Fundamental Study on Barrier Coating of Paper Using Cationic Cellulose Nanofibrils

Ji Young Lee; Su Ho Kim; Hae Min Jo; Yeon Hui Lee; Chul Hwan Kim

doi:10.7584/JKTAPPI.2020.06.52.3.90

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Fundamental Study on Barrier Coating of Paper Using Cationic Cellulose Nanofibrils 양이온성 셀룰로오스 나노피브릴을 이용한 배리어 코팅에 대한 기초연구

30 June 2020. pp. 90-98

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Abstract

In this study, never-sized base paper was used to investigate layer-by-layer multilayered barrier coating with cationic and anionic cellulose nanofibrils (CNFs). The cationic and anionic CNFs were both prepared by isolating hardwood bleached kraft pulp (HwBKP) using a microgrinder. Surface modification of the HwBKP with polydiallyldimethylammonium chloride (Poly-DADMAC) was undertaken to create cationic CNFs before microgrinding. The barrier coating was applied with a rod coater, and the coating weight and air permeability of the barrier-coated paper were measured. Coverage by the CNFs was evaluated via scanning-electron-microscope images of the barrier-coated paper. As the pass number of micro-grinding increased, the air permeability of the paper barrier-coated with cationic and anionic CNFs increased. As the number of coating layers increased, the coating weight increased, and coverage of the barrier-coated paper improved. The coating weight and air permeability of the paper barrier-coated with both cationic and anionic CNFs exhibited higher values than those of paper barrier-coated with only anionic CNFs for the same number of coating layers. Consequently, high air permeability and high coverage of paper are possible if both cationic and anionic CNFs are utilized as barrier coatings.

Keywords

Cellulose nanofibril (CNF)

cationic CNF

barrier coating

coat weight

air permeability

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 : 52
No :3
Pages :90-98
Received Date : 2020-05-18
Revised Date : 2020-06-08
Accepted Date : 2020-06-10
DOI :https://doi.org/10.7584/JKTAPPI.2020.06.52.3.90

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

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