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

셀룰로오스 나노피브릴 현탁액의 탈수성 평가 및 양이온성 고분자전해질 투입의 영향

  • 류재호 (한솔제지(주) 기술연구소) ;
  • 심규정 (서울대학교 농업생명과학대학 산림과학부) ;
  • 윤혜정 (서울대학교 농업생명과학대학 산림과학부)
  • Received : 2014.12.10
  • Accepted : 2014.12.23
  • Published : 2014.12.30
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Abstract

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.

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References

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  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