A large-scale manufacturing process, roll to roll micro-gravure printing, for cellulose nanocrystal (CNC) based coatings on a flexible substrate has been described in this work. Different processing parameters such as gravure speed, substrate speed, and ink viscosity were investigated for the liquid transfer mechanism that control the final coating thickness. After successful fabrication, the coating adhesion strength was determined with a cross-hatch adhesion test that was correlated with the coating thickness.  The coating transparency and surface roughness were characterized using UV-Visible spectrometer and atomic force microscopy. The effect of gravure rotation was correlated with the shear rate of the ink system that extensively determined the crystalline domain arrangement in the CNC coating. Finally, the gas barrier performance was explored for anisotropic CNC coating and compared for different engineering polymers.<br/>

Roll-to-roll fabrication of anisotropic cellulose nanocrystal coatings for packaging application

256th National Meeting (2018)

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