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Tailoring the chemistry of polyelectrolytes to control their adsorption on cellulosic surfaces
KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology.
KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology.ORCID iD: 0000-0001-8622-0386
Eka Chemicals AB.
VTC Elastoteknik AB.
2009 (English)In: Colloids and Surfaces A: Physicochemical and Engineering Aspects, ISSN 0927-7757, E-ISSN 1873-4359, Vol. 340, no 1-3, 135-142 p.Article in journal (Refereed) Published
Abstract [en]

The adsorption of two types of cationic polyacrylamides in the presence of a background electrolyte was studied on substrates including silicon oxide, kraft pulp fibres and thin films of regenerated cellulose. One of the polyelectrolytes was a conventional cationic polyacrylamide (MeCPAM) and the other was a benzyl-containing derivative of cationic polyacrylamide (BzCPAM). It was found that the aromatic substituents of BzCPAM strongly enhanced the adsorption on substrates of hydrophobically modified silicon oxide when a background electrolyte was present. A similar effect was also seen in the case of BzCPAM adsorption on unbleached pulp fibres, but in this case MeCPAM also exhibited a strong adsorption at high background electrolyte concentrations. On bleached pulp fibres, BzCPAM maintained a high adsorption up to a concentration of 100 mM NaCl whereas MeCPAM adsorption showed a significant decrease at this salt concentration. On model cellulose films, the adsorption of BzCPAM was similar to that of MeCPAM and the non-ionic interactions with cellulose appeared weak, since there was no adsorption of either polyelectrolyte in 300 mM NaCl.

Place, publisher, year, edition, pages
2009. Vol. 340, no 1-3, 135-142 p.
Keyword [en]
Cationic polyacrylamide, Hydrophobic modification, Polyelectrolyte adsorption, Non-ionic interactions, Silicon oxide, Pulp fibres, Model cellulose surface
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:kth:diva-14146DOI: 10.1016/j.colsurfa.2009.03.017ISI: 000266227600019Scopus ID: 2-s2.0-64849116930OAI: oai:DiVA.org:kth-14146DiVA: diva2:330774
Note
QC 20100720Available from: 2010-07-20 Created: 2010-07-20 Last updated: 2017-12-12Bibliographically approved
In thesis
1. Dynamic and Equilibrium Properties of Adsorbed Polyelectrolyte Layers
Open this publication in new window or tab >>Dynamic and Equilibrium Properties of Adsorbed Polyelectrolyte Layers
2008 (English)Doctoral thesis, comprehensive summary (Other scientific)
Place, publisher, year, edition, pages
Stockholm: KTH, 2008. 66 p.
Series
Trita-CHE-Report, ISSN 1654-1081 ; 2008:25
Keyword
adsorption; cellulose; conformation; flocculation; kinetics; model surfaces; polyelectrolytes; pulp fibres; Quartz Crystal Microbalance with Dissipation; silicon oxide; Stagnation Point Adsorption Reflectometry
National Category
Paper, Pulp and Fiber Technology
Identifiers
urn:nbn:se:kth:diva-4697 (URN)978-91-7178-938-9 (ISBN)
Public defence
2008-04-25, STFI-salen, STFI-Packforsk, Drottning Kristinas väg 61, Stockholm, 10:00
Opponent
Supervisors
Note
QC 20100720Available from: 2008-04-18 Created: 2008-04-18 Last updated: 2010-07-20Bibliographically approved

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Wågberg, Lars

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