (Dept. of Forest Sciences, Seoul National University) ;
  • Ahn, Jungeon (Dept. of Forest Sciences, Seoul National University) ;
  • Lee, Jegon (Dept. of Forest Sciences, Seoul National University) ;
  • Lee, Hyeyoon (Dept. of Forest Sciences, Seoul National University) ;
  • Jo, Yeonhee (Dept. of Forest Sciences, Seoul National University)
  • 투고 : 2014.02.07
  • 심사 : 2014.02.18
  • 발행 : 2014.02.28
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초록

In this study, we modified the surface of nanofibrillated cellulose (NFC) through LbL (Layer-by-Layer) multilayering process with polyelectrolytes and investigated the effects of the NFC modification on the charge of NFC surface and the dewatering ability of NFC suspension. The multilayering process was done onto NFC fibers using polydiallyldimethylammonium chloride (PDADMAC) and poly-sodium 4-styrene sulfonate (PSS) under different dosage and washing conditions. When the washing was carried out in every adsorption stage, the modified NFC had strong cationic or anionic charge depending on the type of polyelectrolyte in the outermost layer and the dewatering ability was not affected. In the case of no washing treatment or washing in the final adsorption stage, however, the zeta potential of NFC was close to an isoelectric point so that the dewatering ability increased remarkably. Low addition level of polyelectrolytes also showed the similar results. The mixing of NFC suspensions with opposite charge resulted in higher network strength and improved dewatering ability due to the flocculation.

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참고문헌

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피인용 문헌

  1. Evaluation of Dewatering of Cellulose Nanofibrils Suspension and Effect of Cationic Polyelectrolyte Addition on Dewatering vol.46, pp.6, 2014, https://doi.org/10.7584/ktappi.2014.46.6.078