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A kind of hybrid nanoparticle, preparation method and anti-ultraviolet application

A technology of hybrid nanoparticles and hybrid particles, applied in the direction of nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve the problems of inapplicability to large-scale production, complicated preparation process, and difficulty in industrial promotion , to achieve excellent anti-ultraviolet effect, simple preparation method, and improve the effect of toughness and mechanical properties

Active Publication Date: 2021-10-15
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, inorganic metal nanoparticles have strong photocatalytic properties, which may induce polymer degradation, and also have the problem of not being easy to disperse.
(3) The construction of an inorganic nanoparticle assembly layer can reflect ultraviolet light to avoid photocatalytic effects, but requires precise control of the assembly parameters of the particles, the preparation process is complicated, and it is difficult to industrialize
However, the above methods involve extraction, microscopic regulation, dialysis, etching and other steps, and the preparation is cumbersome and not suitable for large-scale production.

Method used

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  • A kind of hybrid nanoparticle, preparation method and anti-ultraviolet application
  • A kind of hybrid nanoparticle, preparation method and anti-ultraviolet application
  • A kind of hybrid nanoparticle, preparation method and anti-ultraviolet application

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Effect test

Embodiment 1

[0036] (1) Preparation of precursor dispersion: the titanium dioxide precursor dispersion is obtained by hydrolysis of titanium salt. Mix ethanol, isopropanol, and deionized water (volume ratio 15:85:10) into 120ml of compound solvent, and add 0.009 mol (3.06g) tetrabutyl titanate, after 30min vigorous stirring to obtain a suspension of a large amount of white precipitate, centrifuged, washed, and then uniformly dispersed in 90ml deionized water to obtain dispersion A; for the preparation of dopamine precursor solution, 0.0001mol (0.019g) dopamine hydrochloride monomer was dissolved in 5ml deionized water to obtain dispersion B;

[0037] (2) Synthesis of hybrid nanoparticles: adjust pH=2 with dilute hydrochloric acid, uniformly mix dispersion A and dispersion B for 1 hour, then adjust pH=7.5 with dilute sodium hydroxide solution, and then reflux reaction at 80°C 10h, obtain the dispersion liquid of titanium dioxide / polydopamine hybrid nanoparticle; Centrifugation, washing, dry...

Embodiment 2

[0039](1) Preparation of precursor dispersion: the titanium dioxide precursor dispersion is obtained by hydrolysis of titanium salt. Mix ethanol, isopropanol, and deionized water (volume ratio 15:85:10) into 120ml of compound solvent, and add 0.009 mol (2.278g) titanium isopropoxide, after 30min vigorous stirring to obtain a suspension of a large amount of white precipitate, centrifuged, washed, and then evenly dispersed in 90ml deionized water to obtain dispersion A; the preparation of dopamine precursor solution, 0.0001mol ( 0.019g) dopamine hydrochloride monomer was dissolved in 5ml deionized water to obtain dispersion B;

[0040] (2) Synthesis of hybrid nanoparticles: adjust pH=2 with dilute hydrochloric acid, uniformly mix dispersion A and dispersion B for 1 hour, then adjust pH=7.5 with dilute sodium hydroxide solution, and then reflux reaction at 90°C 6h, to obtain the dispersion of titanium dioxide / polydopamine hybrid nanoparticles; centrifugation, washing, drying can ...

Embodiment 3

[0042] (1) Preparation of precursor dispersion: the titanium dioxide precursor dispersion is obtained by hydrolysis of titanium salt. Mix ethanol, isopropanol, and deionized water (volume ratio 15:85:10) into 120ml of compound solvent, and add 0.009 mol (3.06g) tetrabutyl titanate, after 30min vigorous stirring to obtain a suspension of a large amount of white precipitate, centrifuged, washed, and then uniformly dispersed in 90ml deionized water to obtain dispersion A; for the preparation of dopamine precursor solution, 0.0001mol (0.0232g) DHI monomer was dissolved in 5ml deionized water to obtain dispersion B;

[0043] (2) Synthesis of hybrid nanoparticles: adjust pH=3 with acetic acid, uniformly mix dispersion A and dispersion B for 1 h, then adjust pH=7.5 with Tris aqueous solution (pH=8.5), and then reflux at 75°C React for 12 hours to obtain a dispersion of titanium dioxide / polydopamine hybrid nanoparticles; centrifugation, washing, and drying can obtain Hybrid Nanopart...

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Abstract

A hybrid nanoparticle, a preparation method and an anti-ultraviolet application belong to the technical field of nanocomposite materials. First prepare the amorphous titanium dioxide precursor dispersion and the dopamine / dopamine-like monomer precursor dispersion respectively; then mix the amorphous titanium dioxide precursor dispersion and the dopamine / dopamine-like monomer precursor dispersion, adjust the pH, and heat and stir reaction to obtain a titanium dioxide / polydopamine hybrid particle dispersion; finally, the prepared hybrid particle dispersion is separated and purified by centrifugation or dialysis to obtain titanium dioxide / polydopamine hybrid nanoparticles. The prepared nanoparticles can be used to prepare transparent ultraviolet shielding composite materials, and have excellent barrier, photocatalysis, and photothermal conversion properties. Further, it can be applied in packaging materials, window materials, agricultural film materials, sunscreen and skin care and other fields.

Description

technical field [0001] The invention relates to a preparation method of a nanocomposite material, in particular to a small-diameter hybrid nanoparticle, a preparation method and its application in a transparent anti-ultraviolet composite material, belonging to the field of functional composite materials. Background technique [0002] As we all know, the sunlight reaching the surface of the earth is mainly composed of infrared light, visible light and ultraviolet light. Among them, ultraviolet light has high energy, and an appropriate amount of ultraviolet light is beneficial to the health of the body, but long-term ultraviolet radiation is easy to damage the eyes and skin and cause serious damage. Induce diseases and even cause cancer; in addition, ultraviolet radiation is the biggest cause of outdoor aging of most polymer materials, which will lead to performance degradation and shortened service life. Therefore, in order to reduce energy consumption and UV damage, a lot of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G73/06C08K3/22C08L67/04C08L79/04C08J5/18C08L29/04C08L97/00C08L63/00B82Y40/00B82Y30/00
CPCB82Y30/00B82Y40/00C08G73/0672C08J5/18C08J2329/04C08J2367/04C08J2479/04C08K3/22C08K2003/2241C08K2201/011C08L63/00C08L67/04C08L97/005C08L2201/08C08L2201/10C08L2201/14C08L79/04
Inventor 东为富张正汪洋李婷黎赛瑶马丕明蒋杰
Owner JIANGNAN UNIV
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