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Polystyrene nanoparticle preparation method

A polystyrene nanometer and particle technology is applied in the field of preparation of polystyrene nanoparticles, which can solve the problems of complex equipment and large particle size, and achieve the effects of easy post-processing, low cost, and favorable utilization.

Inactive Publication Date: 2009-12-02
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the obtained particle size is still large, and the required equipment is more complicated

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0026] 1) Styrene 5g, 1-[4-(2-hydroxyethoxy)-2-hydroxyl-2', 2'-dimethylethanone 0.2g (20 mmol per liter), hexadecyl 0.2 g of trimethylammonium bromide and 45 g of deionized water were added to a reaction flask with a quartz cap and mixed, passed through nitrogen, stirred and emulsified for 30 minutes, and the stirring speed was 300 rpm;

[0027] 2) Place the emulsified reaction solution in step 1) under the radiation of a 375W straight tube high-pressure mercury lamp, adjust the incident light intensity to 8000 microwatts per square centimeter, and react for 2.5 hours with stirring at a speed of 300 rpm. After the reaction is completed, the material is discharged and filtered with a G4 funnel, and the filtrate is the product polystyrene nanoparticles.

[0028] From figure 2 It can be seen from the figure that the particle size of polystyrene nanoparticles is about 25 nanometers; image 3 It can be seen that the conversion rate of styrene can reach more than 95%.

Embodiment 2

[0030] 1) Styrene 5g, 2-hydroxyl-2-methyl-1-phenyl-1-acetone 0.15g (20 mmol per liter), cetyltrimethylammonium bromide 0.2g and deionized water 45g, added to a reaction bottle with a quartz cap and mixed, stirred and emulsified with nitrogen for 30 minutes, and the stirring speed was 300 rpm;

[0031] 2) Place the emulsified reaction solution in step 1) under the radiation of a 375W straight tube high-pressure mercury lamp, adjust the incident light intensity to 8000 microwatts per square centimeter, and react for 2.5 hours with stirring at a speed of 300 rpm. After the reaction is completed, the material is discharged and filtered with a G4 funnel, and the filtrate is the product polystyrene nanoparticles.

[0032] From Figure 4 It can be seen that the particle size of polystyrene nanoparticles is about 25 nanometers; Figure 5 It can be seen that the conversion rate of styrene can reach 100%.

Embodiment 3

[0034] 1) Weigh 3 g of styrene, 2 g of divinylbenzene, 0.2 g of 1-[4-(2-hydroxyethoxy)-2-hydroxyl-2', 2'-dimethylethanone (20 mmol per liter), 0.2 g of cetyltrimethylammonium bromide and 45 g of deionized water were added into a reaction flask with a quartz cover and mixed, nitrogen was passed, stirring and emulsifying was carried out for 30 minutes, and the stirring speed was 300 revolutions per minute;

[0035] 2) Place the emulsified reaction solution in step 1) under the radiation of a 375W straight tube high-pressure mercury lamp, adjust the incident light intensity to 8000 microwatts per square centimeter, and react for 2.5 hours with stirring at a speed of 300 rpm. After the reaction is completed, the material is discharged and filtered with a G4 funnel, and the filtrate is the product polystyrene nanogel particles.

[0036] From Figure 6 It can be seen that the particle diameter of the polystyrene nanogel particles is about 30 nanometers; Figure 7 The conversion ra...

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Abstract

The invention relates to a polystyrene nanoparticle preparation method which belongs to the nanometer materials preparation field. The existing polystyrene nanoparticle preparation method has the disadvantages of large dosage of surfactant, complex equipment, high reaction temperature and the like. The preparation method of the invention comprises the following steps: mixing the styrene, water, alkyl ammonium bromide cationic surfactant and cracked photoinitiator to emulsify, placing the mixture in ultraviolet radiation to cause polymerization, obtaining polystyrene nanoparticle by filtration or centrifugation; adding crosslinking agent in the polymerization reaction system to obtain polystyrene nanometer gel particle. In the invention water is used as a reaction medium, the polymerization can be performed at room temperature; and in the reaction system, the monomer concentration is high, the dosage of surfactant is less, the reaction rate is fast, the monomer conversion rate is high, and the equipment is simple and economic, thus being easy to realize large-scale industrialized production.

Description

technical field [0001] The invention belongs to the field of nanomaterial preparation, and in particular relates to a preparation method of polystyrene nanoparticles. Background technique [0002] In recent years, due to the rapid development of nanotechnology, the preparation of polymer nanoparticles has gradually become a research hotspot in nanotechnology. Polymer nanoparticles have a stable morphological structure. Polymer nanoparticles can be designed, synthesized and prepared at the molecular level by selecting polymerization methods and monomers, and their size and particle size distribution can be easily controlled, so that they have small size effects. , surface effect and quantum tunneling effect, it also has other specific functions, such as temperature, pH, electric field and magnetic field and other responsiveness. As a common polymer nanoparticle, polystyrene nanoparticles have a wide range of potential applications in the fields of stealth materials, informat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F12/08C08F2/28C08F2/50
Inventor 杨万泰胡雪丰刘莲英邓建平马育红
Owner BEIJING UNIV OF CHEM TECH
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