Method for preparing monodisperse polymer microsphere by irradiation polymerization of ultraviolet light

A polymer microsphere, monodisperse technology, applied in the field of preparation of functional polymer microspheres, can solve the problems of unfavorable energy saving, long reaction time, high temperature conditions, etc.

Active Publication Date: 2011-04-13
广州五行材料科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, the synthesis of polymer microspheres generally requires higher temper...

Method used

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  • Method for preparing monodisperse polymer microsphere by irradiation polymerization of ultraviolet light
  • Method for preparing monodisperse polymer microsphere by irradiation polymerization of ultraviolet light
  • Method for preparing monodisperse polymer microsphere by irradiation polymerization of ultraviolet light

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Experimental program
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Effect test

Embodiment 1

[0019] Dissolve 0.3 g of initiator 2,2-dimethoxy-2-phenylacetophenone in 70 mL of ethanol, and dissolve 0.7 g of styrene single-terminated polyisopropylacrylamide in 30 mL of water. Mix together 10g of solid styrene, place in a glass reactor, and seal it with nitrogen gas for 15 minutes while stirring; -2 mw / cm 2 Under the irradiation reaction for 24 hours; the obtained product was centrifuged and dried to obtain monodisperse polystyrene microspheres with a particle size of 320 nm and a yield of 90%. The particle size and morphology are shown in figure 1 SEM photographs.

Embodiment 2

[0021] Dissolve 0.6g of 2,2-dimethoxy-2-phenylacetophenone in 70mL of ethanol, 2.0g of styrene single-terminated polyisopropylacrylamide in 30mL of water, and the two are mixed with monomer styrene 10g were mixed together, placed in a glass reactor, and sealed with nitrogen gas for 15 minutes while stirring; under the ultraviolet radiation intensity of 3.4 mw / cm 2 Under the irradiation reaction for 30 minutes; the obtained product was centrifuged and dried to obtain monodisperse polystyrene microspheres with a particle size of 428 nm and a yield of 85%. The particle size and morphology are shown in figure 2 SEM photographs.

Embodiment 3

[0023] Dissolve 0.5g of 2,2-dimethoxy-2phenylacetophenone in 70mL of ethanol, and dissolve 3.0g of methacrylic acid single-capped polyethylene glycol in 30mL of water. Mix 10 g of esters together, put them into a glass reactor, and pass nitrogen gas for 15 minutes while stirring; 2 Under irradiation for 30 minutes; the resulting product was centrifuged and dried to obtain polymethyl methacrylate microspheres with a yield of 90%, and its particle size and shape were as follows: image 3 SEM photographs.

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Abstract

The invention relates to a method for preparing a monodisperse polymer microsphere by irradiation polymerization of ultraviolet light, belonging to the technical field of functional polymer microsphere preparation. In the method, an alkene monomer, a reactive macromolecule dispersion stabilizer and a photoinitiator are taken as raw materials, and polymerization is carried out on the raw materials in a mixed solvent of alcohol and water by the ultraviolet radiation to obtain the monodisperse polymer microsphere; the proportion of the raw materials is as follows: the dosage of the alkene monomer is 5-30g, the dosage of the reactive macromolecule dispersion stabilizer is 0.5-10g, the dosage of the photoinitiator is 0.2-1g and the dosage of the mixed solvent of alcohol and water is 100mL; and the reaction is initiated by the ultraviolet irradiation after the system is evenly mixed to obtain the monodisperse polymer microsphere. By using the method provided by the invention, the monodisperse polymer microsphere is obtained at normal temperature, the reaction energy consumption is low, the reaction speed can be regulated between dozens of minutes and dozens of hours, the diameter of particles of the polymer microsphere is controllable within the range of 100-800nm, and the surface of the microsphere has functional polymer chains.

Description

technical field [0001] The invention discloses a method for preparing monodisperse macromolecular microspheres through ultraviolet light irradiation polymerization, and belongs to the technical field of preparation of functional macromolecular microspheres. Background technique [0002] Polymer microspheres have the characteristics of large specific surface area and controllable particle size, and can be structurally designed according to the needs of use. By introducing branched chains with functional groups, they can be used to load biocompatible polymer microspheres or metals. Nanoparticles have broad application prospects in drug molecule loading, microelectronics, catalyst carrier, light chemical industry and other fields. At present, relatively high temperature conditions are generally required for the synthesis of polymer microspheres, and the reaction time is long, which is not conducive to energy saving. Initiated by ultraviolet light, the activation energy of the ...

Claims

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Application Information

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IPC IPC(8): C08F112/08C08F120/14C08F118/08C08F2/48C08F2/20
Inventor 熊万兵陈明清倪忠斌刘燕储鸿刘士民
Owner 广州五行材料科技有限公司
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