Roll-to-roll fabrication of cellulose nanocrystal-poly(vinyl alcohol) composite coatings with controlled anisotropy
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 nanocrys...
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| Veröffentlicht in: | Cellulose (London) 2018-11, Vol.25 (11), p.6547-6560 |
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| creator | Chowdhury, Reaz A. Clarkson, Caitlyn Apalangya, Vitus A. Islam, S. M. Naeemul Youngblood, Jeffrey P. |
| description | 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. |
| doi_str_mv | 10.1007/s10570-018-2019-5 |
| format | Article |
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M. Naeemul ; Youngblood, Jeffrey P.</creator><creatorcontrib>Chowdhury, Reaz A. ; Clarkson, Caitlyn ; Apalangya, Vitus A. ; Islam, S. M. Naeemul ; Youngblood, Jeffrey P.</creatorcontrib><description>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. 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M. Naeemul</creatorcontrib><creatorcontrib>Youngblood, Jeffrey P.</creatorcontrib><title>Roll-to-roll fabrication of cellulose nanocrystal-poly(vinyl alcohol) composite coatings with controlled anisotropy</title><title>Cellulose (London)</title><addtitle>Cellulose</addtitle><description>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.</description><subject>Adhesion tests</subject><subject>Alcohol</subject><subject>Anisotropy</subject><subject>Bioorganic Chemistry</subject><subject>Cellulose</subject><subject>Ceramics</subject><subject>Chemistry</subject><subject>Chemistry and Materials Science</subject><subject>Coating effects</subject><subject>Coatings</subject><subject>Composites</subject><subject>Electronic packaging</subject><subject>Glass</subject><subject>Gravure</subject><subject>Nanocrystals</subject><subject>Natural Materials</subject><subject>Organic Chemistry</subject><subject>Original Paper</subject><subject>Physical Chemistry</subject><subject>Polarized light</subject><subject>Polymer Sciences</subject><subject>Polyvinyl alcohol</subject><subject>Spectrophotometry</subject><subject>Substrates</subject><subject>Surface roughness</subject><subject>Sustainable Development</subject><subject>Water vapor</subject><subject>Weight</subject><issn>0969-0239</issn><issn>1572-882X</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2018</creationdate><recordtype>article</recordtype><sourceid>AFKRA</sourceid><sourceid>BENPR</sourceid><sourceid>CCPQU</sourceid><sourceid>DWQXO</sourceid><recordid>eNp9kT9LBDEUxIMoeJ5-ALsFGy2iL8llk5Qi_oMDQSzsQjaX6EpM1mRP2W9vjhOstJo38Jt5xSB0TOCcAIiLQoALwEAkpkAU5jtoRrigWEr6vItmoFqFgTK1jw5KeQMAJSiZofKYQsBjwrlq402Xe2vGPsUm-ca6ENYhFddEE5PNUxlNwEMK0-lnH6fQmGDTawpnjU3vQyr96OpV4_GlNF_9-FpdHDfNbtWY2JdUzTAdoj1vQnFHPzpHTzfXT1d3ePlwe391ucSWSTJi3jnR0dXKU6_ACibbTlmjiOIciJG-E66VzK6EBCoceEI5WVjfSiLA2QWbo5Nt7ZDTx9qVUb-ldY71o6aUK8WAtOpfqjYytqALVimypWxOpWTn9ZD7d5MnTUBvBtDbAXQdQG8G0Lxm6DZTKhtfXP5t_jv0DYU5ilM</recordid><startdate>20181101</startdate><enddate>20181101</enddate><creator>Chowdhury, Reaz A.</creator><creator>Clarkson, Caitlyn</creator><creator>Apalangya, Vitus A.</creator><creator>Islam, S. 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M. Naeemul</au><au>Youngblood, Jeffrey P.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Roll-to-roll fabrication of cellulose nanocrystal-poly(vinyl alcohol) composite coatings with controlled anisotropy</atitle><jtitle>Cellulose (London)</jtitle><stitle>Cellulose</stitle><date>2018-11-01</date><risdate>2018</risdate><volume>25</volume><issue>11</issue><spage>6547</spage><epage>6560</epage><pages>6547-6560</pages><issn>0969-0239</issn><eissn>1572-882X</eissn><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. 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| subjects | Adhesion tests Alcohol Anisotropy Bioorganic Chemistry Cellulose Ceramics Chemistry Chemistry and Materials Science Coating effects Coatings Composites Electronic packaging Glass Gravure Nanocrystals Natural Materials Organic Chemistry Original Paper Physical Chemistry Polarized light Polymer Sciences Polyvinyl alcohol Spectrophotometry Substrates Surface roughness Sustainable Development Water vapor Weight |
| title | Roll-to-roll fabrication of cellulose nanocrystal-poly(vinyl alcohol) composite coatings with controlled anisotropy |
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