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A kind of preparation method of inorganic-organic composite fluorescent microsphere

A compound fluorescent and organic technology, applied in the direction of chemical instruments and methods, luminescent materials, etc., can solve the problems of complex preparation process, limited application field of fluorescent microspheres, weak fluorescence, etc., and achieve the effect of uniform luminescence

Inactive Publication Date: 2016-03-02
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Fluorescent microspheres have a relatively stable morphological structure and luminescent behavior, and are much less affected by external conditions such as solvents, heat, electricity, and magnetism than pure fluorescent compounds. However, due to their complex preparation process, weak fluorescence, easy aggregation and background The limitation of fluorescence and so on, so that the application field of fluorescent microspheres is strictly limited

Method used

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  • A kind of preparation method of inorganic-organic composite fluorescent microsphere
  • A kind of preparation method of inorganic-organic composite fluorescent microsphere
  • A kind of preparation method of inorganic-organic composite fluorescent microsphere

Examples

Experimental program
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Effect test

Embodiment 1

[0020] Ultrasonic dispersion of 250mg SiO per 60mL acetonitrile 2 For MPS nanospheres, add 2 mmol AM, 0.036 g allyl fluorescein, and 0.1 mL DVB per 60 mL acetonitrile; after mixing, add 2.5% initiator azobisisobutyronitrile (AIBN) based on the total amount of monomers. Blow in nitrogen for 15 minutes to remove air, and seal under nitrogen atmosphere. Using thermal initiation polymerization, place it in a constant temperature oil bath at 60°C and heat it for 24 hours. After the polymerization is completed, a yellow crude product is obtained. Soak and wash with ethanol until the washing liquid is colorless, and use a fluorescence spectrometer to detect that there is no luminescent substance in the washing liquid.

Embodiment 2

[0022] Ultrasonic dispersion of 250mg SiO2MPS nanospheres per 60mL acetonitrile, add 4mmolAM, 0.072g allylfluorescein and 1.0mLDVB per 60mL acetonitrile respectively; after mixing well, add 2.5% initiator azobisisobutyronitrile based on the total monomer content (AIBN). Blow in nitrogen for 15 minutes to remove air, and seal under nitrogen atmosphere. Using thermal initiation polymerization, place it in a constant temperature oil bath at 60°C and heat it for 24 hours. After the polymerization is completed, a yellow crude product is obtained. Soak and wash with ethanol until the washing liquid is colorless, and use a fluorescence spectrometer to detect that there is no luminescent substance in the washing liquid. .

Embodiment 3

[0024] Ultrasonic disperse 250mg SiO2MPS nanospheres in 60mL acetonitrile, add 3mmolAM, 0.054g allylfluorescein and 0.5mLDVB per 60mL acetonitrile respectively; after mixing well, add 2.5% initiator azobisisobutyronitrile of the total monomer content (AIBN). Blow in nitrogen for 15 minutes to remove air, and seal under nitrogen atmosphere. Using thermal initiation polymerization, place it in a constant temperature oil bath at 60°C and heat it for 24 hours. After the polymerization is completed, a yellow crude product is obtained. Soak and wash with ethanol until the washing liquid is colorless, and use a fluorescence spectrometer to detect that there is no luminescent substance in the washing liquid. See TEM, SEM and fluorescence emission spectra respectively figure 1 , figure 2 with image 3 .

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Abstract

The invention discloses a method for preparing inorganic-organic composite fluorescent microspheres, belonging to the technical field of fluorescent material preparation. The method is to synthesize acrylamide (AM) as a monomer, allyl fluorescein as a fluorescent dye, divinylbenzene (DVB) as a cross-linking agent, and 2,2'-azobisohexylbutane by precipitation polymerization. Inorganic-organic composite fluorescent microspheres (SiO2MPSPoly(AM-co-DVB)) with nitrile (AIBN) as the initiator. The prepared SiO2MPSPoly (AM-co-EGDMA) microspheres have the characteristics of narrow particle size distribution, simple synthesis, good dispersion and strong fluorescence emission.

Description

technical field [0001] The invention relates to a method for preparing inorganic-organic composite fluorescent microspheres, which belongs to the technical field of fluorescent material preparation. Background technique [0002] Fluorescent microspheres, as a special functional microsphere, are more and more popular among scientific researchers for their stable morphological structure and stable and efficient luminous efficiency. The newly developed fluorescent microspheres have uniform particle size, good monodispersity, good stability and high luminous efficiency. Fluorescent microspheres generally refer to microspheres marked with fluorescent substances (including surface coating) on ​​the surface of the microspheres or microspheres containing fluorescent substances (such as embedding or aggregation) in the internal structure of the microspheres, which can excite fluorescence when stimulated by external energy. It is a functional microsphere loaded with fluorescent molec...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/06C09K11/02
Inventor 高林李春香李秀颖王吉祥闫永胜张岐
Owner JIANGSU UNIV