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Micro-or nanocapsules having photocatalytic properties for controlled release of diffusing agents and respective method of production

A technology of photocatalysis and capsules, which is applied in the direction of microcapsule preparations, microcapsules, chemical instruments and methods, etc.

Inactive Publication Date: 2018-03-27
UNIVERSITY OF MINHO
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  • Abstract
  • Description
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Problems solved by technology

No mechanism for release from control of the nucleus

Method used

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  • Micro-or nanocapsules having photocatalytic properties for controlled release of diffusing agents and respective method of production
  • Micro-or nanocapsules having photocatalytic properties for controlled release of diffusing agents and respective method of production
  • Micro-or nanocapsules having photocatalytic properties for controlled release of diffusing agents and respective method of production

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Embodiment Construction

[0143] An example of a photocatalytic nanomaterial is based on TiO 2of nanoparticles. These materials were synthesized using a hydrothermal sol-gel method in an autoclave. Prepare a colloidal solution with water and 2-propanol (10:1). As an example, 125 μL of 2-propanol and 1125 μL of water were mixed in a homogenizer at ambient temperature and at a pH of 2.40 (adjusted with a solution of 0.1 M HCl) under vortex stirring. Optionally, triethylamine can be used to prepare TiO-based 2 nanoparticles for doping them with nitrogen for the purpose of increasing semiconductor bandgap energy and solar light absorption efficiency. Under strong magnetic stirring at 400-600 rpm and at ambient temperature, 1000 μL of titanium isopropoxide (a precursor source of titanium atoms) was added to a volume of 1250 μL of the colloidal solution. In the case of synthesizing doped particles, 3000 μL of triethylamine was added to the resulting white suspension. Amines are responsible for doping Ti...

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Abstract

The present disclosure pertains to the field of the production of functional coatings for the controlled release of volatile agents. More specifically, it consists in capsules, in particular microcapsules or nanocapsules which are chemically functionalised with photocatalytic nanomaterials on the inner or outer surface of the capsule shell, and which release, by the action of sunlight or artificial light in the same spectrum of electromagnetic radiation, the diffusing or active agent, which can be a vapour, a liquid or a solid. The present disclosure thus relates to a capsule for carrying an active agent with photocatalytic properties, having an outer diameter of 0.1-500 um, the capsule being formed by a shell and a core to contain the diffusing agent. The present disclosure also relates to a method for producing the disclosed capsules. The fields of use are the pharmaceutical, bioengineering, civil engineering, agrochemical, automobile and food industries.

Description

technical field [0001] The invention belongs to the field of preparation of functional coatings for controlled release of volatile agents. More specifically, it consists of capsules, in particular microcapsules or nanocapsules chemically functionalized by photocatalytic nanomaterials on the inner or outer surface of the capsule wall by the action of sunlight or the same reaction with electromagnetic radiation. A spectrum of artificial light releasing diffusers / active agents, which are vapor, liquid or solid. [0002] Applications include the pharmaceutical field, biotechnology, civil engineering, hygiene, agricultural chemistry, automotive and food. Background technique [0003] The present invention consists of the technology of heterostructured materials with the ability to activate by sunlight to disperse certain agents encapsulated in microcapsules or nanocapsules functionalized with photocatalytic nanomaterials. Photocatalytic nanomaterials can be nanostructures such ...

Claims

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Application Information

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IPC IPC(8): B01J13/12B01J13/16A01N25/28A61K9/50A61K51/12C11D3/50
CPCA01N25/18A01N25/28A61K9/5031A61K41/0042B01J13/12B01J13/16C11D3/505A61K9/50A61K51/12C11D3/50
Inventor 卡洛斯·若泽·马塞多·塔瓦雷斯朱丽安娜·菲利帕·戈维亚·马克斯
Owner UNIVERSITY OF MINHO
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