Method for rapidly preparing multi-dimensional fluorescent nanoparticles and quantitatively characterizing dynamic dispersion state of multi-dimensional fluorescent nanoparticles in situ

A fluorescent nanoparticle, dispersed state technology, used in fluorescence/phosphorescence, material analysis by optical means, measurement devices, etc., can solve the problem of difficulty in accurately distinguishing multidimensional fluorescent nanoparticle dispersion states, inability to monitor the evolution process, and lack of universality. Representation and other issues, to achieve the effect of fast test speed, reduced preparation difficulty, and enhanced curing uniformity

Active Publication Date: 2020-07-17
BEIJING UNIV OF CHEM TECH
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Problems solved by technology

In summary, there are certain limitations in the method of characterizing the dispersion state of multidimensional fluorescent nanoparticles in composite materials: first, sample preparation is time-consuming, the quality of the sample depends on professional skills, and there is some damage to the sample during the test; The test window is in a small

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  • Method for rapidly preparing multi-dimensional fluorescent nanoparticles and quantitatively characterizing dynamic dispersion state of multi-dimensional fluorescent nanoparticles in situ

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[0022] Example 1

[0023] SiO for multi-dimensional nanoparticles 2 Nanoparticles and carbon nanotubes, fluorescein with aggregation-induced luminescence properties are selected from tetrastyrene-rhodamine B and tetrastyrene-fluorescein isothiocyanate, onium salt cationic light containing long-chain alkyl or alkoxy groups As the initiator, [4-(2-hydroxy-3-butoxy-1-propoxy)]phenylphenyliodonium-hexafluoroantimonate iodonium salt was used. Under darkroom conditions, anhydrous ethanol, SiO 2 Nanoparticles, tetrastyrene-rhodamine B, anhydrous ethanol, carbon nanotubes, and tetraphenylethylene-fluorescein isothiocyanate two groups of systems were mixed uniformly by ultrasonic stirring in a proportion of 100:0.2:0.01 according to the parts by mass. The ultrasonic power is 80kW, the stirring speed is 400r / min, and the time is 1h. After mixing uniformly, the precursor solution was poured into a light-tight tetrafluoro round-bottomed flask, which was placed in a closed microwave rea...

Example Embodiment

[0026] Example 2

[0027] SiO for multi-dimensional nanoparticles 2 Nanoparticles and graphene oxide, fluorescein with aggregation-induced luminescence properties are selected from tetrastyrene-rhodamine B and tetrastyrene-7-amino-4-methylcoumarin, containing long-chain alkyl or alkoxyl groups. The onium salt type cationic photoinitiator adopts [4-(2-hydroxy-3-allyloxy-1-propoxy)]phenyl phenyl iodonium-hexafluoroarsenic acid iodonium salt. Under darkroom conditions, anhydrous ethanol, SiO 2 Nanoparticles, tetrastyrene-rhodamine B and anhydrous ethanol, graphene oxide, tetraphenylethylene-7-amino-4-methylcoumarin two groups of systems, in proportion to 100:1:0.05 according to the mass fraction Ultrasonic stirring respectively. The ultrasonic power is 120kW, the stirring speed is 800r / min, and the time is 1.5h. After mixing uniformly, the precursor solution was poured into a light-tight tetrafluoro round-bottomed flask, which was placed in a closed microwave reactor with a t...

Example Embodiment

[0030] Example 3

[0031]Carbon nanotubes and graphene oxide are selected for multi-dimensional nanoparticles, and fluorescein with aggregation-induced luminescence properties is selected from tetrastyrene-fluorescein isothiocyanate and tetrastyrene-7-amino-4-methylcoumarin. Onium salt cationic photoinitiator of long-chain alkyl or alkoxy group adopts [4-(2-hydroxy-3-alkoxy-1-propoxy)]phenyl phenyl iodonium-hexafluorophosphate iodonium salt . Under darkroom conditions, two systems of absolute ethanol, carbon nanotubes, tetrastyrene-fluorescein isothiocyanate and absolute ethanol, graphene oxide, and tetrastyrene-7-amino-4-methylcoumarin were combined. , according to the mass ratio of 100:0.5:0.02, respectively, ultrasonically stir evenly. The ultrasonic power is 100kW, the stirring speed is 600r / min, and the time is 2h. After mixing uniformly, the precursor solution was poured into a light-tight tetrafluoro round-bottomed flask, which was placed in a closed microwave reacto...

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Abstract

The invention relates to a method for rapidly preparing multi-dimensional fluorescent nanoparticles and quantitatively characterizing the dynamic dispersion state of the multi-dimensional fluorescentnanoparticles in situ. Fluorescein with aggregation-induced emission properties is quickly grafted to the surfaces of the multi-dimensional nanoparticles by utilizing continuous microwave radiation, and the multi-dimensional fluorescent nanoparticles with relatively high fluorescence intensity and fluorescence stability are simply and efficiently prepared in an environment-friendly manner. The method is based on an aggregation-induced emission principle and a fluorescence tracing principle. A fluorine krypton laser device and a laser confocal scanning microscope are combined to carry out online ultraviolet curing on the resin mixed solution, the respective dynamic dispersion states of the multi-dimensional fluorescent nanoparticles in the resin mixed solution in the online in-situ monitoring and curing process are realized, and the fractal coefficients of the multi-dimensional fluorescent nanoparticles are efficiently, quantitatively and automatically calculated online by further adopting a fractal dimension theory on the basis of the respective dynamic dispersion states. The method has important significance in controlling the optimal curing condition, researching the structure-property relationship of the nano composite material and finely preparing the high-performance composite material.

Description

technical field [0001] The invention belongs to the field of composite materials, in particular to a method for rapid preparation of multi-dimensional fluorescent nanoparticles and in-situ quantitative characterization of their dynamic dispersion state. Background technique [0002] Due to their excellent performance and traceability, fluorescent nanoparticles are widely used in the fields of aerospace, biomedicine and materials. From the perspective of microscopic scale, fluorescent nanoparticles can be divided into zero-dimensional configuration, one-dimensional configuration and two-dimensional configuration. These three-dimensional fluorescent nanoparticles have unique properties and different applications respectively. Today, most studies use single-dimensional fluorescent nanoparticles. However, in some specific applications, there are interactions and synergistic effects between multi-dimensional fluorescent nanoparticles, so their performance is better than that of ...

Claims

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Application Information

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IPC IPC(8): G01N21/64
CPCG01N21/6402
Inventor 贾晓龙孟柳罗锦涛马文丽还献华杨小平
Owner BEIJING UNIV OF CHEM TECH
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