The Counter- and Coion Influence on the Interaction between Sodium Hyaluronate and Tetradecyltrimethylammonium Bromide

The minimum concentration of salt (critical electrolyte concentration, CEC) required to suppress precipitation/coacervation in an aqueous solution of sodium hyaluronate (NaHy) and tetradecyltrimethylammonium bromide (TTAB) has been studied and CEC diagrams constructed for a set of inorganic salts, a...

Full description

Saved in:
Bibliographic Details
Published in:Langmuir 1999-01, Vol.15 (2), p.353-357
Main Authors: Herslöf-Björling, Åsa, Björling, Mikael, Sundelöf, Lars-Olof
Format: Article
Language:English
Subjects:
Chemistry
Exact sciences and technology
General and physical chemistry
Surface physical chemistry
Surface-active agents: properties
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The minimum concentration of salt (critical electrolyte concentration, CEC) required to suppress precipitation/coacervation in an aqueous solution of sodium hyaluronate (NaHy) and tetradecyltrimethylammonium bromide (TTAB) has been studied and CEC diagrams constructed for a set of inorganic salts, as a function of TTAB concentration. An initial rapid increase in the CEC is observed for low TTAB concentrations at the onset of the coacervation region. When the TTAB concentration is increased, a CEC plateau is reached at a certain TTAB concentration. Thereafter, the CEC value stays fairly constant, independent of TTAB concentration, until finally the CEC value starts to decrease at a sufficiently high TTAB concentration. The CEC plateau value and the onset of the decrease of CEC are shown to depend strongly on the valence of the ions constituting the salt. For ions of equal valency, ion-specific effects are observed.
ISSN:0743-7463
1520-5827
DOI:10.1021/la980723k