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Antibacterial application of polycrystalline nanometer calcium-aluminum oxide

A technology of aluminum oxide and nano-calcium, applied in application, animal repellent, plant growth regulator, etc., can solve the problems of undiscovered and harsh synthesis conditions

Inactive Publication Date: 2009-09-02
UNIV OF SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing preparation method of C12A7 and its derivatives is to utilize CaCO 3 and γ-Al 2 o 3 It is synthesized in different atmospheres (such as oxygen, hydrogen, fluorine, etc.) and under high-temperature calcination conditions above 1350°C. The synthesis conditions are harsh (for example, 200-300atm pellets are required, high-temperature calcination above 1350°C), and synthetic samples often contain Other impurities (such as C5A3, etc.); In addition, so far, no reports have been found on the use of C12A7 and its derivatives as antibacterial materials

Method used

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  • Antibacterial application of polycrystalline nanometer calcium-aluminum oxide
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  • Antibacterial application of polycrystalline nanometer calcium-aluminum oxide

Examples

Experimental program
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Effect test

Embodiment 1

[0017] Example 1 Preparation of Polycrystalline Nano Calcium Aluminum Oxide

[0018] In 200ml concentration of 0.2g / ml citric acid aqueous solution, add 2.48g calcium nitrate (Ca(NO 3 ) 2 4H 2 O) (purity: analytically pure) and 4.60g aluminum nitrate (Al(NO 3 ) 3 9H 2 O) (purity: analytically pure) then add 0.5g polyethylene glycol surfactant (purity: analytically pure), control the water bath temperature at 70°C, and continuously stir at a speed of 200r / min until dissolved to obtain a clear solution;

[0019] Add 50ml of ethylene glycol (purity: analytically pure) to the solution, and stir continuously at a speed of 200r / min for 2 hours to form a calcium-aluminum salt sol; stand at 90°C for 24 hours to form a calcium-aluminum salt gel; The glue is heated to 350°C in the air atmosphere and kept for 2 hours to form a blocky solid; grind the blocky solid into particles with a particle size of less than 0.15mm; place the ground particles in an open quartz container Into the...

Embodiment 2

[0020] Example 2 Preparation of Polycrystalline Nano Calcium Aluminum Oxide

[0021] In 200ml concentration of 0.2g / ml citric acid aqueous solution, add 24.80g calcium nitrate (Ca(NO 3 ) 2 4H 2 O) (purity: analytically pure) and 45.95g aluminum nitrate (Al(NO 3 ) 3 9H 2 (0) (purity: analytically pure) then add 0.5g polyethylene glycol surfactant (purity: analytically pure), control the water bath temperature at 80°C, and continuously stir at a speed of 500r / min until it dissolves to obtain a clear solution; Add 120ml of ethylene glycol (purity: analytically pure) to the solution, and stir continuously at a speed of 500r / min for 2 hours to form a calcium-aluminum salt sol; stand at 90°C for 24 hours to form a calcium-aluminum salt gel; Heating to 400°C in an air atmosphere and keeping it warm for 1 hour to form a blocky solid; grind the blocky solid into particles with a particle size of less than 0.15mm, put the ground particles into an open quartz container and put them ...

Embodiment 3  test Embodiment 2

[0022] Embodiment 3 Test embodiment 2 sample to the killing effect of Staphylococcus aureus

[0023] (1) Weigh the 35nm ± 15nm polycrystalline calcium aluminum oxide powder sample prepared in Example 2, and sterilize it at 120° C. for 5 hours for later use;

[0024] (2) Put the mixed cellulose ester microporous filter membrane (Shanghai Xingya Purification Material Factory, specification: φ50mm, pore size: 0.45μm) in a petri dish covered with color-changing silica gel, and sterilize it at 120°C for 5 hours , take 6 pieces of the same area for spare;

[0025] (3) Use a sterile inoculation shovel to gently scratch the Staphylococcus aureus inoculated on the nutrient agar plate (provided by the China Common Microorganism Culture Collection Management Center), add 5ml sterile normal saline, and then use a sterile micropipette The liquid was sucked out and added to the centrifuge tube, then placed in a centrifuge (4000rpm) and centrifuged for 5 minutes to obtain a pure bacterial s...

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Abstract

The invention relates to an inorganic antibacterial material, in particular to an antibacterial application of a polycrystalline nanometer calcium-aluminum oxide of C12A7-O<->. The antibacterial material has broad-spectrum bacteriostatic and bactericidal actions, i.e. has the action for exterminating golden staphylococcus, colon bacilli and hay bacillus black spore varieties at a room temperature. The polycrystalline nanometer calcium-aluminum oxide has an extermination rate of 100 percent per hour for the golden staphylococcus and the colon bacilli and has an extermination rate of 96 percent per hour for the hay bacillus black spore varieties when a load weight on a unit area of a load material is heavier than or equal to 0.005g / cm<2>; the grain diameter of the polycrystalline nanometer calcium-aluminum oxide is 10- 200nm, the load material can be textile, plastic products, ceramics, rubber products, or the like, and the room temperature means natural room-temperature conditions in four seasons. The polycrystalline nanometer calcium-aluminum oxide has the advantages of strong antibacterium function, no toxicity, high temperature resistance and strong stability and can be widely applied to fields, such as antibacterial textile, antibacterial plastics or ceramics, rubber products, and the like.

Description

technical field [0001] The invention relates to an inorganic antibacterial material, in particular to a polycrystalline nano calcium aluminum oxide C12A7-O - The material is used for the purpose of killing bacteria. Background technique [0002] Bacteria and viruses have always accompanied the development of human society. In the past few decades, due to the increase in population and the destruction of the ecological environment, the impact of previously controlled diseases and mutated pathogens on human health has been increasing, such as Mycobacterium Tuberculosis, atypical pneumonia (SARS) coronavirus, H5N1 avian influenza virus, etc., so far, there have been many large-scale outbreaks of infectious diseases in the world, which have greatly affected the normal economic life order and health of human beings. Relevant reports from the World Health Organization show that three-quarters of the world's annual deaths are directly caused by bacterial and viral infections, and...

Claims

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Application Information

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IPC IPC(8): A01N59/06A01P1/00D06M11/45D06M11/44C08K3/22C04B41/85
Inventor 李全新宫璐林舟袁丽霞鸟本善章
Owner UNIV OF SCI & TECH OF CHINA
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