Effect of Polyelectrolyte-Cationized Cellulose Nanofibril on the Properties of Paper

Jae Young Lee; Hae Min Jo; Yeon Hui Lee; Ji Young Lee

doi:10.7584/JKTAPPI.2021.06.53.3.49

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2021 Vol.53, Issue 3 Preview Page

Effect of Polyelectrolyte-Cationized Cellulose Nanofibril on the Properties of Paper 고분자전해질에 의해 양이온화된 셀룰로오스 나노섬유가 종이 물성에 미치는 영향

30 June 2021. pp. 49-56

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Abstract

In this study, the effect of a cationic cellulose nanofibril (CNF), produced by combining surface-modification using cationic polyelectrolyte and micro-grinding, on the strength of paper, was evaluated. Hardwood bleached kraft pulp (HwBKP) was pretreated with poly-DADMAC, and then a method of previous study was conducted, followed by microgrinding. Afterward, the zeta-potential and fiber width of the untreated and cationic CNFs were measured. The handsheets were produced by adding the untreated and cationic CNFs into the furnish that was prepared with HwBKP and softwood BKP (SwBKP), after which their physical properties were evaluated. The drainage rate and chemical oxygen demand (COD) of the furnish were analyzed based on the addition of CNFs to identify the effect of cationic CNF on the drainage and retention at the wet-end part.

Further, the zeta-potential of the cationic CNF surface-modified with poly-DADMAC exhibited a positive value, but no significant difference was noted in the fiber widths based on the surface-modification. The cationic CNF exhibited higher tensile and burst indexes, and folding endurance because of higher retention at the wet-end part and higher fiber bonds than that in the untreated CNF. However, the cationic CNF did not show the difference in the ISO brightness and opacity of the paper, and the drainage rate of the furnish from untreated CNF. Thus, it was concluded that the cationic CNF, produced via surface-modification using poly-DADMAC and micro-grinding, was more effective in improving the strength of the paper regarding the similar optical properties of the paper, as well as the drainage rate of the furnish, compared with untreated CNF.

Keywords

Cellulose nanofibril (CNF)

surface-modification

cationic polyelectrolyte

poly-DADMAC

paper strength

References

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Information

Publisher :Korea Technical Association of The Pulp and Paper Industry
Publisher(Ko) :한국펄프종이공학회
Journal Title :Journal of Korea TAPPI
Journal Title(Ko) :펄프종이기술
Volume : 53
No :3
Pages :49-56
Received Date : 2021-05-10
Revised Date : 2021-06-14
Accepted Date : 2021-06-16
DOI :https://doi.org/10.7584/JKTAPPI.2021.06.53.3.49

Journal of Korea TAPPI ISSN:0253-3200(Print) 펄프종이기술

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Literature Cited