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Preparation method of shape memory imprinting gel

A memory imprinting and gel technology, applied in chemical instruments and methods, alkali metal oxides/hydroxides, inorganic chemistry, etc., can solve problems such as difficult collection and recycling, achieve good gel structure, solve channel collapse, and facilitate Effects of reuse and recycling

Active Publication Date: 2020-01-24
CHANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to solve the above problems, the present invention uses nano-silica as stable particles, utilizes the Pickering high internal emulsion template method and boron affinity, and adopts self-assembled surface molecular imprinting technology to prepare high selectivity, high adsorption capacity, good Imprinted gel polymer with kinetic properties and shape memory function, and used for selective recognition and separation of tetrodotoxin in solution. The imprinted gel polymer has high selective adsorption and can overcome nano-silica particles Not easy to collect and recycle

Method used

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  • Preparation method of shape memory imprinting gel
  • Preparation method of shape memory imprinting gel
  • Preparation method of shape memory imprinting gel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] 1. A method for preparing an imprinted gel adsorbent for adsorbing tetrodotoxin, carried out according to the following steps:

[0033] (1) Preparation of water-soluble phenylboronic acid monomer

[0034] Take 2.7g of 3-aminophenylboronic acid and add it to 40mL 2M NaOH aqueous solution, and keep stirring until there are no solid particles. Under the condition of ice-water bath, slowly add 3.2mL of acryloyl chloride dropwise. After the dropwise addition, use mechanical stirring for 15min; then add to the reaction Slowly add concentrated HCL to the system to adjust the pH value of the system to 1.3. At this time, a large amount of white precipitates are formed. The precipitates are filtered with a Buchner funnel and washed with cold deionized water; the crude product is dissolved in 70 mL of deionized water and added to 4 mL Ethanol, heated to 60°C to dissolve the soluble substances; filter out the remaining insoluble impurities, and crystallize the filtrate in the refrige...

Embodiment 2

[0048] 1. A method for preparing an imprinted gel adsorbent for adsorbing tetrodotoxin, carried out according to the following steps:

[0049] (1) Preparation of water-soluble phenylboronic acid monomer

[0050] Take 3.0g of 3-aminophenylboronic acid and add it to 40mL of 2M NaOH aqueous solution, and keep stirring until there are no solid particles. Under the condition of ice-water bath, slowly add 3.6mL of acryloyl chloride dropwise. After the dropwise addition, use mechanical stirring for 15min; Slowly add concentrated HCL to the reaction system to adjust the pH value of the system to about 2.0. At this time, a large amount of white precipitates are formed. The precipitates are filtered with a Buchner funnel and washed with cold deionized water; the crude product is dissolved in 90 mL of deionized water. And add 8mL of ethanol, heat to 65°C to dissolve the soluble matter; filter out the residual insoluble impurities, and crystallize the filtrate in the refrigerator for 16 h...

Embodiment 3

[0063] 1. A method for preparing an imprinted gel adsorbent for adsorbing tetrodotoxin, carried out according to the following steps:

[0064] (1) Preparation of phenylboronic acid functional monomer:

[0065] Take 2.59g of 3-aminophenylboronic acid and add it to 40mL 2M NaOH aqueous solution, and keep stirring until there are no solid particles. Under the condition of ice-water bath, slowly add 3.0mL acryloyl chloride dropwise. After the dropwise addition, use mechanical stirring for 15min; Slowly add concentrated HCL to the reaction system to adjust the pH value of the system to about 0.6. At this time, a large amount of white precipitates are formed. The precipitates are filtered with a Buchner funnel and washed with cold deionized water; the crude product is dissolved in 60 mL of deionized water. And add 3mL of ethanol, and heat to 55°C to dissolve the soluble matter; filter off the remaining insoluble impurities, and crystallize the filtrate in the refrigerator for 12 hou...

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Abstract

The invention discloses a preparation method of a shape memory imprinting gel, and belongs to the technical field of adsorption material preparation. A prepared water-soluble phenylboronic acid, usedas a functional monomer, and tetrodotoxin are polymerized through a Pickering emulsion technology by utilizing the affinity effect of boron with nano-silica as a stable particle, a dispersion as a water phase and octadecyl methacrylate as an oil phase, an emulsion is introduced, polymerization is initiated by utilizing ultraviolet light to obtain a gel, and template molecules are eluted to obtainthe shape memory imprinting gel. The shape memory imprinted gel has a good adsorption separation performance and a remarkable adsorption separation effect on tetrodotoxin when applied to adsorption separation of tetrodotoxin in an aqueous solution. The prepared imprinted gel can be swelled and fully contacted with water after entering the water, the formed gel has a good structure, is not prone tobeing dispersed, can be restored to the original shape through drying after adsorption, has a certain shape memory function, is convenient for TTX enrichment, and can be repeatedly used and recycled.

Description

technical field [0001] The invention belongs to the technical field of preparation of adsorption materials, and in particular relates to a method for preparing gel with shape memory imprint by using Pickering emulsion method. Background technique [0002] Shape memory materials refer to materials that are deformed and restored to their original shape by physical or chemical stimulation such as heat, light, and electricity. Common shape memory materials include polyurethane foam and epoxy resin, which are usually used in the field of adsorption and separation. They have the advantages of simple separation and adsorption operation, easy recovery, large pore size, and good kinetic performance. Flexible material (Flexible material, FM) refers to a material whose skeleton structure can stretch, bend, twist and remain intact under external stimuli (such as pressure, temperature, guest molecules, etc.). Common flexible materials include polyurethane foam, polypropylene fiber, and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/18C08F230/06C08F220/54C08F220/20C08F2/48C08J9/26B01J20/26B01J20/28B01D15/08B01J20/30
CPCB01D15/08B01J20/268B01J20/28047C08F2/48C08F220/18C08J9/26C08J2201/0424C08J2333/10
Inventor 欧红香李桥贡晨霞卫宁郑旭东黄如君
Owner CHANGZHOU UNIV
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