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Preparation method of particle diameter controllable monodisperse polystyrene microspheres

A polystyrene microsphere, monodisperse technology, applied in the field of preparation of monodisperse polystyrene microspheres, can solve the problems of large distribution coefficient, uncontrollable particle size of PS microspheres, waste of manpower, financial resources and resources, and achieve The effect of simple process and easy operation

Inactive Publication Date: 2012-08-29
UNISIZE TECH CHANGZHOU
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In recent years, although the preparation method of monodisperse PS microspheres with large particle size has been reported in the literature, the particle size of the prepared PS microspheres is often uncontrollable, and the distribution coefficient is large, resulting in a great waste of manpower, financial resources and resources. waste

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Add 9488g of ethanol and 10g of polyvinylpyrrolidone to a clean reaction vessel, pass through nitrogen protection, and stir at room temperature for 20 minutes to a homogeneous system, then add 500g of styrene monomer and 2.5g of azobisisobutyronitrile . The temperature was raised to 10°C, and the reaction was carried out at constant temperature for 45 hours. After the reaction is finished, cool to room temperature, centrifuge the product, wash repeatedly with ethanol, and dry to obtain monodisperse PS microspheres with a particle size of 1.2 μm and a distribution coefficient of 2.8%.

Embodiment 2

[0028] Add 514g of ethanol, 140g of water and 13.0g of polyvinylpyrrolidone into a clean 1L four-neck flask, pass through nitrogen protection, and stir at room temperature for 20 minutes to a homogeneous system, then add 32.5g of styrene monomer and Azodiisobutyronitrile 0.2 g. The temperature was raised to 75° C., and the reaction was carried out at constant temperature for 16 hours. After the reaction is completed, cool to room temperature, centrifuge the product, wash repeatedly with ethanol, and dry to obtain monodisperse PS microspheres with a particle size of 2.1 μm and a distribution coefficient of 2.3%.

Embodiment 3

[0030] Add 593g of ethanol and 5.9g of polyethylene glycol to a clean 1L four-neck flask, pass through nitrogen protection, and stir at room temperature for 30 minutes to a homogeneous system, then add 108g of styrene monomer and benzyl peroxide Acyl 0.7g. The temperature was raised to 50° C., and the reaction was performed at a constant temperature for 20 hours. After the reaction was completed, the product was cooled to room temperature, centrifuged, washed repeatedly with ethanol, and dried to obtain monodisperse PS microspheres with a particle size of 7.8 μm and a distribution coefficient of 3.1%.

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Abstract

The invention relates to a preparation method of particle diameter controllable monodisperse polystyrene microspheres. The particle diameter controllable monodisperse polystyrene microspheres are prepared from the following raw materials in percentage by mass: 5.0-40.0 percent of styrene monomer, 0.025-0.125 percent of initiator, 0.1-2.0 percent of dispersant and the balance of reaction medium. Through excellent formula proportion design, the contents of the monomer and the dispersant are changed to achieve the effect of controlling the preparation of the monodisperse polystyrene microspheres of different particle diameters; the process is simple and easy to operate; batch production scale can be achieved; and industrialization can be easily realized.

Description

technical field [0001] The invention relates to a preparation method of monodisperse polystyrene microspheres, in particular to a preparation method of monodisperse polystyrene microspheres with controllable particle size. Background technique [0002] Polymer microspheres with uniform particle size and good monodispersity have broad application prospects in many fields due to their large specific surface area, surface reaction ability, and strong adsorption. They are a new development in the development of polymer science in recent decades. Research areas. Among them, the application of polystyrene (PS) microspheres has developed rapidly, and is widely used in standard metrology, colloid science, analytical chemistry, food chemical industry, cosmetics, coatings, plastic processing, medicine, bioengineering, information engineering, liquid crystal, etc. Fields such as pads and microelectronics technology, especially in the field of biomedicine, are of great significance to ...

Claims

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Application Information

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IPC IPC(8): C08F112/08C08F2/14
Inventor 吴建才纪志勇陈胜利
Owner UNISIZE TECH CHANGZHOU
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