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Gelling Lamellar Phases of the Binary System Water–Didodecyldimethylammonium Bromide with an Organogelator

Does the presence of a gel network influence the properties of a lyotropic liquid crystal? Does the replacement of oil by a lyotropic liquid crystal influence the properties of an organogel? To answer these questions we study gelled lyotropic liquid crystals (LLC). In the present study we show that it is possible to gel the lamellar phase of the binary system water–didodecyl dimethylammonium bromide (2C12DAB) with the organogelator 12-hydroxyoctadecanoic acid (12-HOA). We compare various properties of the gelled LLC phases with the “parent systems”, i.e., with the binary organogel consisting of n-decane–12-HOA and with the nongelled LC phases, respectively. Optical and electron microscopy, differential scanning calorimetry (DSC), rheometry, as well as small and wide-angle X-ray scattering (SWAXS) proved the coexistence of an Lα phase and a 12-HOA gel network in the gelled Lα phase. However, a small influence of the Lα phase on the gel properties was seen, namely slightly lower sol–gel transition temperatu...

Authors:   Sachi Koitani; Sonja Dieterich; Natalie Preisig; Kenji Aramaki; Cosima Stubenrauch
Journal:   Langmuir
Year:   2017
DOI:   10.1021/acs.langmuir.7b02101
Publication date:   13-Oct-2017
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