Novel surrounding purifying material as well as preparation and use thereof

A technology of environmental purification and compounds, applied in the direction of botany equipment and methods, applications, chemicals for biological control, etc., can solve the problems of toxic application range, high cost, poor persistence, etc., and achieve obvious antibacterial effect and low cost Inexpensive, easy-to-use effect

Inactive Publication Date: 2009-01-21
SHANGHAI NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] One of the technical problems to be solved by the present invention is to provide an environmental purification material to overcome the defects of high cost, easy hydrolysis, poor durability, certain toxicity and narrow application range in the above-mentioned prior art.

Method used

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  • Novel surrounding purifying material as well as preparation and use thereof
  • Novel surrounding purifying material as well as preparation and use thereof
  • Novel surrounding purifying material as well as preparation and use thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] a) first weigh 1.50mmol refined chitosan, dissolve it with 40mL of 1% acetic acid solution, then add water to dilute the solution until the pH of the solution is 4-5, and set aside;

[0036] b) Weigh the rare earth compound with the ratio of 10:1 to the amount of chitosan, and the transition metal compound with the ratio of 2:3 to the amount of rare earth compound, and prepare 1.50mol / L rare earth compound respectively Compound solution and 0.75mol / L transition metal compound solution;

[0037] c) Slowly add the rare earth compound solution and the transition metal compound solution prepared in step b) dropwise to the solution prepared in step a) at the same time, and the dropping rate is controlled at 60-80 drops / min;

[0038] d) Stirring and reacting at 15°C for 8 hours, the stirring speed was controlled at 400r / min;

[0039] e) After the reaction is completed, adjust the pH of the solution to 7-8, the complexed product is precipitated in the form of flocculent preci...

Embodiment 2

[0046] a) first weigh 2.00mmol food-grade chitosan, dissolve it with 80mL of 1% acetic acid solution, then add water to dilute until the pH of the solution is 3-4, and set aside;

[0047]b) Weighing the rare earth compound with the ratio of 5:1 to the amount of chitosan and the transition metal compound with the ratio of 2:1 to the amount of rare earth compound, respectively, to prepare 1.00mol / L Rare earth compound solution and 0.5mol / L transition metal compound solution;

[0048] c) Slowly add the rare earth compound solution and the transition metal compound solution prepared in step b) dropwise to the solution prepared in step a) at the same time, and the dropping rate is controlled at 60-80 drops / min;

[0049] d) Stirring and reacting at 25°C for 6 hours, the stirring speed was controlled at 600r / min;

[0050] e) After the reaction is completed, adjust the pH of the solution to 6-8, the complexed product is precipitated in the form of flocculent precipitates, filtered, a...

Embodiment 3

[0055] a) first weigh 1.00mmol high-density chitosan, dissolve it with 80mL of 1% acetic acid solution, then add water to dilute it until the pH of the solution is 4-6, and set aside;

[0056] b) Weigh the rare earth compound with the amount ratio of chitosan as 1:1 and the transition metal compound with the ratio of the amount of rare earth compound as 1:1 respectively, and prepare 0.1mol / L Rare earth compound solution and 0.05mol / L transition metal compound solution;

[0057] c) Slowly add the rare earth compound solution and the transition metal compound solution prepared in step b) dropwise to the solution prepared in step a) at the same time, and the dropping rate is controlled at 60-80 drops / min;

[0058] d) Stirring and reacting at 30°C for 4 hours, the stirring speed was controlled at 800r / min;

[0059] e) After the reaction is completed, adjust the pH of the solution to 7-8, the complexed product is precipitated in the form of flocculent precipitates, filtered, and t...

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Abstract

The present invention discloses an environmental purification material. The environmental purification material contains chitosan rare earth / transitional metal complex nano-particles generated by complexation of chitosan or chitosan derivative, rare earth ion and transitional metal ion; the diameter of the nano-particle is 10 to 100mm. The present invention is prepared by taking chitosan or chitosan derivative as the basic material, loading and bonding rare earth ion and transitional metal ion with bactericidal activity on chitosan or chitosan derivative by acidification treatment and stirring. The material of the present invention has the advantages of wide bactericidal spectrum, strong antibacterial ability, long antibacterial effect, stable antibacterial performance and no toxicity to human body. In addition, with low cost, abundant raw materials and being degradable, the material of the present invention is an environment-friendly environment purification material, which can be applied in the field of packaging material, architectural coating, fiber material, refreshing membrane, sports articles, plastics, ceramics, public sanitation and daily necessities.

Description

technical field [0001] The present invention relates to a kind of environmental purification material and its preparation method and application, in particular, relates to a kind of chitosan rare earth / transition metal ion complex generated by chitosan or chitosan derivatives, rare earth ions and transition metal ions Metal complexes and their preparation methods and applications. Background technique [0002] Environmental and health issues are major concerns of contemporary human beings. It is shocking that human deaths are frequently caused by bacterial infections including cholera, pneumonia, malaria, tuberculosis and hepatitis and other diseases all over the world. The sudden attack of the SARS virus in 2003 and the infection of enterovirus EV71 (hand, foot and mouth disease) in recent years have made people more aware of the fearfulness and harmfulness of bacteria and viruses. Therefore, the application of environmental purification materials to control and eliminate...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01N63/00A01N31/00A01P1/00C08B37/08
Inventor 何其庄杨自芳
Owner SHANGHAI NORMAL UNIVERSITY
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