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Tannin-polyethyleneimine composite material and application thereof

A polyethyleneimine and composite material technology, applied in the field of polymer chemistry, can solve the problems of easy loss, difficult separation and recovery of adsorbents, restricting the application of PEI, etc., and achieves the effect of broad application prospects and excellent adsorption performance.

Active Publication Date: 2020-06-05
GUANGXI ZHUANG AUTONOMOUS REGION ACAD OF AGRI SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

PEI exists in the form of free molecules in aqueous solution, and it is difficult to separate and recover directly as an adsorbent, and it is easy to lose, which restricts the practical application of PEI as an adsorbent

Method used

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  • Tannin-polyethyleneimine composite material and application thereof
  • Tannin-polyethyleneimine composite material and application thereof
  • Tannin-polyethyleneimine composite material and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Embodiment 1 prepares tannin-polyethyleneimine composite material

[0032] (1) Prepare raw materials: prepare a tannin solution with a mass fraction of 1% and a polyethyleneimine solution with a mass fraction of 25%;

[0033] (2) The polyethyleneimine solution is added dropwise in the tannin solution, the volume ratio of the polyethyleneimine solution and the tannin solution is 1:100, that is, the polyethyleneimine participating in the reaction and the tannin mass ratio are 0.25, Stirring reaction at room temperature for 12 hours;

[0034] (3) The precipitate was collected by centrifugation, washed three times with distilled water, and dried at 50° C. for 12 hours to obtain the tannin-polyethyleneimine composite material.

Embodiment 2

[0035] Embodiment 2 prepares tannin-polyethyleneimine composite material

[0036] (1) Prepare raw materials: prepare a tannin solution with a mass fraction of 1% and a polyethyleneimine solution with a mass fraction of 25%;

[0037] (2) The polyethyleneimine solution is added dropwise in the tannin solution, the volume ratio of the polyethyleneimine solution and the tannin solution is 2:100, that is, the polyethyleneimine and tannin mass ratio participating in the reaction is 0.5, Stirring reaction at room temperature for 24 hours;

[0038] (3) The precipitate was collected by centrifugation, washed with distilled water for 4 times, and dried at 50° C. for 12 hours to obtain the tannin-polyethyleneimine composite material.

Embodiment 3

[0039] Embodiment 3 prepares tannin-polyethyleneimine composite material

[0040] (1) Prepare raw materials: prepare a tannin solution with a mass fraction of 1% and a polyethyleneimine solution with a mass fraction of 25%;

[0041] (2) The polyethyleneimine solution is added dropwise in the tannin solution, the volume ratio of the polyethyleneimine solution and the tannin solution is 3:100, that is, the polyethyleneimine and tannin mass ratio participating in the reaction is 0.75, Stirring reaction at room temperature for 24 hours;

[0042] (3) The precipitate was collected by centrifugation, washed five times with distilled water, and dried at 50° C. for 12 hours to obtain the tannin-polyethyleneimine composite material.

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PUM

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Abstract

The invention discloses a tannin-polyethyleneimine composite material synthesized by the action of tannin and polyethyleneimine. The invention also discloses a preparation method of the tannin-polyethyleneimine composite material. The tannin-polyethyleneimine composite material is obtained by compounding tannin and polyethyleneimine, has excellent adsorption performance on heavy metal ions, and has a wide application prospect in the field of heavy metal sewage treatment. Tannin has a large amount of phenolic hydroxyl groups, polyethyleneimine contains a large amount of primary amine, secondaryamine and tertiary amine, the two functional substances are synthesized into the composite material through hydrogen bond interaction, other toxic and harmful substances are not introduced, and the method is a green and feasible synthesis method.

Description

technical field [0001] The invention belongs to the technical field of polymer chemistry, and in particular relates to a tannin-polyethyleneimine composite material and its application. Background technique [0002] The harm of heavy metal pollutants to the ecological environment is well known, and the heavy metal pollution of the water environment caused by the discharge of industrial waste has become a serious environmental problem. Heavy metals cannot be biodegraded in environmental media. They are enriched in organisms through the food chain and may be transformed into more toxic chemical forms. Some organisms in the biological chain reach toxic levels and eventually accumulate in the human body and endanger human health. . At present, the methods for removing heavy metal ions in wastewater mainly include chemical precipitation, membrane separation, ion exchange, electrolysis and adsorption, etc. Among them, biosorption has attracted great attention from the industry du...

Claims

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Application Information

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IPC IPC(8): B01J20/26B01J20/30C02F1/28C02F101/20
CPCB01J20/261B01J20/22C02F1/285C02F1/286B01J2220/4812C02F2101/20
Inventor 蒋文艳邢钇浩莫磊兴王天顺廖洁陈伟
Owner GUANGXI ZHUANG AUTONOMOUS REGION ACAD OF AGRI SCI
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