Please use this identifier to cite or link to this item: https://doi.org/10.1016/j.jcis.2006.10.020
Title: Salt effect on the interactions between gemini surfactant and oppositely charged polyelectrolyte in aqueous solution
Authors: Pi, Y.
Shang, Y.
Liu, H.
Hu, Y.
Jiang, J. 
Keywords: Alkali halide
Gemini surfactant
Interactions
Polyelectrolyte
Salt
Issue Date: 15-Feb-2007
Source: Pi, Y., Shang, Y., Liu, H., Hu, Y., Jiang, J. (2007-02-15). Salt effect on the interactions between gemini surfactant and oppositely charged polyelectrolyte in aqueous solution. Journal of Colloid and Interface Science 306 (2) : 405-410. ScholarBank@NUS Repository. https://doi.org/10.1016/j.jcis.2006.10.020
Abstract: The effect of alkali halides (NaBr, NaCl, KCl) on the interactions between the cationic gemini surfactant hexylene-1,6-bis(dodecyldimethylammonium bromide) (12-6-12) and the anionic polyelectrolyte sodium polyacrylate (NaPAA) in aqueous solution has been investigated by fluorescence emission spectroscopy, UV transmittance, zeta potential, and transmission electron microscopy (TEM). With increased addition of NaBr, a counterbalancing salt effect on the critical aggregation concentration (CAC) is observed. At low concentrations, NaBr facilitates the formation of micelle-like structures between surfactant and polyelectrolyte and results in a smaller CAC. At high concentrations, NaBr screens the electrostatic attraction between surfactant and polyelectrolyte and leads to a larger CAC. Upon the formation of micelle-like structures at high surfactant concentrations, the addition of NaBr is favorable for larger aggregates. The microstructure detected by TEM show that a global structure is generally formed in the presence of NaBr. The interactions also depend on ion species. Compared to NaBr, the addition of NaCl or KCl yields a smaller CAC. © 2006 Elsevier Inc. All rights reserved.
Source Title: Journal of Colloid and Interface Science
URI: http://scholarbank.nus.edu.sg/handle/10635/64541
ISSN: 00219797
DOI: 10.1016/j.jcis.2006.10.020
Appears in Collections:Staff Publications

Show full item record
Files in This Item:
There are no files associated with this item.

SCOPUSTM   
Citations

23
checked on Dec 7, 2017

WEB OF SCIENCETM
Citations

18
checked on Nov 22, 2017

Page view(s)

28
checked on Dec 11, 2017

Google ScholarTM

Check

Altmetric


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.