Superhydrophobic paper coating containing nonconventional clay
2010 (English)In: TAPPI Journal, ISSN 0734-1415, Vol. 9, no 11, 33-40 p.Article in journal (Refereed) PublishedText
Hydrophobic clay fillers have not been widely used in dispersion coatings for linerboard because of the difficulty of dispersing them in water. This work investigated whether hydrophobic clay can be used as filler in barrier dispersion coatings. Hydrophobic clay was compared with conventional clay in terms of coating consolidation, structure, wetting, and barrier performance. All coatings were applied to linerboard sheets made using a laboratory dynamic sheet former. The coated linerboards were examined using scanning electron microscopy and Raman spectroscopy, and were characterized with respect to water absorption, vapor transmission rate, and contact angles. The results show that a coating containing hydrophobic clay provides a superhydrophobic character to paper; i.e., a high water contact angle (150 degrees) and relatively low water absorption. Raman mapping of cross-sections revealed that the latex distribution is uniform in the presence of either conventional clay or hydrophobic clay, and that the distribution of hydrophobic clay tends to be more uniform than conventional clay, which might reflect good mixing and consolidation of hydrophobic clay.
Place, publisher, year, edition, pages
TAPPI Press, 2010. Vol. 9, no 11, 33-40 p.
Research subject Chemical Engineering
IdentifiersURN: urn:nbn:se:kau:diva-40477ISI: 000285249700004OAI: oai:DiVA.org:kau-40477DiVA: diva2:905349
11th Advanced Coating Fundamentals Symposium Proceedings: The Latest Advances in Coating Research and Development, October 11-13, 2010 , Munich