TEMPERATURE-INDUCED HETEROFLOCCULATION IN PARTICULATE COLLOIDAL DISPERSIONS

Authors
ISLAM AM CHOWDHRY BZ SNOWDEN MJ
Citation
Am. Islam et al., TEMPERATURE-INDUCED HETEROFLOCCULATION IN PARTICULATE COLLOIDAL DISPERSIONS, Journal of physical chemistry, 99(39), 1995, pp. 14205-14206
Citations number
9
Categorie Soggetti
Chemistry Physical
Journal title
Journal of physical chemistry → ACNP
ISSN journal
00223654
Volume
99
Issue
39
Year of publication
1995
Pages
14205 - 14206
Database
ISI
SICI code
0022-3654(1995)99:39<14205:THIPCD>2.0.ZU;2-A
Abstract
Mixed dispersions of anionic polystyrene latex and cationic microgels of poly(N-isopropylacrylamide) coexist as colloidally stable mixed dis persions at 20 degrees C. However, at elevated temperatures (50 degree s C) a heteroflocculation of the dispersion takes place within certain concentration ranges of microgel particles. The system redisperses on cooling, but only at elevated pH values.