Probing polymeric stabilization in nonaqueous media by direct measurements
2000 (English)In: Journal of The American Ceramic Society, ISSN 0002-7820, E-ISSN 1551-2916, Vol. 83, no 1, 217-219 p.Article in journal (Refereed) Published
The steric repulsion induced by adsorbed layers of the commercial dispersant Hypermer KD3 has been probed by direct measurements in decalin. The forces are long range (commencing at 30-40 nm) and repulsive, and the distance dependence can be modeled with a simple scaling theory expression valid for polymer brushes. We obtain layer thicknesses of similar to 9-15 nm for the compressed layers, depending on KD3 concentration, whereas the undisturbed layers have a thickness of similar to 23-24 nm, independent of polymer concentration. Comparison of the measured interaction lengths with previous layer thickness estimates based on rheological studies shows that the polymer layers are compressed in dense suspensions.
Place, publisher, year, edition, pages
2000. Vol. 83, no 1, 217-219 p.
rheological properties, suspensions, consolidation, interface, surfaces, solvent
IdentifiersURN: urn:nbn:se:kth:diva-19605ISI: 000085764000033OAI: oai:DiVA.org:kth-19605DiVA: diva2:338297
QC 20100525 NR 201408042010-08-102010-08-102012-02-10Bibliographically approved