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A kind of polystyrene microsphere with rough surface and its preparation method and application

A technology for polystyrene microspheres and rough surface, applied in the field of polystyrene microspheres and their preparation, can solve the problems of reducing the water resistance, solvent resistance and mechanical properties of polymer products, and increasing the difficulty of emulsifiers in processing, and achieves The surface is rough and uniform, the toxicity is low, and the effect of a wide range of applications

Active Publication Date: 2021-02-26
EAST CHINA NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are many problems in traditional emulsion polymerization. For example, the addition of emulsifiers will increase the difficulty of post-processing, and will reduce the water resistance, solvent resistance and mechanical properties of polymer products.

Method used

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  • A kind of polystyrene microsphere with rough surface and its preparation method and application
  • A kind of polystyrene microsphere with rough surface and its preparation method and application
  • A kind of polystyrene microsphere with rough surface and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0081] In this embodiment, the mixed solution is diluted to about 0 times, and the method comprises the following steps:

[0082] Measure 10ml of the mixed solution in a 250ml conical flask, use about 1.3ml of the mixed solution of ethanol and water and initiator K 2 S 2 o 8 0.0063g is made into a solution, and about 0.5ml of the mixture of ethanol and water is mixed with the reducing agent NaHSO 3 0.0044g was made into a solution, and the two solutions were quickly added to the above-mentioned Erlenmeyer flask, and placed at a constant temperature of 25°C for 24 hours. After adding ammonium chloride solid powder to the reactant and standing still for 24-48 hours, the target product surface rough polystyrene microspheres can be obtained through the steps of centrifugation, water washing and redispersion. The product was dissolved in ethanol and characterized by TEM. The polystyrene microspheres prepared in this embodiment are as follows: figure 1 As shown in (including a ...

Embodiment 2

[0084] In this embodiment, the mixed solution is diluted to about 5 times, and the method comprises the following steps:

[0085] Measure 10ml of the mixed solution in a 250ml conical flask, use about 30ml of the mixed solution of ethanol and water and initiator K 2 S 2 o 8 0.03123g is made into a solution, with about 10ml of ethanol and water mixture and reducing agent NaHSO 3 0.0202 g was made into a solution, and the two solutions were quickly added to the above-mentioned Erlenmeyer flask, and placed at a constant temperature of 25°C for 24 hours. Add ammonium chloride solid powder to the reactant and let it stand for 24-48 hours, then centrifuge / wash with water to obtain the target product. The product was dissolved in ethanol and characterized by TEM. The polystyrene microspheres prepared in this embodiment are as follows: figure 2 As shown in (including a and b), it can be seen in the figure that the surface of each particle is rougher and more irregular than the p...

Embodiment 3

[0087] In this embodiment, the mixed solution is diluted to about 10 times, and the method comprises the following steps:

[0088] Measure 10ml of the mixed solution in a 250ml conical flask, use about 65ml of the mixed solution of ethanol and water and initiator K 2 S 2 o 8 0.0632g is made into a solution, with about 25ml of a mixture of ethanol and water and a reducing agent NaHSO 3 0.0410 g was made into a solution, and the two solutions were quickly added to the above-mentioned Erlenmeyer flask, and placed at a constant temperature of 25°C for 24 hours. Add ammonium chloride solid powder to the reactant and let it stand for 24-48 hours, then centrifuge / wash with water to obtain the target product. The product was dissolved in ethanol and characterized by TEM. The polystyrene microspheres prepared in this embodiment are as follows: image 3 As shown in (including a and b), it can be seen in the figure that the surface of each particle is rougher and more irregular than...

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Abstract

The invention discloses a method for preparing polystyrene microspheres with uniform surface roughness. Under stirring conditions, styrene is dispersed in water, and then small molecule alcohol is added to form a uniform and transparent mixed solution; the mixed solution is diluted with alcohol-water mixed solution according to different multiples, and a certain amount of composite initiator (K 2 S 2 o 8 ‑NaHSO 3 ) was quickly added to the above reaction solution, and mixed. The obtained mixed solution was placed at 25°C for 18-24 hours of constant temperature reaction, and the target product could be obtained after separation and purification. The product prepared by the invention can be widely used in medicine, gene transfer carrier, vaccine adjuvant, cancer diagnosis and treatment and the like. Compared with the prior art, the present invention uses a one-pot method to prepare rough polystyrene microspheres with uniform particle size and concave surface. The preparation method is simple, the product can be prepared in batches, no stabilizer is needed in the reaction process, and the synthesis process is environmentally friendly.

Description

technical field [0001] The invention belongs to the technical field of soap-free emulsion polymerization, and relates to a rough-surfaced polystyrene microsphere, 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, th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F112/08C08F2/22B01J13/14
CPCB01J13/14C08F2/22C08F112/08
Inventor 马士禹相雪晨施婷婷郑桂华陈喆陈宁任东方
Owner EAST CHINA NORMAL UNIV
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