Synthesis of liquid crystalline thioether-functionalized hydroxypropyl cellulose esters
Ohlendorf, Peter; Greiner, Andreas
Polymer Chemistry, 2015, vol 6, 14, pp. 2734-2739DOI:10.1039/C4PY01709AVisit the full articleBack to the overview
Controlling Interfacial Film Formation in Mixed Polymer–Surfactant Systems by Changing the Vapor Phase
Mokhtari, Tahereh; Pham, Quoc Dat; Hirst, Christopher; O’Driscoll, Benjamin M. D.; Nylander, Tommy; Edler, Karen J.; Sparr, Emma
Here we show that transport-generated phase separation at the air?liquid interface in systems containing self-assembling amphiphilic molecules and polymers can be controlled by the relative humidity (RH) of the air. We also show that our observations can be described quantitatively with a theoretical model describing interfacial phase separation in a…
Structure and ionic conductivity of liquid crystals having propylene carbonate units
Eisele, Andreas; Kyriakos, Konstantinos; Bhandary, Rajesh; Schönhoff, Monika; Papadakis, Christine M.; Rieger, Bernhard
Liquid-crystalline compounds with a perfluorinated aromatic ring as the mesogenic core and a propylene carbonate unit were prepared and mixed with lithium bis(trifluoro-methanesulfonyl)-imide (LiTFSI). The self-assembly was driven by the interaction of the polar propylene carbonate unit. Thus it is one of the few examples of liquid crystals with only…
Liquid Crystalline Phase Formation in Suspensions of Solid Trimyristin Nanoparticles
Gehrer, Simone; Schmiele, Martin; Westermann, Martin; Steiniger, Frank; Unruh, Tobias
The presence of liquid crystalline phases in suspensions of solid lipid nanoparticles can increase the risk of their gelling upon administration through fine needles. Here we study the formation of liquid crystalline phases in aqueous suspensions of platelet-like shaped solid lipid nanoparticles. A native lecithin-stabilized trimyristin (20 wt %) suspension…
Liquid-phase characterization of molecular interactions in polyunsaturated and n-fatty acid methyl esters by 1H low-field nuclear magnetic resonance
Meiri, Nitzan; Berman, Paula; Colnago, Luiz Alberto; Moraes, Tiago Bueno; Linder, Charles; Wiesman, Zeev
To identify and develop the best renewable and low carbon footprint biodiesel substitutes for petroleum diesel, the properties of different biodiesel candidates should be studied and characterized with respect to molecular structures versus biodiesel liquid property relationships. In our previous paper, 1H low-field nuclear magnetic resonance (LF-NMR) relaxometry was investigated…
Unilamellar Vesicles from Amphiphilic Graphene Quantum Dots
Nandi, Sukhendu; Kolusheva, Sofiya; Malishev, Ravit; Trachtenberg, Alexander; Vinod, T. P.; Jelinek, Raz
Graphene quantum dots (GQDs) have attracted considerable interest due to their unique physicochemical properties and various applications. For the first time it is shown that GQDs surface-functionalized with hydrocarbon chains (i.e., amphiphilic GQDs) self-assemble into unilamellar spherical vesicles in aqueous solution. The amphiphilic GQD vesicles exhibit multicolor luminescence that can…
Preparation and Properties of a Graphene Oxide Intercalation Compound Utilizing Hydrocalumite Layered Double Hydroxide as Host Structure
Plank, Johann; Zou, Nan; Zhao, Zongbin; Dekany, Imre
Particularly small graphene oxide (GO) nano sheets were synthesized and intercalated into a hydrocalumite type layered double hydroxide (Ca2Al-LDH) host structure. Synthesis of the GO intercalation compound was performed via controlled rehydration of tricalcium aluminate (Ca3Al2O6) in the presence of GO. Formation of Ca2Al-GO-LDH was evidenced from elemental, thermogravimetric, IR…
Formation of liquid crystalline phases in aqueous suspensions of platelet-like tripalmitin nanoparticles
Schmiele, Martin; Gehrer, Simone; Westermann, Martin; Steiniger, Frank; Unruh, Tobias
Suspensions of platelet-like shaped tripalmitin nanocrystals stabilized by the pure lecithin DLPC and the lecithin blend S100, respectively, have been studied by small-angle x-ray scattering (SAXS) and optical observation of their birefringence at different tripalmitin (PPP) concentrations φ PPP . It could be demonstrated that the platelets of these potential…
Self-organization of Fe clusters on mesoporous TiO2 templates
Ziegler, Patrick; Paul, Neelima; Müller-Buschbaum, Peter; Wiedemann, Birgit; Kreuzpaintner, Wolfgang; Jutimoosik, Jaru; Yimnirun, Rattikorn; Setzer, Annette; Esquinazi, Pablo; Böni, Peter; Paul, Amitesh
Fe layers with thicknesses between 5 and 100 nm were sputtered on mesoporous nanostructured anatase TiO2 templates. The morphology of these hybrid films was probed with grazing-incidence small-angle X-ray scattering and X-ray reflectivity, complemented with magnetic measurements. Three different stages of growth were found, which are characterized by different correlation…
Effect of biotechnologically modified alginates on LDH structures
Sieber, Volker; Plank, Johann; Sperl, Nadine; Schmid, Jochen; de Reese, Johanna
Four alginates possessing different guluronic/mannuronic acid ratios and one acetylated alginate were investigated with respect to their behaviour during intercalation into layered double hydroxides (LDHs). Two alginates were commercial products while the others were synthesised by way of bacterial fermentation and in one sample followed by enzymatic treatment. Intercalation was…
