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Preparation method of monodispersed polymer microsphere

A polymer, monodisperse technology, applied in the field of preparation of monodisperse polymer microspheres, can solve the problems of poor repeatability of PS microspheres, difficult to control precisely, and achieve good monodispersity, small particle size deviation, and repeatability. good effect

Inactive Publication Date: 2016-03-16
BEIJING HUOLIYUAN TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the main problem at present is that the repeatability of the particle size and relative standard deviation of the prepared PS microspheres is poor, and it is difficult to accurately control the PS microspheres during the preparation process.

Method used

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  • Preparation method of monodispersed polymer microsphere
  • Preparation method of monodispersed polymer microsphere
  • Preparation method of monodispersed polymer microsphere

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preparation example Construction

[0032] A kind of preparation method of monodisperse polymer microsphere of the present invention comprises the following steps:

[0033] (0) Add ethanol, polyvinylpyrrolidone and water into the reaction vessel, and heat up and stir until the temperature is 66-70°C;

[0034] (1) Add styrene and azobisisobutyronitrile to the reaction vessel after timing for 0.5 to 1 hour to carry out dispersion polymerization;

[0035] (2) After reacting for 1 to 4 hours, add a polymerization inhibitor (p-benzoquinone or p-tert-butylcatechol) to the reaction system, and the mass ratio of the polymerization inhibitor to the monomer is 0.005% to 0.08%: 1;

[0036] (3) After reacting for 15-18 hours, store the prepared polystyrene microspheres in a reagent bottle.

Embodiment 1

[0038] A preparation method of monodisperse polymer microspheres, comprising the following steps:

[0039] (0) Add 200mL of ethanol, 5.4g of polyvinylpyrrolidone and 160mL of water into the reaction vessel, heat up and stir until the temperature is 66°C;

[0040] (1) Add 187mL styrene and 3.0g azobisisobutyronitrile to the reaction vessel after timing for 1h to carry out dispersion polymerization;

[0041] (2) After reacting for 1h, add 0.01g p-benzoquinone to the reaction system;

[0042] (3) After reacting for 15 hours, the prepared polystyrene microspheres were stored in a reagent bottle.

[0043] The transmission electron micrographs of the polystyrene microspheres prepared above are as follows: figure 1 shown by figure 1 It can be seen that the PS microspheres prepared by the method of the present invention exhibit a spherical shape, smooth surface, no agglomeration between the microspheres, and the monodispersity of the PS microspheres is very good.

[0044] right f...

Embodiment 2

[0046] A preparation method of monodisperse polymer microspheres, comprising the following steps:

[0047] (0) Add 200mL of ethanol, 5.4g of polyvinylpyrrolidone and 160mL of water into the reaction vessel, heat up and stir until the temperature is 69°C;

[0048] (1) Add 187mL styrene and 3.0g azobisisobutyronitrile to the reaction vessel after timing for 0.5h to carry out dispersion polymerization;

[0049] (2) After reacting for 2 hours, add 0.12g p-tert-butylcatechol to the reaction system;

[0050] (3) After reacting for 18 hours, the prepared polystyrene microspheres were stored in a reagent bottle.

[0051] The transmission electron micrographs of the polystyrene microspheres prepared above are as follows: figure 2 shown by figure 2 It can be seen that the PS microspheres prepared by the method of the present invention exhibit a spherical shape, smooth surface, no agglomeration among the microspheres, and the monodispersity of the PS microspheres is very good.

[0...

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Abstract

The present invention discloses a preparation method of monodispersed polymer microsphere, and belongs to the technical field of the preparation of polymers. The method of the invention comprises the steps of: adding an organic solvent, a stabilizer and water into a reaction vessel and heating with stirring; then adding a polymer monomer and an initiator, and conducting dispersion polymerization reaction; reacting for 1-4 h, and adding a polymerization inhibitor to the system; and after the reaction, preserving the prepared monodispersed polymer microspheres in a reagent bottle. According to the preparation method of the monodispersed polymer microspheres provided by the invention, the polymerization inhibitor is added timely in the growth period of polystyrene microspheres, so that the prepared monodispersed microspheres have the advantages of good monodispersion, small particle size variation and good reproducibility; and the method is applicable to the bulk preparation of monodispersed polystyrene microspheres.

Description

technical field [0001] The invention belongs to the technical field of polymer preparation, in particular to a preparation method of monodisperse polymer microspheres. Background technique [0002] Monodisperse, large particle size, polymer microspheres with different particle shapes and surface characteristics have specific properties such as large specific surface area, strong adsorption, strong agglutination, and surface reaction ability, so they are used in standard metrology, immunology, and biology. Engineering, analytical chemistry, chemical industry and microelectronics have extremely broad application prospects. With the development of liquid crystal technology, polymer microspheres have broad application prospects as spacers for liquid crystal displays. However, there are strict requirements for polymer microspheres used as liquid crystal display spacers: the particle size is uniform, and the relative standard deviation of the particle size is required to be below...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F112/08C08F2/40C08F2/08
CPCC08F112/08C08F2/08C08F2/40
Inventor 刘艳丽李蕴翔王晓东慕建洲李银
Owner BEIJING HUOLIYUAN TECH CO LTD
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