%0 Journal Article
%T Origin of Invariant Gel Melting Temperatures in the c-T Phase Diagram of an Organogel
%+ Institut Charles Sadron (ICS)
%+ Laboratoire Charles Coulomb (L2C)
%A Christ, Elliot
%A Blanc, Christophe
%A Al Ouahabi, Abdelaziz
%A Maurin, David
%A Le Parc, Rozenn
%A Bantignies, Jean-Louis
%A Guenet, Jean-Michel
%A Collin, Dominique
%A Mesini, Philippe J.
%Z Labex Matisse
%< avec comité de lecture
%Z L2C:16-100
%@ 0743-7463
%J Langmuir
%I American Chemical Society
%V 32
%N 19
%P 4975-4982
%8 2016-05-17
%D 2016
%R 10.1021/acs.langmuir.6b00995
%Z Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci]Journal articles
%X Binary c–T phase diagrams of organogelators in solvent are frequently simplified to two domains, gel and sol, even when the melting temperatures display two distinct regimes, an increase with T and a plateau. Herein, the c–T phase diagram of an organogelator in solvent is elucidated by rheology, DSC, optical microscopy, and transmitted light intensity measurements. We evidence a miscibility gap between the organogelator and the solvent above a threshold concentration, cL. In this domain the melting or the formation of the gel becomes a monotectic transformation, which explains why the corresponding temperatures are nonvariant above cL. As shown by further studies by variable temperature FTIR and NMR, different types of H-bonds drive both the liquid–liquid phase separation and the gelation.
%G English
%2 https://hal.science/hal-01344912/document
%2 https://hal.science/hal-01344912/file/Christ2016_wo_rev_marks.pdf
%L hal-01344912
%U https://hal.science/hal-01344912
%~ INSERM
%~ CNRS
%~ UNIV-STRASBG
%~ L2C
%~ INSA-STRASBOURG
%~ INC-CNRS
%~ MIPS
%~ UNIV-MONTPELLIER
%~ SITE-ALSACE
%~ INSA-GROUPE
%~ ANR
%~ UM-2015-2021
%~ TEST2-HALCNRS