Preparation method for metal ion printing chitosan porous micro-spheres

A metal ion imprinting, porous microsphere technology, applied in chemical instruments and methods, other chemical processes, etc., can solve the problems of difficult to control morphology, complex preparation process, poor monodispersity, etc. The effect of complex process and easy operation

Active Publication Date: 2013-12-04
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to overcome the existing chitosan microsphere preparation process complex, difficult to control the shape, poor monodispersity, small adsorption capacity, long adsorption time and other problems, to provide a preparation of ion-imprinted chitosan porous microspheres method

Method used

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  • Preparation method for metal ion printing chitosan porous micro-spheres

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Embodiment 1

[0023] The present embodiment provides a kind of preparation method of lead ion imprinted chitosan porous microsphere, specifically as follows:

[0024] (1) Dissolve 1g chitosan and 1.0g lead chloride in 100mL 1wt% acetic acid solution as the dispersed phase; n-octanol solution containing 1wt% glutaraldehyde and 1wt% Span80 as the continuous phase ; Wherein, glutaraldehyde is a crosslinking agent, and Span80 is a surfactant.

[0025] (2) Use two advection pumps to inject the dispersed phase and continuous phase prepared in the above (1) into the micro-sieve device, wherein the flow rate of the dispersed phase is 0.5mL / min, the flow rate of the continuous phase is 15mL / min, and the flow rate is 1m / s, the micro mesh diameter is 200μm.

[0026] (3) Collect the droplets obtained in the above (2) into the curing bath, and further cross-link and solidify the droplets to form chitosan microspheres; wherein, the temperature of the curing bath is 25 o C, curing time is 30min;

[00...

Embodiment 2

[0030] The present embodiment provides a kind of preparation method of copper ion imprinted chitosan porous microsphere, specifically as follows:

[0031] (1) Dissolve 2g chitosan and 0.2g copper sulfate in 100ml of 2wt% acetic acid solution as the dispersed phase; n-octanol solution containing 10wt% epichlorohydrin and 1wt% Span80 as the continuous phase ; Wherein, epichlorohydrin is a crosslinking agent, and Span80 is a surfactant.

[0032] (2) Use two advection pumps to inject the dispersed phase and continuous phase prepared in the above (1) into the micro-sieve equipment to prepare dispersed phase droplets; wherein, the flow rate of the dispersed phase is 1mL / min, and the flow rate of the continuous phase is 100mL / min, the shear speed is 0.1m / s, and the diameter of the micro-sieve is 400μm.

[0033] (3) Collect the droplets obtained in the above (2) into a curing bath, further cross-link and solidify the droplets to form chitosan microspheres; wherein, the temperature o...

Embodiment 3

[0037] The present embodiment provides a kind of preparation method of nickel ion imprinted chitosan porous microsphere, specifically as follows:

[0038] (1) Dissolve 3g chitosan and 0.6g nickel chloride in 100ml of 3wt% acetic acid solution as the dispersed phase; phase; wherein, epichlorohydrin is a crosslinking agent, and Span80 is a surfactant.

[0039] (2) Use two advection pumps to inject the dispersed phase and continuous phase prepared in the above (1) into the micro-sieve equipment to prepare dispersed phase droplets; wherein, the flow rate of the dispersed phase is 1mL / min, and the flow rate of the continuous phase is 30mL / min, flow rate 0.5m / s, micro mesh diameter 200μm.

[0040] (3) Collect the droplets obtained in the above (2) into a curing bath, further cross-link and solidify the droplets to form chitosan microspheres; wherein, the temperature of the curing bath is 30 o C, curing time is 20min;

[0041] (4) Use acetone, 0.01M EDTA solution and deionized water...

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Abstract

The invention discloses a preparation method for metal ion printing chitosan porous micro-spheres and belongs to the technical field of parting material preparation. The preparation method comprises the following steps of: using an acetic acid aqueous solution to dissolve chitosan and metal salt to serve as a dispersion phase, using an organic solvent immiscible to water to dissolve a surface active agent and a cross-linking agent to serve as a continuous phase, using a shear action of the continuous phase to disperse the dispersion phase to form micron order liquid drops in microstructural equipment, enabling the liquid drops to complete crosslinking and solidification to form micro-spheres after certain retention time, finally eluting the organic solvent, the surface active agent, uncreated cross-linking agent, the metal ion and the like in the micro-spheres, and drying to obtaining the metal ion printing chitosan porous micro-spheres. The method is simple, convenient and rapid, and prepared metal ion printing chitosan porous micro-spheres are even in size, keep good network structures and effective adsorption position points and have the characteristics of big adsorption capacity, high speed and the like. The preparation method provides an effective means for mass preparation of high-performance metal ion adsorbing materials.

Description

technical field [0001] The invention belongs to the technical field of preparation of separation materials, and in particular relates to a preparation method of metal ion imprinted chitosan porous microspheres. Background technique [0002] With the development of human society, water pollution has attracted more and more attention, and heavy metal pollution is one of the most harmful pollutions. Heavy metal pollution mainly comes from wastewater discharge from chemical industry, electroplating, non-ferrous metal smelting, electronics industry, nuclear industry, etc. Heavy metal ions are non-degradable, accumulative, and transferable in water. Ingestion of food and drinking water contaminated by heavy metals can cause abdominal cramps, hepatitis, high blood pressure, peripheral neuritis, toxic encephalitis, and anemia. Therefore, it is urgent to research and develop efficient and economical wastewater treatment technologies containing heavy metal ions. [0003] Adsorption ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J3/24C08J9/28C08J9/26C08L5/08C08K5/07C08K5/1515B01J20/24B01J20/30
Inventor 吕阳成何静骆广生
Owner TSINGHUA UNIV
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