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Application of polymeric multilayers of starch onto wood fibres to enhance strength properties of paper
Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences. (FSCN – Fibre Science and Communication Network)
2005 (English)In: Nordic Pulp & Paper Research Journal, ISSN 0283-2631, E-ISSN 2000-0669, Vol. 20, no 3, p. 270-275Article in journal (Refereed) Published
Abstract [en]

Polyelectrolyte multilayers of cationic and anionic starch have been used to enhance the strength properties of paper. All starches used in this investigation had a degree of substitution around 0.065. Optical reflectometry showed that a combination of cationic and anionic starch could form polyelectrolyte multilayers onto silicon oxide surfaces. The same combination of starches was then applied to unbeaten, bleached softwood kraft fibres to form three layers, i.e. a cationic/anionic/cationic starch combination. The results showed a significant increase in the paper strength properties in terms of tensile index, strain at break, and Scott Bond. The adsorbed amount of starch in the sheets, determined using an enzymatic method, was found to increase with each successive starch treatment. The increased paper strength was not only due to the increase in adsorbed amount of starch; rather, the chemical composition of the starch was also important. Cationic starch with high amylose content had a more positive effect on the paper strength properties. Furthermore, it was observed that anionic starch, despite being adsorbed in large amounts, did not contribute to the increase in tensile strength or strain at break to the same extent as did cationic starch. However, the out-of-plane properties, measured as Scott Bond properties, increased with the adsorbed amount, regardless of the chemical composition of the starch used in the outermost layer.

Place, publisher, year, edition, pages
2005. Vol. 20, no 3, p. 270-275
Keywords [en]
polyelectrolyte, multilayer, adsorption, optical, starch, paper strength
National Category
Paper, Pulp and Fiber Technology
Identifiers
URN: urn:nbn:se:miun:diva-3389DOI: 10.3183/NPPRJ-2005-20-03-p270-276ISI: 000235257900002Local ID: 3388OAI: oai:DiVA.org:miun-3389DiVA, id: diva2:28421
Available from: 2008-09-30 Created: 2008-09-30 Last updated: 2017-12-12Bibliographically approved
In thesis
1. Influence of Polymeric Multilayer Treatment on Out-of Plane Properties of CTMP-Based Paperboard
Open this publication in new window or tab >>Influence of Polymeric Multilayer Treatment on Out-of Plane Properties of CTMP-Based Paperboard
2007 (English)Doctoral thesis, comprehensive summary (Other academic)
Place, publisher, year, edition, pages
Sundsvall: Mittuniversitetet, 2007
Series
Mid Sweden University doctoral thesis, ISSN 1652-893X ; 40
Keywords
CTMP, Bulk, Multilayer, Polymre adsorption, Scott-Bond, Tensile strength, anionic starch, paperboard, cationic starch, CMC, sack paper, Stagnation Point Adsorption Reflectometry
National Category
Chemical Engineering
Identifiers
urn:nbn:se:miun:diva-8897 (URN)978-91-85317-78-3 (ISBN)
Public defence
(English)
Available from: 2009-05-06 Created: 2009-05-06 Last updated: 2009-07-16Bibliographically approved

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Pettersson, Gunilla

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