Light-controlled slow-release spherical silica nano spice and preparation method thereof

A spherical silicon dioxide, silicon dioxide technology, applied in chemical instruments and methods, nanotechnology for materials and surface science, nanotechnology, etc., can solve the problems of uncontrollable fragrance release process, poor long-term effect of fragrance, etc. Achieving the effect of slow fragrance retention time, high load rate and convenient use

Active Publication Date: 2018-09-14
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

An important reason for the poor long-lasting performance of spices is the uncontrollable release process of spices. Therefore, precise and controllable release of spices is required to solve the existing technical problems

Method used

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  • Light-controlled slow-release spherical silica nano spice and preparation method thereof
  • Light-controlled slow-release spherical silica nano spice and preparation method thereof
  • Light-controlled slow-release spherical silica nano spice and preparation method thereof

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preparation example Construction

[0026] The present invention provides a light-controlled slow-release spherical silica nano perfume and a preparation method thereof. The preparation method includes the following steps:

[0027] Synthesis of photosensitive silane coupling agent;

[0028] Preparation of nanometer mesoporous silica balls;

[0029] Reacting the photosensitive silane coupling agent with the nano mesoporous silica ball to obtain the photosensitive nano mesoporous silica ball;

[0030] The photosensitive nanometer mesoporous silica ball is loaded with perfume, and the organic solvent and unencapsulated perfume are removed to obtain the light-controlled slow-release spherical silica nano perfume.

[0031] The invention adopts the nano mesoporous silica to encapsulate the fragrance and prepares the light-controlled slow-release nano fragrance to solve the unstable, volatile, and uncontrollable problems of the fragrance release process.

[0032] Specifically, the present invention discloses a preparation method ...

Embodiment 1

[0048] In this embodiment, the light-controlled slow-release nano perfume is prepared by the following method, which specifically includes the following steps:

[0049] (1) Preparation of photosensitive silane coupling agent

[0050] Dissolve 3-isocyanatopropyltrimethoxysilane (247.36mg) and 4-aminoazobenzene (197.24mg) in ultra-dry tetrahydrofuran and heat at 80°C under reflux for 24h to obtain a crude product; heat the crude product at -20°C The purified photosensitive silane coupling agent was obtained by recrystallization from hexane.

[0051] (2) Preparation of nano mesoporous silica balls

[0052] Cetyltrimethylammonium bromide (400mg) and 25% ammonia solution (7mL) were dissolved in deionized water (96mL) and heated to 80°C; after 30min, tetraethyl orthosilicate (1.87mL) Dissolve it in ethanol (2mL) and add it dropwise to the above surfactant sol during stirring; after reacting at 80°C for 2h, filter and collect the filter residue, first wash it with 95% ethanol solution and d...

Embodiment 2

[0060] In this embodiment, the light-controlled slow-release nano perfume is prepared by the following method, which specifically includes the following steps:

[0061] (1) Preparation of photosensitive silane coupling agent

[0062] Dissolve 3-isocyanatopropyltrimethoxysilane (247.36mg) and 4-aminoazobenzene (197.24mg) in ultra-dry tetrahydrofuran and heat at 80°C under reflux for 24h to obtain a crude product; heat the crude product at -20°C The purified photosensitive silane coupling agent was obtained by recrystallization from hexane.

[0063] (2) Preparation of nano mesoporous silica balls

[0064] Dissolve cetyltrimethylammonium bromide (400mg) and 25% ammonia solution (7mL) in deionized water (96mL) and heat to 80°C; after 1h, remove tetraethylorthosilicate (1.87mL) Dissolve it in methanol (2mL) and add it dropwise to the above surfactant sol during stirring; after reacting at 70°C for 2 hours, filter the residue to collect, first wash it thoroughly with 95% ethanol solution a...

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Abstract

The invention discloses light-controlled slow-release spherical silica nano spice and a preparation method thereof. The preparation method comprises the steps that a photosensitive silane coupling agent is synthesized; nano mesoporous silica spheres are prepared; the photosensitive silane coupling agent and the nano mesoporous silica spheres are reacted to obtain photosensitive nano mesoporous silica spheres; the photosensitive nano mesoporous silica spheres are loaded with spice, and after organic solvent and the spice which is not entrapped are removed, the light-controlled slow-release spherical silica nano spice is obtained. According to the light-controlled slow-release spherical silica nano spice and the preparation method thereof, nano mesoporous silica is adopted for entrapping thespice and preparing the light-controlled slow-release nano spice, thus the problems are solved that the spice is unsteady and volatile, and the spice release process is uncontrollable.

Description

Technical field [0001] The invention belongs to the technical field of fine chemicals, and specifically relates to a light-controlled slow-release spherical silicon dioxide nano flavor and a preparation method thereof. Background technique [0002] With the progress of social civilization, people's quality of life improves, and the aromatic smell is gradually praised by people. Perfume has been widely used in cosmetics, silk, leather and wallpaper. But perfumes are mainly composed of volatile small molecule compounds that are unstable and volatile. The important reason for the poor long-lasting effect of perfume is the uncontrollable release process of perfume. Therefore, precise and controllable release of perfume is required to solve the existing technical problems. Summary of the invention [0003] In view of the shortcomings of the prior art, the main purpose of the present invention is to provide a light-controlled and sustained-release spherical silica nano perfume and a p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C11B9/00B82Y40/00B82Y30/00C01B33/141
CPCB82Y30/00B82Y40/00C01B33/1412C01B33/1417C01P2002/88C01P2004/03C01P2004/32C11B9/00C11B9/0003
Inventor 张欣张田露卢治国
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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