Method for preparing monodisperse cation type polymer micro-sphere

A cationic and polymer technology, which is applied in the field of preparation of monodisperse cationic polymer microspheres, can solve the problems of narrow application range and small particle size, and achieve the effects of fast nucleation speed, elimination of residue and maintenance of the system

Inactive Publication Date: 2008-03-19
WUHAN INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the particle size of cationic polymer microspheres prepared by emulsion polymerization or soap-free emulsion polymerization is small (<1 μm), and the applicable range is narrow

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Add 1 g of dimethyl diallyl ammonium chloride, 9 g of methyl methacrylate, 1.5 g of polyvinylpyrrolidone K30, 0.1 g of azobisisobutyronitrile, 35 g of deionized water and 65 g of methanol into the reaction In the container, the temperature was raised to 75°C under constant stirring, and the reaction was continued for 4 hours before the reaction was terminated; then the obtained emulsion was washed with methanol and centrifuged three times, and then washed with deionized water and centrifuged three times to obtain a monodisperse Cationic polymer microspheres.

Embodiment 2

[0017] Mix 1 g of methacryloyloxyethyltrimethylammonium chloride, 9 g of methyl methacrylate, 1.5 g of polyvinylpyrrolidone K30, 0.1 g of azobisisobutyronitrile, 35 g of deionized water and 65 g of Add methanol into the reactor, heat up to a constant temperature of 75°C under constant stirring, continue to react for 4 hours and then end the reaction; then wash the obtained emulsion with methanol and centrifuge for three times, then wash with deionized water and centrifuge for three times. Monodisperse cationic polymer microspheres are obtained.

Embodiment 3

[0019] Mix 1 g of methacryloxyethyl dimethyl ammonium chloride, 9 g of methyl methacrylate, 1.25 g of polyvinylpyrrolidone K30, 0.1 g of azobisisobutyronitrile, 35 g of deionized water and 65 g of Add methanol into the reactor, heat up to a constant temperature of 75°C under constant stirring, continue to react for 4 hours and then end the reaction; then wash the obtained emulsion with methanol and centrifuge for three times, then wash with deionized water and centrifuge for three times. Monodisperse cationic polymer microspheres are obtained.

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Abstract

The invention relates to a method of preparing cationic type polymeric microspheres. According to the mass ratio of 0.25 to 3:8 to 12:0.5 to 2.5:0.05 to 0.2:0 to 50:50 to 100, cationic type monomers, vinyl monomers, dispersant, initiator, dispersing medium A and dispersing medium B are added into a reactor and are continuously stirred until temperature is raised to and kept at 75 DEG C, and reaction lasts three to five hours in order to obtain emulsion; the obtained emulsion is washed and centrifugated by methyl alcohol for three times and then is washed and centrifugated by deionized water for three times, so that the monodisperse cationic type polymeric microspheres with a particle diameter between 0.5 to 50 Mu m are produced. The method is characterized in high nucleation speed, easy acquirement of uniformly dispersed cationic type polymeric microspheres, simple technique and no need of nitrogen protection in the course of reaction, and the particle diameter of the microspheres can be controlled by changing the proportion between cationic type monomers and vinyl monomers.

Description

technical field [0001] The invention belongs to the field of microsphere materials, and in particular relates to a preparation method of monodisperse cationic polymer microspheres. Background technique [0002] Functional polymer microspheres with charged surface are widely used in biomedicine, immunology, solid phase carrier, high performance liquid chromatography and other fields, among which cationic polymer microsphere emulsion is widely used as flocculant in printing and dyeing, papermaking, etc. , food, aquatic product processing and fermentation and flocculation treatment of domestic sewage. It has an incomparable role in sewage treatment with anionic and nonionic flocculants. At the same time, cationic polymer microspheres have broad application prospects in electroplating, detection of cell phagocytosis, protein carriers, adhesives and fabric treatment, paper additives, and printing. Therefore, the synthesis of polymer microspheres with positive charges on the sur...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F2/22C08F220/00C08F220/14C08F4/04C08F6/00
Inventor 刘长生朱仕惠韦磊李铭果杨鹏
Owner WUHAN INSTITUTE OF TECHNOLOGY
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