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Method for preparing chitosan/rectorite magnetic nanocomposite

A composite material and magnetic nanotechnology, applied in chemical instruments and methods, other chemical processes, etc., can solve the problems of adsorption limitations, restrictions on the application of rectorite, poor separation of adsorbed substances, etc., and achieve good mechanical strength and preparation The effect of easy process control and strong chemical resistance

Pending Publication Date: 2016-11-02
西安以锵电子科技有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the hydrolysis of cations between rectorite layers, its adsorption is limited, and the separation effect of adsorbed substances is not good, which limits the application of rectorite in water treatment.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] (1) Add the chitosan powder into a sulfuric acid solution with a pH of 2 and submerge it, soak it under magnetic stirring for 5 hours, stop stirring until the chitosan powder is precipitated, and then conduct solid-liquid separation, and wash the chitosan powder with deionized water 2 times; put the washed chitosan powder into an oven, dry it into a cake shape at a temperature of 60 ° C, and smash it into a powder shape to obtain the modified chitosan;

[0019] (2) Fe 3 O 4 Dissolve with 50 mL of concentrated hydrochloric acid under nitrogen protection to form a yellow-brown transparent solution, add 1 mL of surfactant Tween-80, add ammonia water dropwise with stirring, when the pH value is 8, continue stirring for 13 min, and then the water bath The temperature was raised to 79°C, and aged at this temperature for 2 hours; after the reaction was completed, the precipitate was allowed to stand at room temperature for 20 hours, the beaker containing the precipitate was p...

Embodiment 2

[0022] (1) Add the chitosan powder to the sulfuric acid solution with pH 2 and submerge it, soak it under magnetic stirring for 8 hours, stop stirring until the chitosan powder is precipitated, and then conduct solid-liquid separation, and wash the chitosan powder with deionized water 2 to 3 times; put the washed chitosan powder into an oven, dry it into a cake shape at a temperature of 60 ° C, and smash it into a powder shape to obtain the modified chitosan;

[0023] (2) Fe 3 O 4 Dissolve with 80 mL of concentrated hydrochloric acid under nitrogen protection to form a yellow-brown transparent solution, add 3 mL of surfactant Tween-80, add ammonia water dropwise under stirring, when the pH value is 10, continue stirring for 16 min, and then the water bath The temperature was raised to 81 °C, and aged for 6 h at this temperature; after the reaction was completed, the precipitate was allowed to stand at room temperature for 25 h, the beaker containing the precipitate was placed...

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Abstract

The invention relates to a method for preparing chitosan / rectorite magnetic nanocomposite material: the first step is to modify chitosan; the second step is to prepare powdery Fe3O4 nanoparticles; the third step is to prepare chitosan / rectorite magnetic nanocomposites. Compared with the prior art, the chitosan / rectorite magnetic nanocomposite material prepared by the preparation method provided by the invention has the advantages of strong chemical resistance, good mechanical strength and good thermal stability; simultaneously, the process is simple, The preparation process is easy to control and the price is low.

Description

technical field [0001] The invention belongs to the technical field of environmental nanometer new functional materials, in particular to a method for preparing a chitosan / rectorite magnetic nanocomposite material. Background technique [0002] Chitosan is a natural polymer with abundant sources and various biological activities. It is widely used in many fields such as drug loading and controlled release, antibacterial biological materials, daily chemical products, wastewater treatment, etc. However, similar to most biological macromolecules, it is difficult to industrialize due to the limitation of poor heat resistance. [0003] Rectorite is a regular interlayer mineral from mica to montorite. It has the advantages of large specific surface area, strong surface activity and adsorption performance, high cation exchange performance, and low cost and easy availability. As a new type of mineral adsorption Materials are widely used. However, due to the hydrolysis of cations i...

Claims

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Application Information

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IPC IPC(8): B01J20/24B01J20/30
Inventor 苗兴
Owner 西安以锵电子科技有限责任公司
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