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Magnetic porous cationic polymer adsorbent and preparation method thereof

A cationic and macromolecular technology, applied in the field of magnetic porous cationic macromolecular adhesive and its preparation, can solve the problems of poor adsorption effect, poor applicability, large dosage, etc., and achieve the effects of simple process, simplified time-consuming, and low-solvent preparation.

Active Publication Date: 2017-05-10
FUZHOU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It not only overcomes the disadvantages of poor pH applicability of polyethyleneimine, but also overcomes the disadvantages of poor adsorption effect, large dosage and high cost of chitosan under acidic and alkaline conditions.

Method used

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  • Magnetic porous cationic polymer adsorbent and preparation method thereof
  • Magnetic porous cationic polymer adsorbent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] (1) Disperse 0.2 g of ferrous chloride tetrahydrate and 0.8 g of ferric chloride hexahydrate in 30 mL of deionized water, and mix well by ultrasonic;

[0018] (2) Add the mixed solution obtained in step (1) dropwise into 50 mL of acetic acid solution in which 0.5 g of chitosan and 0.1 g of polyethyleneimine were dissolved, and emulsify with a homogenizer for 15 min;

[0019] (3) Transfer the mixture obtained in step (2) into a three-necked flask, heat it to 40°C after blowing in nitrogen, add 3 mL of ammonia water, react for 0.5 h, then add 0.1 g of polyethyleneimine, and emulsify with a homogenizer 10 minutes;

[0020] (4) Add 0.1 mL of epichlorohydrin to the mixture obtained in step (3), and cross-link for 0.5 hours; stop the reaction with cold water, and adjust the pH to neutral with 1mol / L hydrochloric acid solution, and then freeze the product after separation with an external magnetic field Dry to obtain the magnetic porous cationic polymer adsorbent;

[0021] (...

Embodiment 2

[0023] (1) Disperse 0.5 g of ferrous chloride tetrahydrate and 2.5 g of ferric chloride hexahydrate in 30 mL of deionized water, and mix well by ultrasonic;

[0024] (2) Add the mixed solution obtained in step (1) dropwise into 50 mL of acetic acid solution in which 1.0 g of chitosan and 0.3 g of polyethyleneimine were dissolved, and emulsify with a homogenizer for 15 min;

[0025] (3) Transfer the mixture obtained in step (2) into a three-necked flask, heat it to 80°C after blowing in nitrogen, add 5.0 mL of ammonia water, react for 1.5 h, then add 0.8 g of polyethyleneimine, and emulsify with a homogenizer 10 minutes;

[0026] (4) Add 0.4 mL of epichlorohydrin to the mixture obtained in step (3), and conduct a crosslinking reaction for 1.0 hour; stop the reaction with cold water, and adjust the pH to neutral with 1mol / L hydrochloric acid solution, and freeze the product after separation with an external magnetic field Dry to obtain the magnetic porous cationic polymer adsor...

Embodiment 3

[0029] (1) Disperse 1.0 g of ferrous chloride tetrahydrate and 2.5 g of ferric chloride hexahydrate in 30 mL of deionized water, and mix well by ultrasonic;

[0030] (2) Add the mixed solution obtained in step (1) dropwise to 50 mL of acetic acid solution in which 1.2 g of chitosan and 1.0 g of polyethyleneimine were dissolved, and emulsify with a homogenizer for 15 min.

[0031] (3) Transfer the mixture obtained in step (2) into a three-necked flask, heat it to 90°C after blowing in nitrogen, add 11.0 mL of ammonia water, react for 1.0 h, then add 2.0 g of polyethyleneimine, and emulsify with a homogenizer 10 minutes;

[0032] (4) Add 1.0 mL of epichlorohydrin to the mixture obtained in step (3), and cross-link for 2.0 hours; stop the reaction with cold water, and adjust the pH to neutral with 1mol / L hydrochloric acid solution, and freeze the product after separation with an external magnetic field Dry to obtain the magnetic porous cationic polymer adsorbent;

[0033] (5) 2...

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Abstract

The invention discloses magnetic porous cationic polymer adsorbent and a preparation method thereof. The preparation method comprises the following steps of ultrasonically and evenly emulsifying ferrous chloride tetrahydrate, ferric chloride hexahydrate, polyethyleneimine and chitosan; generating ferroferric oxide nanometer particles in an in-situ nucleation mode after heating reaction, wherein the magnetic nanometer particles are included by molecular chains of the chitosan and the polyethyleneimine to form a ternary network interpenetrating composite during nucleation growth; then performing cross-linking graft on the polyethyleneimine and the composite through cross-linking reaction, so as to obtain the polyethyleneimine-chitosan magnetic porous cationic polymer adsorbent. The adsorbent has a good adsorbing effect on congo red; when the batch charge of the adsorbent is increased to 25mg, the removal rate of 100mg / L (50ml) congo red can be 95% or more; the adsorbent has a simple and quick magnetic separation function, is beneficial to simplifying a general centrifugation and settlement process which consumes time and energy in a water treatment process, and has good application prospect in the field of sewage treatment.

Description

technical field [0001] The invention belongs to the technical field of composite materials, and in particular relates to a magnetic porous cationic polymer adhering agent and a preparation method thereof. Background technique [0002] With the rapid development of modern industry, the massive discharge of industrial waste water and domestic waste water, as well as the unreasonable use of pesticides and chemical fertilizers have caused serious pollution of water bodies and seriously affected people's healthy lives. Therefore, the study of economical and efficient wastewater treatment methods is the focus of current attention. At present, wastewater treatment technologies mainly include photocatalytic oxidation, chemical coagulation, biosorption and other technologies, among which biosorption is a simple, effective and economical method, so biosorption method has broad application prospects in water treatment. Adsorbent is the key core of biosorption. The current adsorbents m...

Claims

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Application Information

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IPC IPC(8): B01J20/26B01J20/28B01J20/30C02F1/28C02F101/22C02F101/30
CPCB01J20/267B01J20/28009B01J20/28054C02F1/288C02F2101/22C02F2101/308
Inventor 游力军黄慈王傲宋立岛张其清
Owner FUZHOU UNIVERSITY
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