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Silicon dioxide chitosan composite material, and preparation method and application thereof

A technology of silica and composite materials, applied in chemical instruments and methods, material excitation analysis, other chemical processes, etc., can solve problems such as single function

Active Publication Date: 2014-09-17
ANHUI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the materials reported in the literature can only be used for the adsorption or detection of mercury (II) ions, and have a single function

Method used

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  • Silicon dioxide chitosan composite material, and preparation method and application thereof
  • Silicon dioxide chitosan composite material, and preparation method and application thereof
  • Silicon dioxide chitosan composite material, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] A. Pyrene butyric acid modified chitosan:

[0044] 1g of chitosan was dissolved in 100ml of 1% acetic acid to obtain a chitosan solution. 0.27g of pyrenebutyric acid, 0.38g of 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide and 0.3g of NN -Hydroxysuccinimide was dissolved in 2ml methanol, mixed evenly and added to the chitosan solution, then methanol solution was added, after stirring for 24h, 2ml methanol / ammonia mixture was added, the product was precipitated and washed to obtain the product;

[0045] B. Preparation of quaternized pyrene butyrate chitosan composite material:

[0046] Dissolve 0.6g of product from step A in 40ml of isopropanol. After mixing, add 10ml of hydroxypropyltrimethylammonium chloride aqueous solution with a concentration of 0.3g / ml. Heat to 80℃, stir and react for 8h, cool, The dark yellow quaternized pyrene butyrate chitosan composite material obtained by suction filtration and washing;

[0047] C. Epoxy modified silica nano material:

[0048] Add 0.5g...

Embodiment 2

[0067] A. Pyrene butyric acid modified chitosan:

[0068] Dissolve chitosan in 1% acetic acid to obtain a chitosan solution with a concentration of 0.015g / ml. Combine pyrene butyric acid, 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide and The quality of NN-hydroxysuccinimide dissolved in methanol, pyrene butyric acid, 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide, NN-hydroxysuccinimide and chitosan The ratio is 0.16:0.35::0.35:1; the concentration of pyrenebutyric acid in methanol is 0.4mol / L. After mixing it evenly, add it to the obtained chitosan solution, then add methanol solution, the volume is the volume of chitosan solution After stirring for 20 hours, add methanol / ammonia mixture. The volume ratio of methanol and ammonia is 1:1, and the volume ratio of methanol / ammonia mixture to chitosan solution is 1:50; after the product is precipitated, wash, that is The resulting product

[0069] B. Preparation of quaternized pyrene butyrate chitosan composite material:

[0070] Dissol...

Embodiment 3

[0077] A. Pyrene butyric acid modified chitosan:

[0078] Dissolve chitosan in 1% acetic acid to obtain a chitosan solution with a concentration of 0.015g / ml. Combine pyrene butyric acid, 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide and The quality of NN-hydroxysuccinimide dissolved in methanol, pyrene butyric acid, 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide, NN-hydroxysuccinimide and chitosan The ratio is 0.2:0.4::0.4:1; the concentration of pyrenebutyric acid in methanol is 0.4mol / L. After mixing it evenly, add it to the obtained chitosan solution, then add the methanol solution, the volume is the chitosan solution volume After stirring for 20 hours, add methanol / ammonia mixture, where the volume ratio of methanol to ammonia is 1:1, and the volume ratio of methanol / ammonia mixture to chitosan solution is 1:55;

[0079] After the product precipitates, it is washed to obtain the product;

[0080] B. Preparation of quaternized pyrene butyrate chitosan composite material:

[0081]...

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Abstract

The invention provides a silicon dioxide chitosan composite material, and a preparation method and application thereof. The preparation method comprises the following steps: modifying chitosan with pyrenylbutyric acid, preparing a quaternized pyrenylbutyric acid chitosan composite material, modifying a silicon dioxide nano material with an epoxy group, and preparing the silicon dioxide chitosan composite material. By taking the chitosan as a carrier, performing surface modification with a pyrenylbutyric acid fluorophore, quaternizing and then reacting with the epoxy-modified silicon dioxide nano material, the multifunctional nano material having the functions of adsorbing and detecting mercury (II) ions is prepared.

Description

Technical field [0001] The invention belongs to the field of material preparation, and specifically relates to a silica chitosan composite material, a preparation method and an application thereof. Background technique [0002] With the development of modern science and technology and the improvement of people's living standards, environmental pollution is also increasing. Environmental pollution has increasingly become one of the common concerns of all countries in the world. Environmental pollution is the most direct and most easily felt by people. The consequence of environmental pollution is to destroy the living environment of mankind and affect the quality of life, health and production activities of mankind. Among them, heavy metal pollution has caused great harm to the environment and human health. The main harm of heavy metal pollution to the body is the "three causes": carcinogenic, disease-causing, and mutagenic. Among many heavy metal pollution, mercury (II) ion pol...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L5/08C08K9/06C08K3/36B01J20/24G01N21/64
Inventor 刘金水臧灵杰唐驰
Owner ANHUI NORMAL UNIV