CAPSULE, NAMELY NANOCAPSULE, MICROCAPSULE OR MACROCAPSULE, HAVING A VERY LOW OXYGEN PERMEABILITY

A capsule, namely a nanocapsule, microcapsule or macrocapsule, comprises a shell and a core, wherein the core contains at least one compound being at least at any temperature between more than 0°C and 80°C at 101,325 kPa a liquid, and wherein the shell comprises semicrystalline cellulose nanofibers...

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Bibliographische Detailangaben
Hauptverfasser:	LANDFESTER, KATHARINA, HANNER, ANNA JUSTINA, RISBO, JENS, BALOUCHEV, STANISLAV
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	ADHESIVES CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY CHEMISTRY DYES FOODS OR FOODSTUFFS FOODS, FOODSTUFFS, OR NON-ALCOHOLIC BEVERAGES, NOT COVERED BYSUBCLASSES A23B - A23J HUMAN NECESSITIES HYGIENE LAKES MEDICAL OR VETERINARY SCIENCE METALLURGY MISCELLANEOUS APPLICATIONS OF MATERIALS MISCELLANEOUS COMPOSITIONS MORDANTS NATURAL RESINS ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES PAINTS PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL POLISHES PREPARATIONS FOR MEDICAL, DENTAL, OR TOILET PURPOSES PRESERVATION OF FOODS OR FOODSTUFFS, IN GENERAL SHAPING OR WORKING OF FOODSTUFFS, NOT FULLY COVERED BY ASINGLE OTHER SUBCLASS THEIR PREPARATION OR TREATMENT, e.g. COOKING, MODIFICATION OFNUTRITIVE QUALITIES, PHYSICAL TREATMENT THEIR RELEVANT APPARATUS THEIR TREATMENT, NOT COVERED BY OTHER CLASSES TRANSPORTING
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Beschreibung
Zusammenfassung:	A capsule, namely a nanocapsule, microcapsule or macrocapsule, comprises a shell and a core, wherein the core contains at least one compound being at least at any temperature between more than 0°C and 80°C at 101,325 kPa a liquid, and wherein the shell comprises semicrystalline cellulose nanofibers and/or semicrystalline cellulose nanocrystals having each a crystallinity index of at least 30%. These capsules have in particular a very low oxygen permeability and thus protects the liquid included in its core from oxygen. Accordingly, these capsules may be used for protecting for example food or food ingredients from oxygen. In addition, these capsules may be used to protect photoactive compounds from oxygen, such as phosphorescent compounds and photon upconversion compositions, in particular triplet-triplet annihilation upconversion compositions. L'invention concerne une capsule, à savoir une nanocapsule, une microcapsule ou une macrocapsule, qui comprend une coque et un cœur, le cœur contenant au moins un composé qui est au moins liquide à n'importe quelle température entre plus de 0°C et 80°C à 101,325 kPa, et la coque comprenant des nanofibres de cellulose semicristalline et/ou des nanocristaux de cellulose semicristalline ayant chacun un indice de cristallinité d'au moins 30%. Ces capsules ont en particulier une très faible perméabilité à l'oxygène et protègent ainsi de l'oxygène le liquide présent dans leur noyau. Par conséquent, ces capsules peuvent être utilisées pour protéger de l'oxygène, par exemple, des aliments ou des ingrédients alimentaires. De plus, ces capsules peuvent être utilisées pour protéger des composés photoactifs de l'oxygène, tels que des composés phosphorescents et des compositions d'interpolation de photons, en particulier des compositions d'interpolation d'annihilation triplet-triplet.