Method for producing silica nanocapsules containing water-soluble compounds, method for producing porous silica nanocapsules, silica nanocapsules containing water-soluble compounds, and porous silica nanocapsules

Abstract

This invention provides a method for producing silica nanocapsules without using reagents that are difficult to handle. [Solution] The present invention provides a method for producing silica nanocapsules containing a water-soluble compound, comprising hydrolyzing and dehydrating a silicon alkoxide in an aqueous solution containing a water-soluble compound to produce silica, wherein the water-soluble compound has a pyranone ring and a hydroxyl group. Furthermore, the present invention provides a method for producing porous silica nanocapsules, further comprising dispersing the water-soluble compound-encapsulated silica nanocapsules obtained by the above method in water or an aqueous solution to elute the water-soluble compound from the water-soluble compound-encapsulated silica nanocapsules.

Claims

1. The process involves generating silica by hydrolyzing and dehydrating a silicon alkoxide in an aqueous solution containing a silicon alkoxide and a water-soluble compound, and The water-soluble compound has a pyranone ring and a hydroxyl group. A method for producing silica nanocapsules containing water-soluble compounds.

2. The aqueous solution further contains an active ingredient, and The silica nanocapsule further contains the active ingredient. The method according to claim 1.

3. The method according to claim 2, wherein the active ingredient is a europium (III) chelate compound.

4. The method according to claim 2, wherein the active ingredient has a silanol group and / or a silicon alkoxide group.

5. The method according to claim 1, wherein the aqueous solution further contains citric acid.

6. The preparation method according to claim 1, wherein the water-soluble compound is ethyl maltol.

7. A method for producing porous silica nanocapsules, further comprising dispersing water-soluble compound-encapsulated silica nanocapsules obtained by the method described in any one of claims 1 to 5 in water or an aqueous solution to elute the water-soluble compound from the water-soluble compound-encapsulated silica nanocapsules.

8. A silica nanocapsule containing a water-soluble compound, which has a pyranone ring and a hydroxyl group.

9. The silica nanocapsule according to claim 8, further containing an active ingredient.

10. These porous silica nanocapsules contain active ingredients bound to the silica skeleton of the porous silica nanocapsule.

Images