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Method for preparing mono-disperse loose porous acrylonitrile/methyl acrylate copolymer microspheres

A methyl acrylate, loose and porous technology, which is applied in the preparation of acrylonitrile/methyl acrylate copolymer microspheres and the preparation of monodisperse loose porous microspheres, achieving the effect of simple and easy preparation method

Inactive Publication Date: 2009-12-09
LUDONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

And most of the above synthetic methods need to add porogens to obtain porous polymer microspheres.

Method used

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  • Method for preparing mono-disperse loose porous acrylonitrile/methyl acrylate copolymer microspheres
  • Method for preparing mono-disperse loose porous acrylonitrile/methyl acrylate copolymer microspheres
  • Method for preparing mono-disperse loose porous acrylonitrile/methyl acrylate copolymer microspheres

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] Add 0.012 grams of polyvinyl alcohol, 2.5 milliliters of Span 80, 32.2 grams of acrylonitrile, 7.6 grams of methyl acrylate, and 0.11 grams of potassium persulfate into 16 milliliters of deionized water, raise the temperature to 68 degrees Celsius, adjust the stirring rate to 400 rpm, and suspend State emulsion polymerization, reacted for 2 hours, the product was cooled, separated, extracted by Soxhlet extractor for 24 hours, and dried in vacuum to obtain monodisperse porous acrylonitrile / methyl acrylate copolymer microspheres.

[0013] The average particle diameter of the obtained copolymer microspheres was 921.6 microns. Scanning electron micrographs of the microspheres and their anatomical surfaces and interiors are shown in figure 1 , figure 2 and image 3 shown.

Embodiment 2

[0015] Add 0.014 grams of polyvinyl alcohol, 2.5 milliliters of Span 80, 24.2 grams of acrylonitrile, 5.7 grams of methyl acrylate, and 0.24 grams of potassium persulfate into 18 milliliters of deionized water, raise the temperature to 62 degrees Celsius, adjust the stirring rate to 500 rpm, and suspend State emulsion polymerization, reacted for 4 hours, the product was cooled, separated, extracted by Soxhlet extractor for 24 hours, and dried in vacuum to obtain monodisperse porous acrylonitrile / methyl acrylate copolymer microspheres.

[0016] The obtained copolymer microspheres had an average particle diameter of 455.2 microns, good monodispersity and loose porosity.

Embodiment 3

[0018] Add 0.016 grams of polyvinyl alcohol, 2.5 milliliters of Span 80, 32.2 grams of acrylonitrile, 7.6 grams of methyl acrylate, and 0.11 grams of potassium persulfate into 16 milliliters of deionized water, raise the temperature to 68 degrees Celsius, adjust the stirring rate to 600 rpm, and suspend State emulsion polymerization, reacted for 2 hours, the product was cooled, separated, extracted by Soxhlet extractor for 24 hours, and dried in vacuum to obtain monodisperse porous acrylonitrile / methyl acrylate copolymer microspheres.

[0019] The average particle diameter of the obtained copolymer microspheres is 350.6 microns, and the monodispersity and loose porosity are good.

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Abstract

The invention discloses a method for preparing mono-disperse loose porous acrylonitrile / methyl acrylate copolymer microspheres, which is characterized by comprising the following steps: adding a polyvinyl alcohol dispersant, Span 80 emulsifier, an acrylonitrile and methyl acrylate monomer and a potassium persulfate initiator into deionized water, polymerizing the mixture for certain time, then cooling and separating a polymerized product, extracting the product by a Soxhlet extractor, and drying the product in vacuum to obtain the mono-disperse loose porous acrylonitrile / methyl acrylate copolymer microspheres. By means of the preparation method disclosed by the invention, the loose porous acrylonitrile / methyl acrylate copolymer microspheres with good mono-disperse property and particle size range of 100 to 1,000 micrometers can be obtained, and can be applied in the fields of biomedicine, ion exchange resin, pollution control, solid polymer electrolyte, filtration, adsorption and separation.

Description

technical field [0001] The invention relates to a preparation method of acrylonitrile / methyl acrylate copolymer microspheres, in particular to a preparation method of monodisperse loose porous microspheres, belonging to the field of functional polymer materials. Background technique [0002] The polarity and activity of the nitrile group in the polymer chain of polyacrylonitrile enables it to interact physically or chemically with many small molecular compounds, and is used in biomedicine, superabsorbent resins, ion exchange resins, pollution control, antibacterial and deodorizing, Solid polymer electrolyte and filtration and adsorption separation. The preparation of easy-to-process loose and porous polyacrylonitrile microspheres has become an important research topic in the field of polymer material synthesis. Acrylonitrile homopolymer has good processability and electrochemical stability. However, due to the interaction between adjacent nitrile groups, the resistance to r...

Claims

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Application Information

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IPC IPC(8): B01J13/02C08F220/44
Inventor 陈厚刘欣曲荣君王春华纪春暖孙昌梅
Owner LUDONG UNIVERSITY
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