Method for preparing magnetic aerogel adsorption material by using Pickering-high-internal-phase emulsion template method

A technology of high internal phase emulsion and adsorption material, applied in the field of preparation of magnetic aerogel adsorption material, can solve problems such as secondary pollution of water body

Inactive Publication Date: 2016-02-03
LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Traditional high-internal-phase emulsions are used to prepare porous materials by using surfactants to stabilize the emulsion, but a small amount of surfactants remaining in the porous adsorption materials will cause secondary pollution to the water body

Method used

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  • Method for preparing magnetic aerogel adsorption material by using Pickering-high-internal-phase emulsion template method
  • Method for preparing magnetic aerogel adsorption material by using Pickering-high-internal-phase emulsion template method
  • Method for preparing magnetic aerogel adsorption material by using Pickering-high-internal-phase emulsion template method

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Experimental program
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Effect test

Embodiment 1

[0045] 0.1g chitosan, 1.5g acrylamide, 1.5g acrylic acid, 2.2g N,N' -Methylenebisacrylamide, 0.3g modified Fe 3 o 4 , 1.5g of fatty alcohol polyoxyethylene ether surfactants were dispersed in 10mL of water; after each component was dissolved, 30mL of cyclohexane was added to the mixed solution and stirred for 4h, and 0.5g of initiator potassium persulfate was added, stirred for 5min; Pickering-high internal phase emulsion was filled into a columnar tube, sealed, and polymerized at 50°C for 12h. The obtained polymer was Soxhlet-extracted with acetone for 48 hours, dehydrated with industrial ethanol, and dried in vacuum to obtain a magnetic airgel adsorption material. The adsorption material for the heavy metal Cd 2+ and Pb 2+ The desorption amounts of 215mg / g and 486mg / g respectively.

Embodiment 2

[0047] Under stirring at 1200rpm, 0.3g chitosan, 2.0g 2-acrylamide-2-methyl-propanesulfonic acid, 1.5g acrylic acid, 1.0g ethylene glycol dimethacrylate, 0.6g modified Fe 3 o 4 , 1.0g of sorbitol fatty acid ester surfactant and 0.5g of polyoxyethylene and polyoxypropylene block copolymer surfactant were dispersed in 10mL of water; after each component was dissolved, 40mL of liquid paraffin was added dropwise to the mixed solution Stir for 2 hours, add 0.6 g of initiator ammonium persulfate, and stir for 5 minutes; the obtained Pickering-high internal phase emulsion is put into a columnar tube, sealed, and polymerized at 40°C for 24 hours. The obtained polymer was Soxhlet-extracted with n-hexane for 12 hours, dehydrated with industrial ethanol, and dried in vacuum to obtain a magnetic airgel adsorption material. The adsorption material for heavy metal Cu 2+ and Pb 2+ The desorption amounts of the desorbents were 270mg / g and 665mg / g, respectively.

Embodiment 3

[0049] Mix 1.0g chitosan, 3.0g methacrylic acid, 2.5g trimethylolpropane trimethacrylate, 1.5g modified Fe under stirring at 800rpm 3 o 4 , 2.0g of alkylphenol polyethylene oxide ether surfactants were dispersed in 15mL of water; after each component was dissolved, 55mL of p-xylene was added dropwise to the mixed solution and stirred for 3h, and 0.9g of initiator ammonium persulfate was added, Stir for 5 minutes; the resulting Pickering-high internal phase emulsion was put into a columnar tube, sealed, and polymerized at 50°C for 20 hours. The obtained polymer was Soxhlet-extracted with industrial ethanol for 24 hours, dehydrated with industrial ethanol, and dried in vacuum to obtain a magnetic airgel adsorption material. The adsorption material for the heavy metal Cd 2+ and Pb 2+ The desorption amounts of 282mg / g and 712mg / g respectively.

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Abstract

The invention discloses a method for preparing a magnetic aerogel adsorption material by using a Pickering-high-internal-phase emulsion template method and belongs to the technical field of high molecular materials. According to the method, water is used as a continuous phase and an organic solvent is used as an organic dispersion phase; modified Fe3O4 magnetic particles are used as an emulsion stabilizer and a non-ionic surfactant is used as an emulsion auxiliary stabilizer; polymerizable functional monomers are grafted on natural macromolecular chitosan; in the presence of an initiator and a cross-linking agent, a polymerization reaction is carried out to prepare the aerogel adsorption material. The magnetic aerogel adsorption material prepared by the invention contains abundant pore channel structures and functional radicals; an adsorption speed and an adsorption capacity on heavy metal are effectively and remarkably improved; the magnetic aerogel adsorption material has very good magnetic separation and repeatable utilization performances and can be used for recycling and utilizing heavy metal and rare disperse ions in a water body and soil.

Description

technical field [0001] The invention relates to a method for preparing a magnetic airgel adsorption material, in particular to a method for preparing a magnetic airgel adsorption material by using a Pickering-high internal phase emulsion template method, and belongs to the technical field of polymer materials. Background technique [0002] Heavy metal pollution cannot be purified by physical, chemical or biological means in nature itself, but enters animals and plants through air, water, soil and other channels, and enters the human body through food chain amplification and enrichment, thus endangering human health. With the development of my country's industrialization, water and soil heavy metal pollution has become a difficult point of treatment. [0003] Two basic approaches are adopted for the remediation and treatment of heavy metal pollution in water: one is to reduce the bioavailability and migration capacity of heavy metals in water bodies; the other is to completel...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/28B01J20/06B01J20/30
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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