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Effect of temperature and pH values on aggregation behavior of polymeric surfactants in aqueous solution
Author(s) -
Cao Ya,
Li Huilin
Publication year - 2005
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.21613
Subject(s) - micelle , aqueous solution , dispersity , carboxymethyl cellulose , ethylene oxide , dynamic light scattering , pulmonary surfactant , chemical engineering , polymer chemistry , materials science , aggregation number , acrylate , ether , polymer , chemistry , critical micelle concentration , copolymer , organic chemistry , nanoparticle , sodium , nanotechnology , engineering
Abstract A novel kind of polymeric surfactant based on carboxymethyl cellulose and poly(ethylene oxide) dodecyl ether acrylate (CMC‐AR 12 EO 9 ) was synthesized through ultrasonic irradiation. Aggregation behavior in aqueous solution at different temperatures and pH values was investigated by dynamic laser scattering and fluorescence probe. The results show that, with the increase of temperature, polymeric surfactants are favorable to form multimolecular micelles with narrower polydispersity of size distribution. At a higher temperature, the multimolecular micelles tend to aggregate bigger sized particles that are unstable and would be disaggregated at higher shear rate. At the elevated pH values, the size of micelles reduces drastically because of strong damage of alkali to aggregates, whereas nonpolar and insoluble domains formed by the hydrophobic blocks of polymeric surfactants are insensitive to pH changes. © 2005 Wiley Periodicals, Inc. J Appl Polym Sci 98: 945–949, 2005