Roll-to-roll fabrication of cellulose nanocrystal-poly(vinyl alcohol) composite coatings with controlled anisotropy
dc.contributor.author | Chowdhury, R.A. | |
dc.contributor.author | Clarkson, C. | |
dc.contributor.author | Apalangya, V.A. | |
dc.contributor.author | Islam, S.M.N. | |
dc.contributor.author | Youngblood, J.P. | |
dc.date.accessioned | 2019-06-19T10:57:08Z | |
dc.date.available | 2019-06-19T10:57:08Z | |
dc.date.issued | 2018-11 | |
dc.description.abstract | Cellulose 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.citation | Chowdhury, R.A., Clarkson, C., Apalangya, V.A. et al. Cellulose (2018) 25: 6547. https://doi.org/10.1007/s10570-018-2019-5 | en_US |
dc.identifier.other | Volume 25, Issue 11, pp 6547–6560 | |
dc.identifier.other | https://doi.org/10.1007/s10570-018-2019-5 | |
dc.identifier.uri | http://ugspace.ug.edu.gh/handle/123456789/30968 | |
dc.language.iso | en | en_US |
dc.publisher | Cellulose | en_US |
dc.subject | Anisotropy | en_US |
dc.subject | Cellulose nanocrystals | en_US |
dc.subject | Poly(vinyl alcohol) | en_US |
dc.subject | Roll-to-roll | en_US |
dc.subject | Transparency | en_US |
dc.title | Roll-to-roll fabrication of cellulose nanocrystal-poly(vinyl alcohol) composite coatings with controlled anisotropy | en_US |
dc.type | Article | en_US |
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