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A kind of preparation method and application of chitosan composite material

A composite material and chitosan technology, applied in the direction of material excitation analysis, chemical instruments and methods, alkali metal compounds, etc., can solve the problems of low sensitivity, single gold ion detection or adsorption, and low practicability

Inactive Publication Date: 2017-04-19
ANHUI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Some of the current technologies only realize the detection or adsorption of gold ions, and because most of the gold content in the gold-containing waste liquid is low, most of these synthesized materials have low sensitivity and little practicability

Method used

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  • A kind of preparation method and application of chitosan composite material
  • A kind of preparation method and application of chitosan composite material
  • A kind of preparation method and application of chitosan composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] A preparation method of chitosan composite material includes the following steps:

[0036] (1) Preparation of chitosan nanospheres

[0037] Measure 3.75ml of glutaraldehyde in a 50ml volumetric flask, use 1,4-dioxane to make the volume up to the mark, and prepare a glutaraldehyde-1,4-dioxane solution for later use; weigh 0.1g Chitosan is dissolved in 12ml of 3% acetic acid solution to obtain chitosan acetic acid solution. Dissolve and mix thoroughly; mix 80ml of liquid paraffin, 4ml of surfactant span-80, and 1.0g of co-surfactant magnesium stearate at room temperature. After 1 hour, add the above-mentioned chitosan acetic acid solution dropwise. After stirring the mixed solution for 1 hour, add dropwise 2ml of the prepared glutaraldehyde solution in an oil bath at 40°C for 6 hours, and set the obtained product at a low speed of 4000rpm. The chitosan microspheres with larger particle size were removed by centrifugation, and then the clear liquid was centrifuged again at 800...

Embodiment 2

[0055] A preparation method of chitosan composite material includes the following steps:

[0056] (1) Preparation of chitosan nanospheres

[0057] Measure 3.75ml of glutaraldehyde in a 50ml volumetric flask, use 0.08g / ml of 1,4-dioxane to make the volume up to the mark, and prepare a glutaraldehyde-1,4-dioxane solution for later use ; Weigh 0.1g of chitosan, dissolve it in 12ml of 3% acetic acid solution to obtain chitosan acetic acid solution, dissolve and mix thoroughly; mix 80ml of liquid paraffin, 4ml of surfactant span-80, 1.0g of cosurfactant hard After stirring the magnesium fatty acid for 1 hour at room temperature, add the above chitosan acetic acid solution dropwise. After the mixed solution continues to stir for 1 hour, add dropwise 2.06g of the prepared glutaraldehyde solution in an oil bath at 40°C for 6 hours. The obtained product was centrifuged at 4000 rpm at a low speed to remove the larger chitosan microspheres, and then the clear liquid was centrifuged again at ...

Embodiment 3

[0061] A preparation method of chitosan composite material includes the following steps:

[0062] (1) Preparation of chitosan nanospheres

[0063] Measure 3.75ml of glutaraldehyde in a 50ml volumetric flask, use 1,4-dioxane to make the volume up to the mark, and prepare a glutaraldehyde-1,4-dioxane solution for later use; weigh 0.1g Chitosan is dissolved in 12ml of 3% acetic acid solution to obtain chitosan acetic acid solution. Dissolve and mix thoroughly; mix 80ml of liquid paraffin, 4ml of surfactant span-80, and 1.0g of co-surfactant magnesium stearate at room temperature. After 1 hour, add the above-mentioned chitosan acetic acid solution dropwise. After the mixed solution continues to stir for 1 hour, add dropwise 2.06g of the prepared glutaraldehyde solution in an oil bath at 40°C for 6 hours, and the obtained product is first 4000rpm Centrifuge at low speed to remove the larger chitosan microspheres, and then centrifuge the clear solution again at 8000 rpm to obtain smalle...

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PUM

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Abstract

The invention provides a preparation method and application of a chitosan composite material. According to the preparation method and application, chitosan is utilized as a carrier, and surface modification is conducted on Rhodamine B fluorescent groups, so that the chitosan composite material, namely a multifunctional nano material capable of integrating adsorption and detection on AuCl4, is prepared. Compared with the prior art, the preparation method and application fully utilize the characteristics of a fluorescent substance, the chitosan and a nano material, so that functional groups are relatively concentrated on the molecular surface of the chitosan, and the purposes of simultaneous adsorption and detection on the AuCl4 can be realized. The Rhodamine B fluorescent groups as well as amino groups are contained in the chitosan composite material prepared by the preparation method, and the adsorption and the fluorescence detection on the AuCl4 can be performed. Therefore, the prepared chitosan composite material can be utilized for adsorption and detection simultaneously, and has the multifunctional property.

Description

Technical field [0001] The invention relates to the field of composite material preparation, in particular to a preparation method and application of a chitosan composite material. Background technique [0002] With the rapid economic development, pollution caused by heavy metal ions is increasing day by day, especially water, soil and food pollution caused by heavy metal ions have damaged our living environment time and time again. Heavy metal pollution has become an impact on the health of our people and the social economy. An important factor in development. Therefore, how to accurately determine trace elements in geological, biological and environmental samples has become a major challenge for chemists. [0003] Among the heavy metal pollutants, the pollution of the precious metal gold cannot be underestimated. In the gold-containing waste liquid produced in industrial production, the content of gold is mostly low, even trace or trace amount, so the sensitivity of detection i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07D491/107G01N21/64B01J20/26B01J20/28B01J20/30
Inventor 刘金水刘文秀王佩佩
Owner ANHUI NORMAL UNIV