A method of the Preparation of Fibrillar and 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%2F16%3A86099173" target="_blank" >RIV/61989100:27640/16:86099173 - isvavai.cz</a>

Result on the web

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DOI - Digital Object Identifier

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Result language

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Original language name

A method of the Preparation of Fibrillar and 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

JP - Industrial processes and processing

OECD FORD branch

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Project

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Continuities

S - Specificky vyzkum na vysokych skolach

Publication year

2016

Confidentiality

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

Patent/design ID

JP5961266B2

Publisher

JP001 -

Publisher name

Japan Patent Office (JPO)

Place of publication

Tokyo

Publication country

JP - JAPAN

Date of acceptance

Aug 2, 2016

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