TY - JOUR
T1 - Gelation processes in the non-stoichiometric polylectrolyte-surfactant complex between κ-carrageenan and dodecyltrimethylammonium chloride in KCl
AU - Rosas-Durazo, Aarón
AU - Hernández, Javier
AU - Lizardi, Jaime
AU - Higuera-Ciapara, Inocencio
AU - Goycoolea, Francisco M.
AU - Argüelles-Monal, Waldo
PY - 2011/3/7
Y1 - 2011/3/7
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=79951927406&partnerID=8YFLogxK
U2 - 10.1039/c0sm00663g
DO - 10.1039/c0sm00663g
M3 - Artículo
AN - SCOPUS:79951927406
SN - 1744-683X
VL - 7
SP - 2103
EP - 2112
JO - Soft Matter
JF - Soft Matter
IS - 5
ER -