74 research outputs found
Coexistence of Two Kinds of Fluorinated Hydrogenated Micelles as Building Blocks for the Design of Bimodal Mesoporous Silica with Two Ordered Mesopore Networks
Mesostrukturierte Materialien durch Neue Templatsysteme und Nutzung Mesoporöser Silikate als Nano-Reaktoren
Nanoparticles and nanosheets of aromatic polyimides via polycondensation in controlled pore geometries
SAXS analysis of mesoporous model materials: a validation of data evaluation techniques to characterize pore size, shape, surface area, and curvature of the interface
Mixed micellar phases of nonmiscible surfactants: Mesoporous silica with bimodal pore size distribution via the nanocasting process
Highly organized mesoporous silica monoliths were reproducibly prepared by nanocasting mixtures of fluorinated nonionic surfactants and micelles of two hydrocarbon block copolymers. It is the special feature of this fluorocarbon/hydrocarbon template mixture that they form not mixed micelles but individual micelles instead. By careful analysis of the pore architectures by gas sorption measurements and transmission electron microscopy in dependence on the relative template concentration, two different situations could be identified: (a) mesoscopically demixed samples and (b) mixed micellar phases where the two different micelles are packed in some type of organized alloy phase. Besides identification of such mixed phases for the first time for fluorocarbon/hydrocarbon mixtures, the resulting porous systems with controlled bimodal pore size distribution might be interesting from a materials perspective
Mixed micellar phases of nonmiscible surfactants: Mesoporous silica with bimodal pore size distribution via the nanocasting process
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