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Microfluidic one-step synthesis method of chitosan microspheres for heavy metal wastewater treatment

A technology of chitosan microspheres and wastewater treatment, which is applied in water/sewage treatment, adsorption water/sewage treatment, water/sludge/sewage treatment, etc. It can solve the problems of time-consuming, high cost, and slow granulation

Inactive Publication Date: 2016-06-29
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the preparation of chitosan microspheres by traditional microfluidic control is cumbersome, time-consuming, slow granulation, high cost, and easy to cause waste of reagents

Method used

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  • Microfluidic one-step synthesis method of chitosan microspheres for heavy metal wastewater treatment
  • Microfluidic one-step synthesis method of chitosan microspheres for heavy metal wastewater treatment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] Preparation of chitosan microspheres:

[0060] Prepare chitosan microspheres according to the method of the present invention, step is as follows:

[0061] a. prepare aqueous solution of chitosan as dispersed phase, wherein, by weight of said aqueous solution of chitosan, the proportion of chitosan (purchased from Shanghai Shifeng Technology Co., Ltd.) is 2%, and the proportion of acetic acid is 2%. %;

[0062] b. prepare n-octane, Span and glutaraldehyde mixed solution as the continuous phase, wherein, by weight of the oil phase, the proportion of Span (purchased from Sinopharm Chemical Reagent Co., Ltd.) is 2%. The proportion of dialdehyde is 0.5%;

[0063] c. Pass the obtained continuous phase and dispersed phase into the microfluidic chip for shearing to form chitosan droplets, and cross-link and solidify, wherein the material of the microfluidic chip is polymethyl methacrylate, and the dispersed phase and the continuous phase The flow rate ratio is 1:5, and the ...

Embodiment 2

[0070] Preparation of chitosan microspheres:

[0071] Prepare chitosan microspheres according to the method of the present invention, step is as follows:

[0072] a. prepare aqueous solution of chitosan as dispersed phase, wherein, by weight of said aqueous solution of chitosan, the proportion of chitosan (purchased from Shanghai Shifeng Technology Co., Ltd.) is 4%, and the proportion of acetic acid is 2% %;

[0073] b. prepare n-octane, Span and glutaraldehyde mixed solution as the continuous phase, wherein, by weight of the oil phase, the proportion of Span (purchased from Sinopharm Chemical Reagent Co., Ltd.) is 4%. The proportion of dialdehyde is 0.5%;

[0074] c. Pass the obtained continuous phase and dispersed phase into the microfluidic chip for shearing to form chitosan droplets, and cross-link and solidify, wherein the material of the microfluidic chip is polymethyl methacrylate, and the dispersed phase and the continuous phase The flow rate ratio is 1:5, and the w...

Embodiment 3

[0081] Preparation of chitosan microspheres:

[0082] Prepare chitosan microspheres according to the method of the present invention, step is as follows:

[0083] a. prepare aqueous solution of chitosan as dispersed phase, wherein, by weight of said aqueous solution of chitosan, the proportion of chitosan (purchased from Shanghai Shifeng Technology Co., Ltd.) is 4%, and the proportion of acetic acid is 2% %;

[0084]b. prepare n-octane, Span and glutaraldehyde mixed solution as the continuous phase, wherein, by weight of the oil phase, the proportion of Span (purchased from Sinopharm Chemical Reagent Co., Ltd.) is 4%. The proportion of dialdehyde is 1%;

[0085] c. Pass the obtained continuous phase and dispersed phase into the microfluidic chip for shearing to form chitosan droplets, and cross-link and solidify, wherein the material of the microfluidic chip is polymethyl methacrylate, and the dispersed phase and the continuous phase The flow rate ratio is 1:7, and the wate...

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Abstract

The invention provides a chitosan microsphere microfluidic one-step synthesis method for heavy metal wastewater treatment, the method comprising the following steps: a. preparing chitosan aqueous solution as the dispersed phase; b. preparing the oil added with cross-linking agent phase as the continuous phase; c. passing the obtained continuous phase and the dispersed phase into the microfluidic chip for shearing, forming chitosan droplets, and cross-linking and curing; and d. the obtained cross-linking and curing chitosan particles After washing, dry to obtain chitosan microspheres.

Description

technical field [0001] The invention belongs to the field of microfluidic control granulation, and relates to a microfluidic one-step synthesis method of chitosan microspheres used for heavy metal wastewater treatment. Background technique [0002] Microfluidic technology has been developed for nearly 20 years, from pure chemical analysis methods based on micro-electromechanical processing systems to PDMS (polydimethylsiloxane) software designed by Whitesides and Quake at the beginning of this century. Etching and large-scale integrated microfluidic chips characterized by microvalve and micropumps, microfluidic technology is gradually advancing, and has become an important technology in emulsion preparation. Microfluidic technology refers to the technology based on the fluid mechanics characteristics at the microscopic scale, using a microchannel device with a cross-sectional size of 10-100 μm to exert force on the micro fluid in it, so as to precisely control and operate it...

Claims

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Application Information

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IPC IPC(8): B01J20/24B01J20/30C02F1/28C02F1/62
CPCB01J20/24C02F1/286C02F2101/20
Inventor 白志山朱勇王炳捷翟琳琳
Owner EAST CHINA UNIV OF SCI & TECH
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