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Preparation method of porous polymer microsphere

A technology of porous microspheres and polymers, which is applied in the field of preparation of high-efficiency polymer porous microspheres, can solve the problems of complex preparation process and high time cost, and achieve the effects of simplifying the preparation process, reducing preparation cost and good versatility

Active Publication Date: 2016-07-13
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the above preparation methods, most of them start from the direction of controllable particle size to prepare monodisperse porous polymer microspheres. The preparation process is more complicated and the time cost is relatively large. small amount of porous polymer microspheres

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Example 1: The preparation method of the novel high-efficiency porous polystyrene microspheres, the specific steps are as follows:

[0021] (1) Put 30.0g of polystyrene in a beaker, and make 10% polystyrene dichloromethane solution with 270.0g of methylene chloride. After the polystyrene is completely dissolved, add 15.0 g of n-heptane g, after stirring, obtain a mixed homogeneous solution;

[0022] (2) Add 300.0g of distilled water and 3.0g of polyvinyl alcohol (1788) into the reactor with heating device, stirrer and foam outlet, heat and stir until the polyvinyl alcohol is completely dissolved, then lower the system temperature to 19.0°C , add step (1) polymer solution 150.0g to the system;

[0023] (3) Adjust the stirring speed to 400rpm / min and keep it constant, raise the temperature at a rate of 5.0°C / min, collect foam while raising the temperature, when the temperature reaches 40.0°C, stop heating and keep it for 30min, and then increase the temperature at 3.0°...

Embodiment 2

[0025] Example 2: The preparation method of novel high-efficiency porous methyl methacrylate-maleic anhydride-vinyl acetate copolymer microspheres, the specific steps are as follows:

[0026] (1) Take 30.0g of methyl methacrylate-maleic anhydride-vinyl acetate copolymer in a beaker, and 570.0g of chloroform to prepare methyl methacrylate-maleic anhydride- Vinyl acetate chloroform solution, after the methyl methacrylate-maleic anhydride-vinyl acetate copolymer is completely dissolved, add 30.0 g of dimethyl carbonate, and stir to obtain a uniform solution;

[0027] (2) Add 150.0g of distilled water and 7.5g of polyvinyl alcohol (1788) into the reactor with heating device, stirrer and foam outlet, heat and stir until the polyvinyl alcohol is completely dissolved, then lower the system temperature to 40°C , add step (1) polymer solution 150.0g to the system;

[0028] (3) Adjust the stirring speed to 200rpm / min and keep it constant, raise the temperature at a rate of 3.0°C / min,...

Embodiment 3

[0030] Example 3: The preparation method of novel high-efficiency porous ethyl acrylate-sodium allyl sulfonate copolymer microspheres, the specific steps are as follows:

[0031] (1) Take 30.0g of ethyl acrylate-sodium allyl sulfonate copolymer and put it in a beaker, and make 120.0g of ether into ether solution of ethyl acrylate-sodium allyl sulfonate copolymer with a concentration of 20% by mass. After the ethyl acrylate-sodium allyl sulfonate copolymer is completely dissolved, add 45.0 g of n-hexane, and stir to obtain a uniformly mixed solution;

[0032] (2) Add 1500.0g of distilled water and 7.5g of polyvinyl alcohol (1788) to the reactor with heating device, stirrer and foam outlet, heat and stir until the polyvinyl alcohol is completely dissolved, then lower the system temperature to 12.0°C , add step (1) polymer solution 150.0g to the system;

[0033] (3) Adjust the stirring speed to 600rpm / min and keep it constant, raise the temperature at a rate of 0.5°C / min, coll...

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PUM

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Abstract

The invention discloses a preparation method of a porous polymer microsphere. The preparation method comprises the following steps of: firstly dissolving a polymer by adopting a good low boiling point polymer organic solvent, then adding a poor high boiling point polymer organic solvent, and stirring to obtain uniform solution; then adopting a suspension dispersion method for dispersing the polymer solution into a water phase system to form micro-droplets, gradually raising temperature, volatilizing the good low boiling point polymer solvent and producing a large amount of foams in the water phase system, enabling a large amount of micro-droplets to be wrapped in the foams, collecting ascending foams, washing the foams into hot water bath containing a stirring device with hot water, and separating from the poor high boiling point organic solvent while the good low boiling point organic solvent is volatilized, so that the porous polymer microsphere is obtained. The polymer microsphere has good mechanical, optical, thermal insulation and sound insulation properties and can be widely applied to the fields of loading of catalyst, medicines, cosmetics, coating, papermaking, leather, communication and the like.

Description

technical field [0001] The invention relates to a preparation method of high-efficiency polymer porous microspheres, belonging to the field of polymer functional materials. Background technique [0002] Due to its porous structure, porous polymer microspheres have some special properties, such as high specific surface area, good light scattering, low density, thermal insulation, acoustic insulation, etc. It can be widely used in catalyst loading, pharmaceuticals, acid mist suppression, oil drilling, cosmetics, coatings, papermaking, leather and other fields. [0003] At present, the traditional methods for preparing porous polymer microspheres mainly include: suspension polymerization method, acid-base swelling method, self-assembly method, distillation precipitation method, etc., combined with extraction, dialysis, solvent evaporation, etching, spray drying, vacuum drying and other methods Porous polymer microspheres were prepared. In the above methods for preparing porou...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J9/28C08J3/16C08L25/06C08L33/12C08L33/08C08L33/14C08L25/08
CPCC08J3/16C08J9/28C08J2201/0522C08J2201/0502C08J2325/08C08J2325/06C08J2333/14C08J2333/12C08J2333/08
Inventor 何艳萍郭文锋孙彦琳郭荣鑫祝琳华司甜
Owner KUNMING UNIV OF SCI & TECH
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