양이온성 셀룰로오스 나노피브릴을 이용한 배리어 코팅에 대한 기초연구

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. KCI Citation Count: 1