NDLI: Gelation processes in the non-stoichiometric polylectrolyte–surfactant complex between κ-carrageenan and dodecyltrimethylammonium chloride in KCl

Content Provider	Royal Society of Chemistry (RSC)
Author	Hernández, Javier Rosas-Durazo, Aarón Higuera-Ciapara, Inocencio Lizardi, Jaime Goycoolea, Francisco M. Argüelles-Monal, Waldo
Copyright Year	2011
Abstract	The gelation processes taking place in the non-stoichiometric complex between κ-carrageenan and dodecyltrimethylammonium chloride in KCl were studied. The mechanical properties of the hydrogels show a gradual reinforcement when the amount of surfactant in the complex increases, indicative of a more densely cross-linked polymer network. The thermal and viscoelastic behavior of complexes during cooling is similar to that of κ-carrageenan alone. Nevertheless, the melting of the gel splits into two endothermic processes. The emergence of a new transition during heating indicates that the overall polymer network is related to two types of networks: one formed by typical bonds between κ-carrageenan macromolecular chains and the other associated to hydrophobic blocks developing as a consequence of the cooperative nature of polyelectrolyte–surfactant interactions. In the hydrogel these two networks co-exist, probably semi-interpenetrated, somehow interconnected at the molecular level.
Starting Page	2103
Ending Page	2112
Page Count	10
File Format	HTM / HTML PDF
ISSN	1744683X
Volume Number	7
Issue Number	5
Journal	Soft Matter
DOI	10.1039/c0sm00663g
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Viscoelasticity Endothermic process Chloride Non-stoichiometric compound Polymer Hydrophobe Surfactant Gel
Content Type	Text
Resource Type	Article
Subject	Chemistry Condensed Matter Physics

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