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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셀룰로오스 나노피브릴 현탁액의 탈수성 평가 및 양이온성 고분자전해질 투입의 영향

Evaluation of Dewatering of Cellulose Nanofibrils Suspension and Effect of Cationic Polyelectrolyte Addition on Dewatering

  • 류재호 (한솔제지(주) 기술연구소) ;
  • 심규정 (서울대학교 농업생명과학대학 산림과학부) ;
  • 윤혜정 (서울대학교 농업생명과학대학 산림과학부)
  • 투고 : 2014.12.10
  • 심사 : 2014.12.23
  • 발행 : 2014.12.30
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초록

Since cellulose nanofibrils (CNF) has large specific surface area and high water holding capacity, it is very difficult task to remove water from the CNF suspension. However, dewatering of CNF suspension is a prerequisite of following processes such as mat forming and drying for the application of CNF. In this study, we evaluated the drainage of cellulose fibers suspension under vacuum and pressure conditions depending on the number of grinding passes. Also, the effect of the addition of cationic polyelectrolyte on dewatering ability of CNF suspension was investigated. Regardless of dewatering condition, the total drained water amount as well as the drainage rate were decreased with an increase in the number of grinding passes. Pressure dewatering equipment enables us to prepare wet CNF mat with relatively higher grammage. The cationic polyelectrolytes improved the dewatering ability of CNF suspension by controlling the zeta potential of CNF. The fast drainage was obtained when CNF suspension had around neutral zeta potential.

키워드

참고문헌

  1. Xhanari, K., Syverud, K., Chinga-Carrasco, G., Paso, K., and Stenius, P., Reduction of water wettability of nanofibrillated cellulose by adsorption of cationic surfactants, Cellulose 18:257-270 (2011). https://doi.org/10.1007/s10570-010-9482-y
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  6. Sim, K., Ryu, J., and Youn, H. J., Effect of the number of passes through grinder on the pore characteristics of nanofibrillated cellulose mat, Journal of Korea TAPPI 45(1):35-41 (2013). https://doi.org/10.7584/ktappi.2013.45.1.035
  7. Bhardwaj, N. K., Kumar S., and Bajpai, P. K., Effect of zeta potential on retention and drainage of secondary fibres, Colloids and Surfaces A: Physicochemical and Engineering Aspects 260:245-250 (2005). https://doi.org/10.1016/j.colsurfa.2005.03.011
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피인용 문헌

  1. Production of 100% Cellulose Nanofibril Objects Using the Molded Cellulose Process: A Feasibility Study vol.59, pp.16, 2014, https://doi.org/10.1021/acs.iecr.9b06127