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Preparation of halloysite loaded nano-silver antibacterial material

A nano-silver antibacterial, halloysite technology, applied in the fields of botanical equipment and methods, chemicals for biological control, animal repellents, etc.

Active Publication Date: 2014-07-16
JINING XINRUIDA INFORMATION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing technology only loads nano-silver particles on the outer surface of halloysite, and the inner surface area is huge, which can have better antibacterial effect

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Halloysite with a purity of not less than 80wt% was added to 5wt% nitric acid solution, the solid-to-liquid ratio of the reaction system was 10% by mass, stirred at room temperature for 8 hours, centrifugally dehydrated and dried to obtain acid-treated halloysite, After treatment, the aluminum oxide compound in the inner layer of halloysite is dissolved, and the inner diameter of the pipe becomes larger; 2g of silver nitrate is dissolved in 100mL of ethanol to prepare silver nitrate ethanol solution; 8g of acid-treated halloysite is placed in vacuum filtration In the bottle, a magnetic stirring rotor is placed in the vacuum filtration bottle, the side of the vacuum filtration bottle is connected to a vacuum pump, and the mouth of the vacuum filtration bottle is connected to the separatory funnel through a rubber stopper, which acts as a seal, so that the separatory funnel and the vacuum The suction filter bottles are tightly connected, and the cock of the separatory funn...

Embodiment 2

[0016] Halloysite with a purity of not less than 80wt% was added to 1wt% nitric acid solution, the solid-to-liquid ratio of the reaction system was 5% by mass, stirred at room temperature for 4 hours, centrifuged and dehydrated and dried to obtain acid-treated halloysite, After treatment, the aluminum oxide compound in the inner layer of halloysite is dissolved, and the inner diameter of the pipe becomes larger; 2g of silver nitrate is dissolved in 80mL of ethanol to prepare silver nitrate ethanol solution; 4g of acid-treated halloysite is placed in vacuum filtration In the bottle, a magnetic stirring rotor is placed in the vacuum filtration bottle, the side of the vacuum filtration bottle is connected to a vacuum pump, and the mouth of the vacuum filtration bottle is connected to the separatory funnel through a rubber stopper, which acts as a seal, so that the separatory funnel and the vacuum The suction filter bottles are tightly connected, and the cock of the separatory funn...

Embodiment 3

[0018] Add halloysite with a purity of not less than 80wt% to 5wt% nitric acid solution, the solid-to-liquid ratio of the reaction system is 8% by mass, stir at room temperature for 8 hours, centrifuge, dehydrate and dry to obtain acid-treated halloysite, After treatment, the aluminum oxide compound in the inner layer of halloysite is dissolved, and the inner diameter of the pipe becomes larger; 2g of silver nitrate is dissolved in 100mL of ethanol to prepare silver nitrate ethanol solution; 8g of acid-treated halloysite is placed in vacuum filtration In the bottle, a magnetic stirring rotor is placed in the vacuum filtration bottle, the side of the vacuum filtration bottle is connected to a vacuum pump, and the mouth of the vacuum filtration bottle is connected to the separatory funnel through a rubber stopper, which acts as a seal, so that the separatory funnel and the vacuum The suction filter bottles are tightly connected, and the cock of the separatory funnel is closed; pu...

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PUM

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Abstract

The invention discloses a preparation method of a halloysite loaded nano-silver antibacterial material. The preparation method comprises the following specific steps: adding halloysite with purity not lower than 80wt% into a nitric acid solution, stirring at normal temperature for 4-8 hours to obtain acid treated halloysite, putting the product in a vacuum filter suction bottle, mixing the product with a silver nitrate ethanol solution in vacuum, communicating the bottle with atmosphere to enable silver nitrate to fully enter a halloysite tube at atmospheric pressure, stirring for 2-3 hours again to achieve solid-liquid separation, and drying in vacuum at 70-80 DEG C; and putting the dried product in a vacuum tube furnace, vacuumizing and heating the product to 400-550 DEG C at a heating speed of 5-50 DEG C / min, calcining for 2-4 hours before stopping heating, cooling to room temperature, and stopping vacuumizing to obtain the halloysite loaded nano-silver antibacterial material. The preparation method disclosed by the invention has the advantages that silver nitrate can enter the halloysite tube, and is decomposed in vacuum by high temperature to obtain elemental nano-silver particles. The process can be used for ensuring that the nano-silver particles exist in the halloysite tube.

Description

technical field [0001] The invention relates to the preparation of halloysite-loaded nano-silver antibacterial material. Background technique [0002] The antibacterial effect of silver nanoparticles has a broad spectrum, and has a good inhibitory effect on different bacterial species. It has a bactericidal effect on common bacteria on the surface of burns, scalds and wounds, such as Staphylococcus aureus, Escherichia coli, Pseudomonas aeruginosa, Candida albicans and other Gram-positive and Gram-negative bacteria; it has a bactericidal effect on Chlamydia trachomatis, Neisseria gonorrhoeae, which cause sexually transmitted diseases, also have a strong bactericidal effect. However, the surface activity of nanoparticles is very high, and they are easy to agglomerate. To obtain a good surface antibacterial effect, nano-silver must be loaded or modified. [0003] Halloysite is also known as kaolinite. The chemical composition is the same as kaolinite, with the same 1:1 SiO ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01N59/16A01N25/08A01P1/00
Inventor 马建锋邹静李良银姚超
Owner JINING XINRUIDA INFORMATION TECH CO LTD