Roll-to-roll fabrication of cellulose nanocrystal-poly(vinyl alcohol) composite coatings with controlled anisotropy

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dc.contributor.authorChowdhury, R.A.
dc.contributor.authorClarkson, C.
dc.contributor.authorApalangya, V.A.
dc.contributor.authorIslam, S.M.N.
dc.contributor.authorYoungblood, J.P.
dc.date.accessioned2019-06-19T10:57:08Z
dc.date.available2019-06-19T10:57:08Z
dc.date.issued2018-11
dc.description.abstractCellulose nanocrystal (CNC) composite coatings may impart many benefits in packaging, electronic, optical, etc. applications, however, large-scale cellulose coating production is a major engineering challenge. A versatile roll-to-roll reverse gravure process for the manufacture of cellulose nanocrystal-poly(vinyl alcohol) (CNC–PVA) coatings on a flexible polymer substrate was investigated in the present work. CNC content was varied from 0 to 100% to determine the effect of CNC concentration on coating anisotropy. Coatings were characterized by polarized light microscopy, UV–Vis spectrophotometry, cross-hatch adhesion testing and optical profilometry. This method produced uniform, highly transparent coatings with surface roughness less than 100 nm for all CNC–PVA weight ratios examined. The isotropic-anisotropic coating transformation was observed above 50% CNC, with a maximum anisotropy at 70% CNC along the shear direction. Anisotropic CNC–PVA coatings exhibited increased water vapor barrier performance due to the increased CNC packing and density.en_US
dc.identifier.citationChowdhury, R.A., Clarkson, C., Apalangya, V.A. et al. Cellulose (2018) 25: 6547. https://doi.org/10.1007/s10570-018-2019-5en_US
dc.identifier.otherVolume 25, Issue 11, pp 6547–6560
dc.identifier.otherhttps://doi.org/10.1007/s10570-018-2019-5
dc.identifier.urihttp://ugspace.ug.edu.gh/handle/123456789/30968
dc.language.isoenen_US
dc.publisherCelluloseen_US
dc.subjectAnisotropyen_US
dc.subjectCellulose nanocrystalsen_US
dc.subjectPoly(vinyl alcohol)en_US
dc.subjectRoll-to-rollen_US
dc.subjectTransparencyen_US
dc.titleRoll-to-roll fabrication of cellulose nanocrystal-poly(vinyl alcohol) composite coatings with controlled anisotropyen_US
dc.typeArticleen_US

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