A METHOD OF THE PREPARATION OF LAMELLAR POROUS MICROSTRUCTURES AND NANOSTRUCTURES BY MEANS OF CONTROLLED VACUUM FREEZE-DRYING OF LIQUID NANOPARTICLES DISPERSIONS
Identifikátory výsledku
Kód výsledku v IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27640%2F17%3A10239060" target="_blank" >RIV/61989100:27640/17:10239060 - isvavai.cz</a>
Výsledek na webu
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DOI - Digital Object Identifier
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Alternativní jazyky
Jazyk výsledku
angličtina
Název v původním jazyce
A METHOD OF THE PREPARATION OF LAMELLAR POROUS MICROSTRUCTURES AND NANOSTRUCTURES BY MEANS OF CONTROLLED VACUUM FREEZE-DRYING OF LIQUID NANOPARTICLES DISPERSIONS
Popis výsledku v původním jazyce
The invention relates to a method of preparation of fibrillar and lamellar porous microstructures and nanostructures of various density based on controlled vacuum freeze-drying of a liquid dispersion of nanoparticles. According to the required density and structure of a final product, the particle concentration in the dispersion is adjusted from very low values for formation of fine, predominantly fibrillar structures, to very high values for formation of highly porous materials with high values of surface area in unit volume. The liquid dispersion of particles is rapidly freezed into solid state inside a tightly closed volume. In this form it is submitted to vacuum freeze-drying with required rate of sublimation of molecules of a liquid dispersion medium, until their total removal, accompanied by the creation of fibrillar and/or lamellar porous microstructures and nanostructures with density proportional to the initial concentration of particles in the dispersion and high value of surface area in unit volume. The orientation of the normal vector of the dominant surface of sublimation interface can be set with regard to the required properties of the final sublimate structure from vertically upwards to vertically downwards. The sublimation rate is adjusted by combination of vacuum depth and external heating of the sublimation interface of the frozen material.
Název v anglickém jazyce
A METHOD OF THE PREPARATION OF LAMELLAR POROUS MICROSTRUCTURES AND NANOSTRUCTURES BY MEANS OF CONTROLLED VACUUM FREEZE-DRYING OF LIQUID NANOPARTICLES DISPERSIONS
Popis výsledku anglicky
The invention relates to a method of preparation of fibrillar and lamellar porous microstructures and nanostructures of various density based on controlled vacuum freeze-drying of a liquid dispersion of nanoparticles. According to the required density and structure of a final product, the particle concentration in the dispersion is adjusted from very low values for formation of fine, predominantly fibrillar structures, to very high values for formation of highly porous materials with high values of surface area in unit volume. The liquid dispersion of particles is rapidly freezed into solid state inside a tightly closed volume. In this form it is submitted to vacuum freeze-drying with required rate of sublimation of molecules of a liquid dispersion medium, until their total removal, accompanied by the creation of fibrillar and/or lamellar porous microstructures and nanostructures with density proportional to the initial concentration of particles in the dispersion and high value of surface area in unit volume. The orientation of the normal vector of the dominant surface of sublimation interface can be set with regard to the required properties of the final sublimate structure from vertically upwards to vertically downwards. The sublimation rate is adjusted by combination of vacuum depth and external heating of the sublimation interface of the frozen material.
Klasifikace
Druh
P - Patent
CEP obor
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OECD FORD obor
20501 - Materials engineering
Návaznosti výsledku
Projekt
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Návaznosti
S - Specificky vyzkum na vysokych skolach
Ostatní
Rok uplatnění
2017
Kód důvěrnosti údajů
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Údaje specifické pro druh výsledku
Číslo patentu nebo vzoru
EP 2 751 508 B1
Vydavatel
EPO_1 -
Název vydavatele
European Patent Office
Místo vydání
Munich, The Hague, Berlin, Vienna, Brussels
Stát vydání
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Datum přijetí
22. 11. 2017
Název vlastníka
Vysoká škola báňská - Technická univerzita Ostrava, Centrum nanotechnologií
Způsob využití
A - Výsledek využívá pouze poskytovatel
Druh možnosti využití
A - K využití výsledku jiným subjektem je vždy nutné nabytí licence