Sustained-release mildewproof/antibacterial and self-cleaning bifunctional casein-based nanometer microcapsule coating material and preparation method thereof

A technology of nano-microcapsules and coating materials, applied in antifouling/underwater coatings, coatings, protein coatings, etc., to achieve high stability, unique structure and characteristics, and broad application prospects

Active Publication Date: 2017-06-23
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So far, there are few public reports on the preparation of casein-based nano-hybrid coating materials with anti-mold / anti-bacterial and self-cleaning dual-functional properties by using nano-microcapsule technology at home and abroad.

Method used

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  • Sustained-release mildewproof/antibacterial and self-cleaning bifunctional casein-based nanometer microcapsule coating material and preparation method thereof
  • Sustained-release mildewproof/antibacterial and self-cleaning bifunctional casein-based nanometer microcapsule coating material and preparation method thereof
  • Sustained-release mildewproof/antibacterial and self-cleaning bifunctional casein-based nanometer microcapsule coating material and preparation method thereof

Examples

Experimental program
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Effect test

preparation example Construction

[0025] The preparation method of the slow-release anti-mildew / antibacterial and self-cleaning bifunctional casein-based nano-microcapsule coating material involved in the present invention comprises the following steps:

[0026] Weigh 60-100mg casein powder, add it to 10-30mL weak acid solution with a mass fraction of 1-3%, stir and dissolve at room temperature to 50°C for 12h-24h, and cool to room temperature to obtain solution A;

[0027] Weigh 3-10mg antifungal agent or antibacterial agent, 30-70mg polymer micelle, 18-54μL butyl titanate and 6-18μL coupling agent and add them to 600-800μL organic solvent at the same time, and at room temperature to 50 ℃ After stirring and dissolving for 12h-24h, it was cooled to room temperature to obtain solution B;

[0028] At room temperature, the solution B was slowly added to the solution A at a speed not higher than 2 μL / min, and the stirring was continued for 24h-72h; that is, a slow-release anti-mildew, antibacterial, and self-clean...

Embodiment 1

[0034] Example 1: Weigh 60 mg of casein powder, add it to 10 mL of acetic acid solution with a mass fraction of 1%, and stir and dissolve at room temperature for 12 h, then cool to room temperature to obtain solution A; weigh 3 mg of N -Octyl-4-isothiazolin-3-one, 30 mg F127, 18 μL butyl titanate, and 6 μL γ-methacryloyloxypropyltrimethoxysilane were simultaneously added to 600 μL tetrahydrofuran, and the After stirring and dissolving at room temperature for 12 hours, cooled to room temperature to obtain solution B; at room temperature, solution B was slowly added to solution A at a rate of 2 µL / min, and continued stirring for 24 hours; namely, the target product was obtained.

Embodiment 2

[0035] Example 2: Weigh 100 mg of casein powder, add it to 30 mL of citric acid solution with a mass fraction of 3%, stir and dissolve at 50 °C for 24 h, and cool to room temperature to obtain solution A; weigh 10 mg of sulfhydryl Benzothiazole, 70mg F127, 54μL butyl titanate and 18μL vinyltrimethoxysilane were added to 800μL dichloromethane at the same time, and after stirring and dissolving at 50°C for 24h, cooled to room temperature to obtain solution B; , the solution B was slowly added to the solution A at a rate of 1 µL / min, and the stirring was continued for 72 h; namely, the target product was obtained.

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Abstract

The invention relates to a sustained-release mildewproof / antibacterial and self-cleaning bifunctional casein-based nanometer microcapsule coating material and a preparation method thereof. The preparation method comprises the following steps: adding casein powder into a weak acid solution, performing stirring dissolution and cooling to obtain a solution A, adding a mildewproof agent or antibacterial agent, polymeric micelles, tetrabutyl orthotitanate and a coupling agent into an organic solvent, performing stirring dissolution and cooling to obtain a solution B, and slowly adding the solution B into the solution A for continuous stirring, so as to obtain a target product. According to the material and the preparation method thereof, a mildewproof agent or antibacterial agent coated polymer-based inorganic composite nanometer microcapsule is prepared by adopting casein as a substrate, introducing the mildewproof agent or the antibacterial agent into a core layer and introducing an inorganic nanometer shell layer in a precursor hydrolysis manner, and is nanometer-scale, uniform in size distribution and controllable in size; the inorganic nanometer shell layer is nanometer titanium dioxide, and a coating self-cleaning effect can be achieved under ultraviolet irradiation, so that the material has mildewproof / antibacterial and self-cleaning bifunctionality.

Description

technical field [0001] The invention relates to a casein-based nano-microcapsule coating material, in particular to a slow-release anti-mildew / antibacterial and self-cleaning dual-function casein-based nano-microcapsule coating material and a preparation method thereof. Background technique [0002] With the enhancement of people's awareness of environmental protection, natural polymer materials are gradually replacing synthetic polymers due to their non-toxic and degradable properties. As a renewable natural protein, casein is widely used as a film-forming substrate because of its film-forming properties such as light resistance, ironing resistance, good air permeability and good hygienic properties. However, the most fatal defect of casein as a coating material is that the film is hard and brittle and not resistant to corrosion. In order to enhance its stability to microorganisms, it is generally modified physically or chemically. For example, antifungal or antibacterial ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D189/00C09D5/14C09D5/16C09D7/12
CPCC08K2201/011C09D5/14C09D5/1618C09D5/1662C09D5/1687C09D7/63C09D189/00C08L53/00C08K13/02C08K5/47C08K5/057C08K5/5415C08K5/5425C08K5/3447C08K5/544C08K5/59
Inventor 徐群娜樊蓁旎张帆马建中
Owner SHAANXI UNIV OF SCI & TECH
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