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Surface-modified ion-imprinted polymer microspheres and preparation method thereof

An ion imprinting and surface modification technology, applied in alkali metal compounds, chemical instruments and methods, other chemical processes, etc., can solve problems such as poor adsorption effect, achieve good adsorption performance, improve hydrophilic performance, and excellent anti-interference ability. and stability effects

Active Publication Date: 2016-10-12
NANCHANG HANGKONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, although the ion-imprinted polymers prepared by this preparation method have better selection, the adsorption effect is generally poor.

Method used

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  • Surface-modified ion-imprinted polymer microspheres and preparation method thereof
  • Surface-modified ion-imprinted polymer microspheres and preparation method thereof
  • Surface-modified ion-imprinted polymer microspheres and preparation method thereof

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preparation example Construction

[0041] The invention provides a method for preparing surface-modified ion-imprinted polymer microspheres, comprising the following steps:

[0042] Carrying out the grafting reaction of the hydrophilic monomer, the first initiator, the first chain transfer agent and the ion-imprinted polymer microsphere under the condition of the first organic solvent to obtain the surface-modified ion-imprinted polymer microsphere;

[0043] The temperature of the grafting reaction is 60-90°C;

[0044] The time of the grafting reaction is 8-48 hours.

[0045] In the invention, the hydrophilic monomer, the first initiator, the first chain transfer agent and the ion-imprinted polymer microsphere are subjected to grafting reaction under the condition of the first organic solvent to obtain the surface-modified ion-imprinted polymer microsphere. In the present invention, the hydrophilic monomer is preferably 2-hydroxyethyl methacrylate, methacrylic acid, N-isopropylacrylamide, methyl methacrylate a...

Embodiment 1

[0077] 0.09g of LiCl·H 2O, 0.369g allyloxy-12-crown-4, 1.485g ethylene glycol dimethacrylate (EGDMA), 0.064g AIBN and 0.179g cumyl thiobenzoate were dissolved in a volume concentration of 80 % methanol aqueous solution, blow nitrogen for 30min, and react at 65°C water bath temperature for 24h.

[0078] After the reaction, the reaction product was filtered, rinsed three times with 80% methanol aqueous solution, and washed three times with 1 mol / L nitric acid to elute the template ions from the polymer microspheres. Vacuum drying at 40° C. and 0.08 MPa for 24 hours gave pink ion-imprinted polymer microspheres.

[0079] 500 mg of ion-imprinted polymer microspheres obtained above, 5.85 g of 2-hydroxyethyl methacrylate, 25 mg of cumyl thiobenzoate, and 6 mg of azobisisobutyronitrile were sequentially added into 50 mL of methanol. React at 65°C and 0.08MPa for 24h. After the reaction system was centrifuged, the obtained solid product was thoroughly washed with methanol until no w...

Embodiment 2

[0090] 0.855g of CdCl 2 2.5H 2 O, 0.260g of 3-allyl rhodanine, 1.573g of trimethylolpropyl trimethacrylate (TRIM), 0.064g of AIBN and 0.183g of cumylthiobenzoate are dissolved in a volumetric concentration of 80 % methanol aqueous solution, blow nitrogen for 30min, and react for 48h at the water bath temperature of 90°C.

[0091] After the reaction, the reaction product was filtered, rinsed three times with 80% aqueous methanol and three times with 1 mol / L hydrochloric acid to elute the template ions from the polymer microspheres. Vacuum drying at 40° C. and 0.06 MPa for 24 hours gave pink ion-imprinted polymer microspheres.

[0092] 500 mg of the ion-imprinted polymer microspheres obtained above, 2.93 g of methacrylic acid, 25 mg of cumyl thiobenzoate, and 6 mg of azobisisobutyronitrile were sequentially added into 50 mL of methanol. React at 85°C and 0.06MPa for 24h. After the reaction system was centrifuged, the obtained solid product was thoroughly washed with methanol...

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Abstract

The invention discloses a preparation method of surface-modified ion-imprinted polymer microspheres. The method comprises the following step: carrying out grafting reaction on a hydrophilic monomer, a first initiator, a first chain-transfer agent and ion-imprinted polymer microspheres in a first organic solvent to obtain surface-modified ion-imprinted polymer microspheres, wherein the grafting reaction temperature is 60-90 DEG C, and the grafting reaction time is 8-48 hours. The hydrophilic monomer is grafted to the surface of the ion-imprinted polymer microspheres, thereby enhancing the hydrophilicity of the surface-modified ion-imprinted polymer microspheres. The experimental result of the embodiment of the invention indicates that the contact angle of the surface-modified ion-imprinted polymer microspheres is 98.44 degrees, so the surface-modified ion-imprinted polymer microspheres are hydrophilic. Besides, the obtained surface-modified ion-imprinted polymer microspheres have excellent antijamming ability and stability.

Description

technical field [0001] The invention relates to the technical field of metal ion adsorption materials, in particular to a surface-modified ion-imprinted polymer microsphere and a preparation method thereof. Background technique [0002] In recent years, with the rapid development of the economy, a large amount of substances containing metal elements have been consumed, and these metal elements eventually enter the water environment with industrial water. Due to the high toxicity and persistence of metal ions, which are easy to cause cancer, the removal and recovery of metal ions in the process of industrial discharge has become an urgent problem to be solved. [0003] At present, the removal methods of metal ions mainly include chemical precipitation, membrane separation, flotation, electrochemical and biological methods. Among them, the adsorption method is a preparation method for effectively removing metal ions in water, and is widely used because of its simple operation...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F265/06C08F220/28C08F220/06C08F220/14B01J20/26B01J20/28
CPCB01J20/265B01J20/268B01J20/28019C08F265/06C08F220/281
Inventor 罗旭彪钟卫萍罗胜联
Owner NANCHANG HANGKONG UNIVERSITY
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