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

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 ...

AI Technical Summary

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 two-dimensional area, which is not universally representative; the third is that it is difficult to accurately distinguish the dispersion state of the multi-dimensional fluorescent nanoparticles in the composite material; the fourth is that it is impossible to monitor the multi-dimensional Evolution of the Dispersion State of Fluorescent Nanoparticles

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