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Monodisperse polystyrene microspheres and preparation method and application thereof

A technology of polystyrene microspheres and polystyrene, applied in the direction of microsphere preparation, microcapsule preparation, etc., can solve the problem of reducing the water resistance, solvent resistance and mechanical properties of polymer products, expensive emulsifiers, and increasing product costs and other problems, to achieve the effects of strong controllability of particle size, low toxicity, and low environmental pollution

Active Publication Date: 2018-11-13
EAST CHINA NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in traditional emulsion polymerization, after the emulsion is formed into a film, the emulsifier will migrate to the surface of the latex film through the bulk phase of the polymer and be enriched, and it will be brought into the final product, and it is difficult to completely remove it in post-treatment processes such as water washing.
Factors such as isolation, water absorption, and exudation in the presence of emulsifiers reduce the water resistance, solvent resistance, and mechanical properties of polymer products, limiting their application. At the same time, emulsifiers are expensive and increase product costs.

Method used

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  • Monodisperse polystyrene microspheres and preparation method and application thereof
  • Monodisperse polystyrene microspheres and preparation method and application thereof
  • Monodisperse polystyrene microspheres and preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0057] The method for preparing monodisperse polystyrene microspheres in this embodiment comprises the following steps:

[0058] Measure 4.6ml of purified styrene monomer and 100ml of double-distilled water into a 250mL three-necked flask, place the beaker in an ultrasonic instrument (set the ultrasonic power to 99%, and set the ultrasonic time to 30min), add methanol ( The selected methanol specification is analytically pure, content ≥ 99.7%) until the mixed solution becomes uniform, clear and transparent, and the recorded methanol is 175ml. Weigh 0.1013g of potassium persulfate solid powder into the beaker, place the beaker in a water bath, set the temperature to 70°C and turn on the magnetic stirring button (the stirring speed is suitable, ~300rmp), and the reaction time is controlled at 6-7 hours. After the reaction was completed, the steam was distilled for 1h. Under stirring, the emulsion is cooled naturally, and the target product can be obtained by centrifugation etha...

Embodiment 2

[0060] The method for preparing monodisperse polystyrene microspheres in this embodiment comprises the following steps:

[0061] Measure 4.6ml of purified styrene monomer and 100ml of double-distilled water into a 250mL three-necked flask, place the beaker in an ultrasonic instrument (set the ultrasonic power to 99%, and set the ultrasonic time to 30min), and add ethanol ( The selected ethanol specification is analytically pure, content ≥ 99.5%) until the mixed solution becomes uniform, clear and transparent, and the record ethanol is 120ml. Weigh 0.1124g of potassium persulfate solid powder and add it to the mixed solution, place the beaker in a water bath, set the temperature to 70°C and turn on the magnetic stirring button (the stirring speed is suitable, ~300rmp), and the reaction time is controlled at 6-7 hours. After the reaction was completed, the steam was distilled for 1h. Under stirring, the emulsion is cooled naturally, and the target product can be obtained by cen...

Embodiment 3

[0063] The method for preparing monodisperse polystyrene microspheres in this embodiment comprises the following steps:

[0064] Measure 4.6ml of purified styrene monomer and 100ml of double-distilled water into a 250mL three-necked flask, place the beaker in an ultrasonic instrument (set the ultrasonic power to 99%, and set the ultrasonic time to 30min), and add isopropyl Alcohol (the selected isopropanol specification is analytically pure, content ≥ 99.7%) until the mixed solution becomes uniform, clear and transparent, and the record isopropanol is 90ml. Weigh 0.1052g of potassium persulfate solid powder and add it to the mixed solution, place the beaker in a water bath, set the temperature to 70°C and turn on the magnetic stirring button (the stirring speed is suitable, ~300rmp), and the reaction time is controlled at 6-7 hours. After the reaction was completed, the steam was distilled for 1h. Under stirring, the emulsion is cooled naturally, and the target product can be...

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Abstract

The invention discloses a preparation method of monodisperse polystyrene microspheres. The method comprises the following steps: under the condition of ultrasonic, adding small molecular alcohol to disperse styrene in secondary distilled water, so as to form a uniform and transparent mixed solution; adding an initiator, stirring and reacting to obtain a target product. The prepared product can bewidely used in the light industry market or powdery and emulsion cosmetics. Compared with the prior art, the polystyrene microsphere prepared by the method has high monodispersity, has highly controllable particle size, and is prepared through one-pot method reaction; the preparation method is simple, the product can be prepared in batch, the reaction process uses no stabilizer, and the synthesisprocess is environmentally friendly.

Description

technical field [0001] The invention belongs to the technical field of soap-free emulsion polymerization, and relates to a monodisperse polystyrene microsphere and a preparation method and application thereof. Background technique [0002] Emulsion polymerization is a reaction in which the monomer is dispersed in water to form an emulsion with the help of an emulsifier and mechanical stirring, and then an initiator is added to initiate the polymerization of the monomer. It is an important preparation method for the synthesis of polymer materials. Its advantages are: (1) the polymerization speed is fast, and the molecular weight of the product is high; (2) water is used as a dispersant medium, which is beneficial to heat transfer and temperature control; (3) after the reaction reaches a high conversion rate, the viscosity of the emulsion polymerization system is still very low, The dispersion system is stable, easy to control and realize continuous operation, etc. However, i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F112/08B01J13/14
CPCB01J13/14C08F112/08
Inventor 马士禹相雪晨郑桂华陈宁陈喆施婷婷
Owner EAST CHINA NORMAL UNIV
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