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Application and preparation method of hexavalent chromium ion imprinted composite membrane with alpha-methacrylic acid serving as functional monomer

A technology of hexavalent chromium ion and methacrylic acid, which is applied in chemical instruments and methods, alkali metal compounds, alkali metal oxides/hydroxides, etc., can solve the problem of selective adsorption, separation and specific recognition of unfavorable hexavalent chromium ions Site damage and other problems, to achieve the effect of good imprinting effect, good stability, and simple preparation method

Inactive Publication Date: 2019-03-08
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The patent application is CN 107446086 A, which uses metal ion imprinting technology to use hexavalent chromium ions as a template to prepare an imprinted polymer, and achieves good results. However, the preparation process of imprinted polymers requires grinding, and the specific recognition site It is easy to cause damage, which is not conducive to the selective adsorption and separation of hexavalent chromium ions

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The preparation method of the hexavalent chromium ion imprinted composite membrane using α-methacrylic acid as the functional monomer comprises the following steps: using hexavalent chromium ion as the template ion, α-methacrylic acid as the functional monomer, and ethylene glycol di Methacrylate is used as a crosslinking agent, azobisisobutyronitrile is used as an initiator, and a mixed solution of organic solvent and water with a volume ratio of 1:1 is used as a porogenic solvent, and hexavalent chromium ions are prepared by surface grafting. Blot the composite membrane.

[0021] Specific steps are as follows:

[0022] Step 1, the 0.1mmolK 2 Cr 2 o 7 Dissolve in 10 mL of organic solvent (methanol) and water mixed solution pore-forming solvent with a volume ratio of 1:1, then add α-methacrylic acid functional monomer, react at constant temperature for 2 h at room temperature, add ethylene glycol di Methacrylate and azobisisobutyronitrile, dissolved and shaken to fo...

Embodiment 2

[0026] The preparation method of the hexavalent chromium ion imprinted composite membrane using α-methacrylic acid as the functional monomer comprises the following steps: using hexavalent chromium ion as the template ion, α-methacrylic acid as the functional monomer, and ethylene glycol di Methacrylate is used as a crosslinking agent, azobisisobutyronitrile is used as an initiator, and a mixed solution of organic solvent and water with a volume ratio of 1:1 is used as a porogenic solvent, and hexavalent chromium ions are prepared by surface grafting. Blot the composite membrane.

[0027] Specific steps are as follows:

[0028] Step 1, the 0.1mmolK 2 Cr 2 o 7 Dissolve in 10 mL of organic solvent (ethanol) and water mixed solution pore-forming solvent with a volume ratio of 1:1, then add α-methacrylic acid functional monomer, shake and react at room temperature for 3 hours, add ethylene glycol dimethyl Base acrylate and azobisisobutyronitrile, dissolve and shake well to for...

Embodiment 3

[0032] The preparation method of the hexavalent chromium ion imprinted composite film using α-methacrylic acid as the functional monomer comprises the following steps: using hexavalent chromium ion as the template ion, α-methacrylic acid as the functional monomer, and ethylene glycol di Methacrylate is used as a crosslinking agent, azobisisobutyronitrile is used as an initiator, and a mixed solution of organic solvent and water with a volume ratio of 1:1 is used as a porogenic solvent, and hexavalent chromium ions are prepared by surface grafting. Blot the composite membrane.

[0033] Specific steps are as follows:

[0034] Step 1, the 0.1mmolK 2 Cr 2 o 7 Dissolve in 10 mL of organic solvent (acetonitrile) and water mixed solution pore-forming solvent with a volume ratio of 1:1, then add α-methacrylic acid functional monomer, react at room temperature for 3 h with constant temperature shaking, add ethylene glycol di Methacrylate and azobisisobutyronitrile, dissolved and sh...

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Abstract

The invention belongs to the technical field of heavy metal ion adsorption separation and relates to an application and preparation method of a hexavalent chromium ion imprinted composite membrane with alpha-methacrylic acid serving as a functional monomer. The method includes that by adoption of hexavalent chromium ions as template ions, alpha-methacrylic acid as the functional monomer, glycol dimethyl acrylate as a cross-linking agent, azodiisobutyronitrile as an initiator and a pore forming solvent formed by mixed solution of an organic solvent and water in a volume ratio of 1:1, the hexavalent chromium ion imprinted composite membrane is prepared according to a surface grafting method. By combination of the ion imprinting technique and the membrane separation technique, complex operations such as grinding or screening are avoided, specific recognition sites can be protected, high stability, high environmental adaptability and availability for extreme solution environments are realized, and application to adsorption separation of hexavalent chromium ions in solution containing Cr (VI) is realized.

Description

technical field [0001] The invention relates to a preparation method and application of a hexavalent chromium ion imprinted composite membrane using α-methacrylic acid as a functional monomer, and belongs to the technical field of heavy metal ion adsorption and separation. Background technique [0002] Industrial wastewater contains toxic pollutants that are harmful to organisms and the environment. Among these pollutants, heavy metals are considered to be one of the most dangerous pollutants, and hexavalent chromium ions are one of the important heavy metal pollutants. Through electroplating, metal Extensive emissions into the environment from industries such as surface treatment, leather tanning, paints, pigments, textiles and steel manufacturing have posed a serious threat to humans and the environment. Currently, many methods have been used to treat hexavalent chromium ions, including reverse osmosis, reduction and precipitation, ultrafiltration, ion exchange, and membra...

Claims

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Application Information

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IPC IPC(8): C08F222/14C08F220/06C08J9/26B01J20/26B01J20/28C02F1/28B01J20/30C02F101/22
CPCC02F1/285C08F222/10C08J9/26B01J20/268B01J20/28033C02F2101/22C08J2201/0442C08J2335/02C08F222/102C08F220/06
Inventor 成会玲胡德琼刘迎梅陈树梁王朝武陈云龙何易字富庭胡显智
Owner KUNMING UNIV OF SCI & TECH
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