Surface forces arising from adsorbed ionic copolymers with hydrophobic and hydrophilic segments in colloidal dispersions

Y. K. Leong, B. C. Ong, J. H. Tan, A. V.M. Chandramalar, Y. Y. Lim

Research output: Contribution to journalArticleResearchpeer-review

6 Citations (Scopus)


The effects of ZrO2 copolymers on surface forces was explored. At low hydrophobic ionic copolymer concentrations, a much greater reduction in the maximum yield stress was observed as compared with the more hydrophilic polyacrylic acid and this was because of a thicker steric layer formed on the interacting particle. At high hydrophobic ionic copolymer concentrations, hydrophobic effects become important. These effects caused the maximum yield stress to increase as a result of an overall increase in entropy when the interacting particles are flocculated than when they are far apart.

Original languageEnglish
Pages (from-to)59-69
Number of pages11
JournalJournal of Rheology
Issue number1
Publication statusPublished - Jan 2003

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