A METHOD OF THE PREPARATION OF LAMELLAR POROUS MICROSTRUCTURES AND NANOSTRUCTURES BY MEANS OF CONTROLLED VACUUM FREEZE-DRYING OF LIQUID NANOPARTICLES DISPERSIONS

Result code in 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>

Result on the web

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DOI - Digital Object Identifier

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Result language

angličtina

Original language name

A METHOD OF THE PREPARATION OF LAMELLAR POROUS MICROSTRUCTURES AND NANOSTRUCTURES BY MEANS OF CONTROLLED VACUUM FREEZE-DRYING OF LIQUID NANOPARTICLES DISPERSIONS

Original language description

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.

Czech name

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Czech description

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Type

P - Patent

CEP classification

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OECD FORD branch

20501 - Materials engineering

Project

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Continuities

S - Specificky vyzkum na vysokych skolach

Publication year

2017

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Patent/design ID

EP 2 751 508 B1

Publisher

EPO_1 -

Publisher name

European Patent Office

Place of publication

Munich, The Hague, Berlin, Vienna, Brussels

Publication country

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Date of acceptance

Nov 22, 2017

Owner name

Vysoká škola báňská - Technická univerzita Ostrava, Centrum nanotechnologií

Method of use

A - Výsledek využívá pouze poskytovatel

Usage type

A - K využití výsledku jiným subjektem je vždy nutné nabytí licence