Nanoparticle-carbon dots@silica composite nanoparticle with long afterglow luminescence, long afterglow material and preparation method

A composite nanoparticle, long afterglow luminescence technology, applied in the field of 3D printing materials, can solve the problems of few types and high process costs

Active Publication Date: 2022-07-22
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage is that there are few types of materials that can be used for forming, and the process cost is high

Method used

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  • Nanoparticle-carbon dots@silica composite nanoparticle with long afterglow luminescence, long afterglow material and preparation method
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  • Nanoparticle-carbon dots@silica composite nanoparticle with long afterglow luminescence, long afterglow material and preparation method

Examples

Experimental program
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Effect test

preparation example Construction

[0053] The preparation method of carbon dots@silica composite nanoparticles with long afterglow luminescence properties includes the following steps:

[0054] (1) Preparation of carbon dot materials:

[0055] Step 1: Add 16 mL of deionized water to the jar, add a clean magnetic stirrer, slowly add 4 mL of ethanolamine with stirring, and then add 8 mL of phosphoric acid dropwise.

[0056] Step 2: After the solution is cooled, take out the stirring magnet, transfer the solution to a polytetrafluoroethylene reaction kettle, and react for 5-6 minutes under microwave reaction conditions with a power of 700-750W.

[0057] Step 3: After the solution is cooled, add 40 mL of deionized water, and disperse evenly under an ultrasonic cleaner.

[0058] Step 4: After the suspension is adjusted to pH=7 with sodium bicarbonate, centrifuge at 12000-15000rpm for 10min, collect the supernatant, and filter it with a 0.22μm water-based membrane filter while retaining the carbon black The precipi...

Embodiment 1

[0075] Example 1 Morphology characterization of carbon dots, mesoporous silica and carbon dots@silica composite nanoparticles used in the present invention

[0076] The carbon dots were prepared by microwave method. Mesoporous silica nanoparticles and carbon dot silica nanoparticles were uniformly dispersed in anhydrous ethanol solution and placed on a 200 mesh copper plate with a diameter of 3 mm for transmission electron microscopy (HITACHI HT7800, Japan) scanning photography. TEM image analysis results showed that the purified CDs had a quasi-spherical morphology with an average particle size of 2.5 nm. The unencapsulated mesoporous silica showed monodisperse spheres, and the mesoporous morphology of Cdots@silica composite nanoparticles obtained by encapsulating Cdots by hydrothermal reaction disappeared, but still had monodisperse properties.

Embodiment 2

[0077] Example 2 Particle size comparison of mesoporous silica and carbon dots@silica composite nanoparticles.

[0078] The particle size of mesoporous silica nanoparticles and carbon dots@silica composite nanoparticles was determined by dynamic light scattering (DLS nanoparticle size analyzer). Compared with mesoporous silica nanoparticles, the particle size of carbon dots@silica nanoparticles is reduced, indicating that the mesoporous structure collapses when mesoporous silica is encapsulated with carbon dots under hydrothermal conditions, resulting in particle size reduction. Small.

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Abstract

The invention relates to a nanoparticle-carbon dot@silica composite nanoparticle with long afterglow luminescence, a long afterglow material for 3D printing and a preparation method. The method is encapsulated into mesoporous silica nanoparticles, and the new carbon dots@silica composite nanoparticles obtained after encapsulation have the property of long afterglow at room temperature of 1.35s. The large-scale preparation has the conditions for industrial production, and the obtained composite nanoparticles still have a long afterglow life of 1.26s and a luminescence of about 10s visible to the naked eye after mass production. Doping them into photosensitive resin for 3D printing, 3D printing Printing materials have the advantages of low cost, stable environment, green environmental protection, etc., the processing method is simple and easy to operate, and can be stably prepared on a large scale, and has broad practical application prospects.

Description

technical field [0001] The invention belongs to 3D printing materials, and relates to a nanoparticle-carbon dot@silica composite nanoparticle with long afterglow luminescence, a long afterglow material for 3D printing and a preparation method. Background technique [0002] 3D printing, also known as additive manufacturing technology (AM), is the process of processing a three-dimensional mathematical model built on a computer into a solid model through a specific technology, which can meet individual needs to the greatest extent. The main 3D printing technologies in the fields of parts manufacturing and organ printing are: inkjet direct structuring, selective laser sintering, fused deposition, and stereo light curing technology. Among them, Stereo Lithography Apparatus (SLA) uses ultraviolet laser to scan liquid photosensitive polymers (such as acrylic resin, epoxy resin, etc.) layer by layer. Technology. This technology can make parts with complex structure, high precision...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/02C09K11/65B82Y20/00B82Y30/00B82Y40/00C08F283/06C08F220/20C08F2/44C08K9/10C08K3/04B33Y70/10
CPCC09K11/025C09K11/65B82Y20/00B82Y30/00B82Y40/00C08F283/06C08F2/44C08K9/10C08K3/04B33Y70/10C08K2201/011C08F220/20
Inventor 刘小网陈雪
Owner NORTHWESTERN POLYTECHNICAL UNIV
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