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a use of co 2 Method for preparing amidoxime-functionalized hollow porous polymer microspheres as emulsion templates

A porous polymer, emulsion template technology, applied in the direction of alkali metal compounds, chemical instruments and methods, alkali metal oxides/hydroxides, etc. Capacity, high adsorption capacity, the effect of simplifying the preparation process

Active Publication Date: 2021-05-25
HANGZHOU ENJOY ENVIRONMENTAL PROTECTION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Aiming at the deficiencies of the prior art, the purpose of the present invention is to overcome the problems that the internal phase is difficult to elute and the structure is not easy to control during the preparation of the existing Pickering emulsion template method, and to provide an amidoxime functionalized air-in-water emulsion template method for preparing hollow A porous adsorbent method, using amidoxime groups as selective ligands and using melamine resin as a substrate, prepared a hollow porous adsorbent (MF-AO-HPS) grafted with amidoxime functional groups on the surface

Method used

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  • a use of co <sub>2</sub> Method for preparing amidoxime-functionalized hollow porous polymer microspheres as emulsion templates
  • a use of co <sub>2</sub> Method for preparing amidoxime-functionalized hollow porous polymer microspheres as emulsion templates
  • a use of co <sub>2</sub> Method for preparing amidoxime-functionalized hollow porous polymer microspheres as emulsion templates

Examples

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Embodiment 1

[0049] (1) Preparation of silica nanoparticles;

[0050] use Method to manufacture silica nanoparticles: In a flask, add 8.735g TEOS to 180mL of ethanol, after heating in a water bath to 35°C, add 10mL of NH 3 ·H 2 A mixed solution of O and 9.48g water; then the formed mixed solution was reacted for 3.0h under magnetic stirring; after the reaction was completed, the product was collected by centrifugation and washed three times with deionized water and ethanol respectively; 200 nm silica nanoparticles;

[0051] (2) preparation of hollow porous melamine resin;

[0052] At 85°C, 1.26g of melamine was added to 3.0mL of a mixed solution of 37% formaldehyde and 25% glutaraldehyde (v / v, 2:1), and then 2.0M Na 2 CO 3 Adjust the pH of the solution to 9.5, stir at 1500rpm, and continue to react for 3.0min after the solution turns from milky white to clear; then, add 10mL of 10wt% silica water dispersion under stirring, and continue to react for 20min; then, cool the solution To ...

Embodiment 2

[0064] (1) Preparation of silica nanoparticles;

[0065] use Method to manufacture silica nanoparticles: In a flask, add 8.0g TEOS to 170mL ethanol, heat in a water bath to 30°C, then add 9.0mL NH 3 ··H 2 O and 9.0 g H 2 O mixed solution; then the formed mixed solution was reacted under magnetic stirring for 2.0h; after the reaction was completed, the product was collected by centrifugation and washed three times with deionized water and ethanol respectively; after drying, a silica with a diameter of about 200nm could be obtained Nanoparticles.

[0066] (2) preparation of hollow porous melamine resin;

[0067] Add 1.0 g of melamine to 2.0 mL of a mixed solution of 37% formaldehyde and 25% glutaraldehyde (v / v, 2:1) at 80°C, and then use 2.0M Na 2 CO 3 The pH of the solution was adjusted to 9.0, stirred at 1200rpm, and the reaction was continued for 4.0min after the solution changed from milky white to clear; then, 5.0 mL of 10wt% silica aqueous dispersion was added under ...

Embodiment 3

[0072] (1) Preparation of silica nanoparticles;

[0073] use Method to manufacture silica nanoparticles: In a flask, add 10g TEOS to 190mL ethanol, heat in a water bath to 40°C, then add 11mL NH 3 ·H 2 O and 10g H 2 A mixed solution of O. Then the resulting mixed solution was reacted for 4.0 h under magnetic stirring. After the reaction was completed, the product was collected by centrifugation and washed three times with deionized water and ethanol respectively. After drying, silica nanoparticles with a diameter of about 200 nm can be obtained.

[0074] (2) preparation of hollow porous melamine resin;

[0075] At 90°C, 2.0 g of melamine was added to 4.0 mL of a mixed solution of 37% formaldehyde and 25% glutaraldehyde (v / v, 2:1), and then 2.0 M Na 2 CO 3 The pH of the solution was adjusted to 10.0, stirred at 1600 rpm, and the reaction was continued for 5.0 min after the solution changed from milky white to clear; then, 15 mL of 10 wt % silica aqueous dispersion was ...

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Abstract

A use of CO 2 A method for the preparation of amidoxime-functionalized hollow porous polymer microspheres for emulsion templates. The invention belongs to the technical field of adsorption and separation functional materials, and relates to a CO 2 The method for preparing the amidoxime functionalized hollow porous adsorbent as an emulsion template; the steps are: first prepare silicon dioxide nanoparticles and MF-HP; add MF-HP and PEA to ethanol, react through ultrasound, water bath, wash with water, Washed with ethanol and dried to obtain MF‑NH 2 ‑HP, added to glutaraldehyde aqueous solution, after water bath, water washing, alcohol washing, and drying to obtain MF‑CHO‑HP, then add DAMN to ethanol solution, after water bath, water washing, alcohol washing, and drying to obtain MF‑CN‑HP , add hydroxylamine hydrochloride to a mixed solution of water and ethanol, after the reaction, wash with water, wash with alcohol, and dry to obtain MF-AO-HPS; the present invention provides the possibility for subsequent modification of a large number of action sites by grafting PEA, and hollow porous The combination of the structure not only improves the adsorption capacity of adsorbed U(VI), but also accelerates the mass transfer kinetics.

Description

technical field [0001] The invention belongs to the technical field of preparation of adsorption and separation functional materials, in particular to a CO 2 A method for preparing an amidoxime functionalized hollow porous adsorbent as an emulsion template. Background technique [0002] Due to its special use in the nuclear industry, naturally occurring uranium resources have become strategic resources for the nuclear industry. The proven uranium resources mainly exist in seawater in the form of hexavalent uranium (U(VI)), which is about 4.5 billion tons, which means that seawater is a potential source of uranium resources. Due to the relative difficulty of extracting a large amount of uranium from seawater, its wide application is seriously limited. Furthermore, the presence of uranium in seawater is not only harmful to humans and the environment, but also dangerous due to its radioactive and chemical toxicity. Therefore, extracting uranium from seawater not only has eco...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/26B01J20/28B01J20/30C02F1/28C02F103/08
CPCB01J20/265B01J20/28021B01J20/30C02F1/285C02F2101/006C02F2103/08B01J20/262Y02P10/20B01J20/26
Inventor 白雪潘建明刘金鑫
Owner HANGZHOU ENJOY ENVIRONMENTAL PROTECTION TECH
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