Tailoring the chemistry of polyelectrolytes to control their adsorption on cellulosic surfaces
2009 (English)In: Colloids and Surfaces A: Physicochemical and Engineering Aspects, ISSN 0927-7757, Vol. 340, no 1-3, 135-142 p.Article in journal (Refereed) Published
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.
Cationic polyacrylamide, Hydrophobic modification, Polyelectrolyte adsorption, Non-ionic interactions, Silicon oxide, Pulp fibres, Model cellulose surface
Engineering and Technology
IdentifiersURN: urn:nbn:se:kth:diva-14146DOI: 10.1016/j.colsurfa.2009.03.017ISI: 000266227600019ScopusID: 2-s2.0-64849116930OAI: oai:DiVA.org:kth-14146DiVA: diva2:330774
QC 201007202010-07-202010-07-202010-07-20Bibliographically approved