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Flow Synthesis (flow + synthesis)
Selected AbstractsA Continuous Flow Synthesis of Micrometer-Sized Actuators from Liquid Crystalline ElastomersADVANCED MATERIALS, Issue 47 2009Christian Ohm We demonstrate the use of a microfluidic setup to prepare monodisperse and spherical beads from a liquid crystalline elastomer. These particles show a strong and reversible shape change into a cigar-like conformation during the transition into the isotropic phase. These properies are a result of the monodomainic alignment of the mesogens in the flow field of the microfluidic setup. [source] ChemInform Abstract: Integrated Micro Flow Synthesis Based on Sequential Br,Li Exchange Reactions of p-, m-, and o-Dibromobenzenes.CHEMINFORM, Issue 15 2008Aiichiro Nagaki Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a "Full Text" option. The original article is trackable via the "References" option. [source] Bioreactors Based on Monolith-Supported Ionic Liquid Phase for Enzyme Catalysis in Supercritical Carbon DioxideADVANCED SYNTHESIS & CATALYSIS (PREVIOUSLY: JOURNAL FUER PRAKTISCHE CHEMIE), Issue 7 2007Pedro Lozano Abstract Bioreactors with covalently supported ionic liquid phases (SILP) were prepared as polymeric monoliths based on styrene,divinylbenzene or 2-hydroxyethyl methacrylate,ethylene dimethacrylate, and with imidazolium units loadings ranging from 54.7 to 39.8,% wt IL per gram of polymer. The SILPs were able to absorb Candida antarctica lipase B (CALB), leading to highly efficient and robust heterogeneous biocatalysts. The bioreactors were prepared as macroporous monolithic mini-flow systems and tested for the continuous flow synthesis of citronellyl propionate in supercritical carbon dioxide (scCO2) by transesterification. The catalytic activity of these mini-flow-bioreactors remained practically unchanged for seven operational cycles of 5,h each in different supercritical conditions. The best results were obtained when the most hydrophobic monolith, M-SILP- 8 -CALB, was assayed at 80,°C and 10,MPa, reaching a total turnover number (TON) of 35.8×104 mol product/mol enzyme. The results substantially exceeded those obtained for packed-bed reactors with supported silica-CALB-Si-4 catalyst under the same experimental conditions. [source] Microfluidic-Assisted Synthesis of Polymer ParticlesCHEMICAL ENGINEERING & TECHNOLOGY (CET), Issue 8 2008A. Serra Abstract Microfluidic devices have recently emerged as promising tools for the synthesis of polymer particles. Over conventional processes, microfluidic-assisted processes allow the production of polymer particles with an improved control over their sizes, size distributions, morphologies, and compositions. In this paper, the most common microfluidic devices are reviewed. Both projection photolithography and emulsification processes are reported for the continuous flow synthesis of polymer particles from a stream of polymerizable liquids. For the latter process, two distinct categories of microfluidic devices have been identified: microchannel-based and capillary-based microsystems. For each category, the existing geometries are described and the different emulsification methods including the co-flowing, cross-flowing, or flow-focusing of the continuous and dispersed phases are commented upon. Finally, for each microsystem the various polymer particles achieved in such devices including, but not restricted to, janus, core,shell, or porous particles and capsules are reported. [source] | ||||||||||