Preparation method of rose-bengal B/polystyrene/silicon dioxide fluorescent microspheres

A technology of silica and polystyrene, which is applied in the field of surface modification of composite nanomaterials, can solve the problems of easily agglomerated dye molecules and materials, poor monodispersity, and difficulty in general application, etc., and achieve stable fluorescence performance and good dispersion , the effect of convenient operation

CN109266329AInactive Publication Date: 2019-01-25DONGHUA UNIV +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2019-01-25
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to a preparation method of rose-bengal B / polystyrene / silicon dioxide fluorescent microspheres. The preparation method comprises the steps that 1, polystyrene / silicon dioxide composite particles are dispersed in a swelling medium, and ultrasound and swelling are performed to obtain polystyrene / silicon dioxide dispersion liquid; 2, rose-bengal B is dissolved in a swelling agentto prepare a rose-bengal B solution; 3, the rose-bengal B solution obtained in the step 2 is mixed with the polystyrene / silicon dioxide dispersion liquid obtained in the step 1, stirring reaction isperformed, and washing, centrifugation and drying are performed to obtain the rose-bengal B / polystyrene / silicon dioxide fluorescent microspheres. The preparation method has the advantages of being simple in preparation process, convenient to operate, low in reaction temperature, capable of saving energy and the like.
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Description

Technical field

[0001] The invention belongs to the technical field of surface modification of composite nano materials, and particularly relates to a method for preparing rose bengal B / polystyrene / silica fluorescent microspheres. Background technique

[0002] At present, the methods for loading dyes into polystyrene / silica composite materials mainly include polymerization method and bonding method. The polymerization method refers to a method in which dyes are directly added to the reaction system during the polymerization reaction. Although this method is simple to operate, the prepared products are often poorly monodispersed and easy to agglomerate. Bonding method refers to the method of chemical reaction, which makes the dye molecules directly bind to the surface of the material in the form of chemical bonds. Similarly, this method has certain requirements on the structure of dye molecules and materials, so it is difficult to universally apply.

[0003] The swelling method h...

Examples

Embodiment 1

[0031] (1) Disperse 5.0 g of polystyrene / silica composite particles in 45ml of deionized water, ultrasonicate for 30 minutes, and swell for 3 hours to obtain a polystyrene / silica dispersion with a mass fraction of 10%;

[0032] (2) Dissolve 0.7185g of Rose Red B in 100ml of chloroform, pipette 1000μL of the solution with a pipette, and add it to 9ml of chloroform to make a concentration of 1.5*10 -3 mol.L -1 Rose Bengal B solution;

[0033] (3) Mix 6ml of Rose Bengal B solution obtained in step (2) with 35ml of polystyrene / silica dispersion obtained in step (1), stir and react at 60°C for 6h. After the reaction, use absolute ethanol Wash, centrifuge at 12000 rpm for 10 minutes, remove the supernatant, repeat the operation 3 times, and then dry in a blast drying oven at 55°C for 24 hours to obtain rose bengal B-loaded polystyrene / silica fluorescent microspheres .

[0034] The SEM results of the rose bengal B-loaded polystyrene / silica fluorescent microspheres prepared in this example ...

Embodiment 2

[0039] (1) Disperse 5.0 g of polystyrene / silica composite particles in 45ml of deionized water, ultrasonicate for 30 minutes, and swell for 3 hours to obtain a polystyrene / silica dispersion with a mass fraction of 10%;

[0040] (2) Dissolve 0.2874g of Rose Red B in 100ml of chloroform, pipette 1000μL of the solution with a pipette, and add it to 9ml of chloroform to make a concentration of 6.0*10 -4 mol.L -1 Rose Bengal B solution;

[0041] (3) Mix 6ml of Rose Bengal B solution obtained in step (2) with 35ml of polystyrene / silica dispersion obtained in step (1), stir and react at 60°C for 6h. After the reaction, use absolute ethanol Wash, centrifuge at 12000 rpm for 10 minutes, remove the supernatant, repeat the operation 3 times, and then dry in a blast drying oven at 55°C for 24 hours to obtain rose bengal B-loaded polystyrene / silica fluorescent microspheres .

[0042] The Rose Bengal B-loaded polystyrene / silica fluorescent microspheres prepared in this example were dispersed in w...

Embodiment 3

[0044] (1) Disperse 5.0g of polystyrene / silica composite particles in 45ml of deionized water, ultrasonicate for 30min, and swell for 3h to obtain a polystyrene / silica dispersion with a mass fraction of 10%;

[0045] (2) Dissolve 0.1437g of Rose Bengal B in 100ml of chloroform, pipette 1000μL of the solution with a pipette, and add it to 9ml of chloroform to prepare a concentration of 3.0*10 -4 mol.L -1 Rose Bengal B solution;

[0046] (3) Mix 6ml of Rose Bengal B solution obtained in step (2) with 35ml of polystyrene / silica dispersion obtained in step (1), stir and react at 60°C for 6h. After the reaction, use absolute ethanol Wash, centrifuge at 12000 rpm for 10 minutes, remove the supernatant, repeat the operation 3 times, and then dry in a blast drying oven at 55°C for 24 hours to obtain rose bengal B-loaded polystyrene / silica fluorescent microspheres .

[0047] The polystyrene / silica fluorescent microspheres loaded with Rose Bengal B prepared in this example were dispersed in d...