Preparation method for novel three-dimensional ordered macroporous chelating resin

A three-dimensional ordered, chelating resin technology, applied in chemical instruments and methods, other chemical processes, etc., to achieve the effect of improving utilization rate, excellent mechanical properties, and increasing adsorption capacity

Inactive Publication Date: 2010-03-17
HEBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, so far, the application of three-dimensional ordered macroporous materials in

Method used

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  • Preparation method for novel three-dimensional ordered macroporous chelating resin
  • Preparation method for novel three-dimensional ordered macroporous chelating resin
  • Preparation method for novel three-dimensional ordered macroporous chelating resin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Preparation of 3DOM CLPS with average pore size of 80nm connected with 2-mercaptobenzothiazole.

[0044] (1) Preparation of silica colloidal crystal template

[0045] At room temperature, add 10g of absolute ethanol, 5.6g of 25% ammonia water, and 8.9g of distilled water in sequence in a three-necked flask equipped with electric stirring. After stirring evenly, quickly add 15.9g of tetraethyl orthosilicate and react for 8 hours Finally, pour the obtained suspension into a 500mL beaker, the solvent evaporates naturally at room temperature, and then sinter the template in a horse-boiling furnace at 200°C for 2 hours, and slowly lower it to room temperature to obtain silica gel with an average particle size of 80nm. crystal template.

[0046] (2) Preparation of three-dimensional ordered macroporous materials (3DOM)

[0047] After 0.0610mol styrene (6.35g), 0.0285mol (3.71g) divinylbenzene and 0.0503g initiator AIBN are fully dissolved in a 50mL beaker, the mixed solution...

Embodiment 2

[0062] Preparation of 3DOM CLPS with an average pore size of 200nm coupled with 3-aminomethylpyridine.

[0063] (1) Preparation of silica template

[0064] The preparation steps of the silica template refer to Example 1, only the addition of reagents is adjusted: 12 g of absolute ethanol, 6.2 g of ammonia water with a percentage concentration of 25%, 10 g of distilled water, and 14.2 g of tetraethyl orthosilicate. A silica template with an average particle diameter of 200 nm was obtained.

[0065] (2) Preparation of three-dimensional ordered macroporous materials (3DOM)

[0066] After 0.0697mol styrene (7.25g), 0.0214mol divinylbenzene (2.79g) and 0.0502g dibenzoyl peroxide are fully dissolved in a 50mL beaker, the mixture is injected into a two-neck flask filled with a sintered template , soak the template until transparent. Polymerize at 65°C for 2 hours and at 80°C for 24 hours to obtain a three-dimensional ordered polymer / silica composite. The bulk polymer on the surfa...

Embodiment 3

[0077] Preparation of 3DOM CLPS with an average pore size of 460 nm linked to 2-amino-5-methylthio-1,3,4-thiadiazole.

[0078] (1) Preparation of silica template

[0079] The preparation steps of the silica template refer to Example 1, and only the addition of reagents is adjusted: 13.8 g of absolute ethanol, 7.5 g of ammonia water with a percentage concentration of 25%, 12.5 g of distilled water, and 13.8 g of ethyl orthosilicate. A silica template with an average particle diameter of 460 nm was obtained.

[0080] (2) Preparation of three-dimensional ordered macroporous materials (3DOM)

[0081] After 0.0610mol styrene (6.35g), 0.0328mol divinylbenzene (4.27g) and 0.0531g diisopropyl peroxydicarbonate are fully dissolved in a 50mL beaker, the mixture is injected into the two mouths containing the sintered template. In the bottle, soak the template until transparent. Polymerize at 65°C for 2 hours and at 80°C for 24 hours to obtain a three-dimensional ordered polymer / silica...

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Abstract

The invention relates to a high molecular material, in particular to a preparation method for a novel three-dimensional ordered macroporous chelating resin. The technological process comprises the following steps: (1) preparation of a silica colloidal crystal template; (2) preparation of a three-dimensional ordered macroporous material (3DOM); (3) chloromethylation of the 3DOM; (4) controlled grafting of a hydrophilic chain segment by using the 3DOM; (5) esterification of phenylsulfonyl for a PHEMA grafted chain; and (6) accessing chelation groups on the PHEMA grafted chain. The prepared three-dimensional ordered macroporous material is a polymer material, the pores are uniform and ordered, and more than one chelation group is accessed on each chain segment, therefore, the adsorptive capacity of the three-dimensional ordered macroporous chelating resin is far higher than that of other types of resin, and the adsorptive capacity to Hg<2+> is up to 1.96 mmol/g.

Description

technical field [0001] The technical solution of the invention relates to polymer materials, in particular to a method for preparing a three-dimensional ordered macroporous chelating resin for adsorbing precious metal ions in aqueous solution. Background technique [0002] Three-dimensionally ordered macroporous materials (3DOM materials, Three-dimensionally Ordered Macroporous Materials), due to their uniform and orderly distribution of pores, large pore diameter, large specific surface area, high porosity, and special photonic crystal properties and size-dependent effects , so in sensors (Scott R.W.J., Yang S.M., G.Chabanis, et al. Tin Dioxide Opals and Inverted Opals: Near-Ideal Microstructures for Gas Sensors. Adv. Mater., 2001, 13(19): 1468~1472; Qian W.P. , Z.Z.Gu, Fujishima A., et al., Three-Dimensionally Ordered Macroporous Polymer Materials: An Approach for Biosensor Applications. Langmuir, 2002, 18(11): 4526~4529), photonic chips (Ozin G.A., Yang S.M., The Race fo...

Claims

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Application Information

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IPC IPC(8): B01J20/30B01J20/26
Inventor 张旭王彦宁郭宏飞刘宾元
Owner HEBEI UNIV OF TECH
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