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Method for preparing magnetic porous microsphere adsorbing material by utilizing O/W/O double emulsion template

A technology of porous microspheres and adsorption materials, applied in chemical instruments and methods, adsorption water/sewage treatment, water/sludge/sewage treatment, etc.

Inactive Publication Date: 2016-06-15
LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the method of preparing porous microspheres using O / W / O double emulsion template has not been reported yet.

Method used

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  • Method for preparing magnetic porous microsphere adsorbing material by utilizing O/W/O double emulsion template
  • Method for preparing magnetic porous microsphere adsorbing material by utilizing O/W/O double emulsion template
  • Method for preparing magnetic porous microsphere adsorbing material by utilizing O/W/O double emulsion template

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] Mix 0.1g hydroxypropyl cellulose, 2.0g hydroxyethyl methacrylate, 1.5g itaconic acid, 3.0g ethylene glycol dimethacrylate, 0.2g modified Fe under stirring at 200rpm 3 o 4 , 1.0g of polyoxyethylene alkyl acylation amine surfactant was dispersed in 5mL of water; after each component was dissolved, 10mL of toluene was added to the mixed solution and stirred for 4h, and then 0.5g of initiator benzoyl peroxide was added. Stir at 100rpm for 2min to obtain Pickering-emulsion;

[0050] Add the Pickering-emulsion to 25mL p-xylene (containing 2.5g of polyoxyethylene alkyl acylinolamine surfactant), stir and disperse at 8000rpm for 1min; then put it into a test tube and polymerize at 70°C for 4h; After extraction for 48 hours, vacuum-dry to obtain magnetic porous microsphere adsorption material.

[0051] The adsorption material for heavy metal Cu 2+ and Pb 2+ The desorption amounts of the desorbents were 125mg / g and 203mg / g, respectively.

Embodiment 2

[0053] 0.6g hydroxypropyl cellulose, 1.5g 2-acrylamide-2-methyl-propanesulfonic acid, 2.0g maleic acid, 2.0g N,N' - Methylenebisacrylamide, 0.1g modified Fe 3 o 4 , 1.0 g of alkylphenol polyethylene oxide ether surfactants were dispersed in 3 mL of water; after each component was dissolved, 6 mL of cyclohexane was added to the mixed solution and stirred for 2 h, and then 0.2 g of initiator ammonium persulfate was added, Stir at 100rpm for 1min to obtain Pickering-emulsion;

[0054] Add Pickering-emulsion to 9mL liquid paraffin (containing 0.45g polyoxyethylene polyoxypropylene block copolymer surfactant), stir and disperse at 3000rpm for 2min, then put it into a test tube and polymerize at 40°C for 12h; the obtained polymer acetone Soxhlet extraction for 48 hours, vacuum drying to obtain magnetic porous microsphere adsorption material.

[0055] The adsorption material for heavy metal Cu 2+ and Pb 2+ The desorption amounts of the desorbents were 153mg / g and 388mg / g, respec...

Embodiment 3

[0057] Mix 0.3g hydroxypropyl cellulose, 2.0g methacrylic acid, 1.0g acrylic acid, 0.3g modified Fe under stirring at 800rpm 3 o 4 , 0.15g of fatty alcohol polyoxyethylene ether surfactant was dispersed in 4mL of water; after each component was dissolved, 6mL of p-xylene was added to the mixed solution and stirred for 2h, and 0.3g of initiator azobisisobutyronitrile was added, and Stir for 4 minutes at 100 rpm to obtain Pickering-emulsion;

[0058] Add the Pickering-emulsion to 30mL cyclohexane (containing 6g fatty acid polycycloethylene alkyl ester surfactant), and then stir and disperse at 5000rpm for 2min; then put it into a test tube and polymerize at 70°C for 4h; the obtained polymer n-hexane Soxhlet After extracting for 24 hours and dehydrating with industrial ethanol, the magnetic porous microsphere adsorption material is obtained.

[0059] The adsorption material for heavy metal Cu 2+ and Pb 2+ The desorption amounts of the desorbents were 282mg / g and 378mg / g, resp...

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Abstract

The invention discloses a method for preparing a magnetic porous microsphere adsorbing material by utilizing an oil-water-oil double emulsion template. The method comprises the steps of taking a natural polymer hydroxy propyl cellulose as a matrix, a polymerizable functional monomer as a modifier, water as a continuous phase, an organic solvent as an organic dispersed phase, modified Fe3O4 magnetic particles as an emulsion stabilizer and a nonionic surfactant as an emulsion co-stabilizer, stirring in the presence of an initiator and a cross-linking agent, and obtaining a Pickering emulsion; adding the Pickering-emulsion into the organic solvent containing a surfactant for further emulsification, and then obtaining the magnetic porous microsphere adsorbing material through a polymerization reaction, wherein the diameter of microspheres is within the range of 5 to 20mum. The spherical structure is regular, the surface and the interior of each microsphere contain abundant pore structures and functional groups, the adsorption rate and the adsorption capacity to heavy metal can be remarkably improved, and the magnetic porous microsphere adsorbing material has very good properties of magnetic separation and reuse.

Description

technical field [0001] The invention relates to a method for preparing a magnetic porous microsphere adsorption material, in particular to a method for preparing a magnetic porous microsphere adsorption material by using an O / W / O double emulsion template, and belongs to the technical field of polymer materials. Background technique [0002] With the process of industrialization and urbanization, water pollution, especially water pollution in river basins, has become a major environmental problem restricting social and economic development. According to the Twelfth Five-Year Plan for the Prevention and Control of Heavy Metal Pollution, by 2015, China will establish a relatively complete system for the prevention and control of heavy metal pollution. With the gradual development of the plan, the emission requirements for industrial and mining enterprises are becoming more and more stringent. At the same time, how to effectively restore heavy metals in polluted water has becom...

Claims

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Application Information

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IPC IPC(8): B01J20/30B01J20/28B01J20/26C02F1/28C02F101/20
CPCB01J20/28009B01J20/06B01J20/267B01J20/28019C02F1/281C02F1/285C02F2101/20
Inventor 王爱勤朱永峰宗莉王文波康玉茹
Owner LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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