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| - Novel Type of Self-Assembled Polyamide and PolyimideNanoengineered ShellsFabrication of Microcontainers with ShieldingProperties
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| - Two types of microcontainers were prepared by using the adsorption of polyamide on the surface of micrometer-sized inorganic porous calcium carbonate microparticles followed by thermal conversion of the polyamide layers intopolyimide coatings. The effect of the preparation conditions on the structure and morphology of the microcontainerswas studied by transmission electron microscopy and scanning electron microscopy. The smoothest and defect-freecoatings were prepared using polyethylenimine as the supporting polymer. The thickness of the polyamide/polyimideshells was estimated by atomic force microscopy and scanning electron microscopy between 50 and 150 nm dependingon the quantity of the layers. The water-soluble antibiotic, doxorubicin hydrochloride, was used as a model compoundto demonstrate the efficiency of the microcontainers for encapsulation. The resistance of the novel microcontainersto solvent treatment was visualized by the confocal scanning fluorescence microscopy. It was demonstrated that thecombination of the high thermal and chemical resistance of polyamide/polyimide shell and the sorption capacity ofthe CaCO3 is very useful for development of highly protective microcontainers and thermal detectors for smart fabrics.
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