Preparation method of functional hollow polymer microspheres

A polymer and functional technology, applied in the field of hollow polymer microspheres and its preparation, can solve problems such as complex preparation process

Active Publication Date: 2014-02-05
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] This method can overcome the shortcomings of conventional preparation methods to a certain extent, and the prepared hollow polymer microspheres have anhydride functional groups, but the preparation process is still relatively complicated, especially the PMV template particles need to be purified to thoroughly Elution of unreacted vinyl acetate monomer

Method used

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  • Preparation method of functional hollow polymer microspheres
  • Preparation method of functional hollow polymer microspheres
  • Preparation method of functional hollow polymer microspheres

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0075] Example 1 (see Table 1 for specific monomer ratios, solvents, and initiator formulations)

[0076] Add 2.15g of monomer vinyl acetate, 4.90g of maleic anhydride, and 0.070g of AIBN initiator into the reaction flask, add 25mL of butyl acetate to dissolve, stir, mix well, and pass nitrogen gas for 30 minutes to remove dissolved oxygen. After that, the reaction system gradually The temperature was raised to the reaction temperature of 75°C, and the condenser condensed and refluxed. After reacting to the set time, stop heating, and obtain monodisperse PMV copolymer microsphere 1# after cooling. For styrene, 1.30g of monomer styrene, 2.45g of maleic anhydride, and 0.040g of AIBN initiator were added to the reaction flask, and 25mL of isoamyl acetate was added to dissolve and stir, and after mixing evenly, pass nitrogen for 30 minutes to remove dissolved oxygen. Afterwards, the temperature of the reaction system was gradually raised to the reaction temperature of 75° C., and...

Embodiment 2

[0083] Cool the suspension dispersion system of monodisperse PMV microsphere 1# to 30°C, start stirring to disperse PMV polymer microspheres evenly in the system, add 12.5mL n-heptane, MAH 2.45g and DVB 2.3g under stirring condition Add 0.025g of BPO initiator to the above-mentioned PMV dispersion liquid, dissolve and disperse evenly, and add 0.025g of BPO initiator to the above-mentioned reaction system. The temperature of the reaction system is gradually raised to 85°C, and the polymerization is kept at a constant temperature for 3 hours to obtain PMV particles as the core and DVB-MAH as For the core-shell polymer particles of the cross-linked shell layer, add 50 mL of solvent acetone to the dispersion system of the above-mentioned core-shell polymer particles, stir for 30 minutes, centrifuge, and dry to obtain the DVB-MAH hollow polymer microspheres of the present invention. The core-shell ratio of the hollow polymer microsphere is 1:1 (specifically refers to the mass ratio ...

Embodiment 3

[0085] Cool the suspension dispersion system of monodisperse PMV microspheres 2# to 30°C, start stirring to disperse the PMV polymer microspheres evenly in the system, and mix 12.5mL of n-hexane and 0.675mL of 1,4-butadiene under stirring conditions. g is added to the PMV dispersion liquid, after the dispersion is uniform, 0.0150 g of AIBN initiator is added to the above reaction system, the temperature of the reaction system is gradually raised to 75 ° C, and the polymerization is kept at a constant temperature for 3 hours to obtain PMV particles as the nucleus, butadiene- Maleic anhydride is the core-shell polymer particle of the cross-linked shell layer, and the monomer conversion rate is above 99%; 50 mL of solvent acetone is added to the dispersion system of the above-mentioned core-shell polymer particle, stirred for 30 minutes, centrifuged, and dried to obtain The butadiene-maleic anhydride hollow polymer microsphere of the present invention has a core-shell ratio of 1:1...

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Abstract

The invention discloses a preparation method of functional hollow polymer microspheres. The shell of the functional hollow polymer microspheres is prepared by carrying out precipitation polymerization on a functional monomer and a crosslinking agent in different ratios; and the formed crosslinked shell has a mesoporous structure. The preparation method comprises the following steps: preparing a monodisperse polymer microsphere template by self-stabilization precipitation polymerization; directly adding the reaction system into the shell without separation to form the required functional monomer and crosslinking agent, and preparing core-shell polymer microspheres of which the shell has a crosslinked mesoporous structure by precipitation polymerization; and finally, removing the polymer microsphere core by solvent dissolution to obtain the functional hollow polymer microspheres. The technique is simple, and safe and convenient to operate, has the advantages of mild reaction conditions, no need of special equipment, high preparation efficiency, easy microsphere separation, controllable size, and very high functional group content in the polymer microspheres, and lays a foundation for large-scale industrial production of the functional hollow polymer microspheres.

Description

technical field [0001] The invention belongs to the field of functional polymer materials, and in particular relates to a hollow polymer microsphere with excellent functionality and a preparation method thereof. The method can be used to prepare the core-shell polymer microspheres whose shell is a cross-linked mesoporous structure, and the shell contains a large amount of functional groups such as anhydride, imide or carboxylate, and dissolve the The core of the prepared functional core-shell polymer microspheres is removed to form functional hollow polymer microspheres. technical background [0002] Hollow polymer microspheres are a class of polymer materials with unique morphology and structure. They have one or more cavities inside, so they have the characteristics of low density, high specific surface area, and unique optical properties. As a new type of functional material, they have broad applications. Application prospect, it can be used for the protection, embedding...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F212/08C08F222/06C08F222/08C08F212/36C08F218/08C08F236/06C08F212/14C08F236/08C08F222/14C08F222/20C08F2/06C08F8/12C08F8/32C08J9/26B01J13/14B01J20/26B01J20/28B01J20/30
Inventor 杨万泰陈冬马育红赵长稳
Owner BEIJING UNIV OF CHEM TECH
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