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Method of forming and immobilizing metal nanoparticles on substrates and the use thereof

A technology of metal nanoparticles and metal ions, applied in chemical instruments and methods, metal material coating technology, textiles and papermaking, etc., can solve the problem of metal leakage into the environment

Active Publication Date: 2013-12-18
AGPLUS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Any method of immobilizing a matrix of metal nanoparticles that comes into contact with a fluid (e.g. a liquid) risks leaking the metal into the environment

Method used

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  • Method of forming and immobilizing metal nanoparticles on substrates and the use thereof
  • Method of forming and immobilizing metal nanoparticles on substrates and the use thereof
  • Method of forming and immobilizing metal nanoparticles on substrates and the use thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0066] Embodiment 1: the preparation of epoxidized cellulose

[0067] 1 kg of commercially available powdered cellulose (Sigma-Aldrich) was stirred in 5 liters of aqueous sodium hydroxide (1.5M) at 60°C. 1 L of epichlorohydrin was added to the reaction mixture and stirred vigorously for 2 hours. The reaction mixture was filtered and the solid residue ("epoxidized cellulose") was washed three times with distilled water. Dry epoxidized cellulose can be obtained by vacuum drying.

Embodiment 2

[0068] Embodiment 2: prepare nano-silver cellulose

[0069] 150 g of the epoxidized cellulose prepared in Example 1 were stirred in 1 liter of water. 200 ml of hexanediamine (70% in water) was added in one portion, and the reaction mixture was stirred for 2 hours and drained. The solid residue ("aminocellulose") was washed three times with distilled water.

[0070] The resulting wet aminocellulose was redispersed in 1 liter of silver nitrate aqueous solution (0.1 M) and stirred for 3 hours. The reaction mixture was filtered and the solid residue was washed 3 times with distilled water before reduction to metal nanoparticles. The solid residue was dispersed in 1 liter of water at room temperature. To the mixture was added 100 ml of aqueous hydrazine (0.5 M) in one portion and stirred at room temperature for 3 hours. The reaction mixture was filtered and the solid residue ("nanosilver aminocellulose") was washed 3 times with distilled water. After vacuum drying, 170 grams o...

Embodiment 3

[0071] Embodiment 3: prepare nano-silver cellulose

[0072] 150 g of the epoxidized cellulose prepared in Example 1 was stirred in 1 liter of aqueous sodium carbonate (2.0 M). Add 100 grams of iminodiacetic acid at one time. The reaction mixture was stirred at 60° C. for 12 hours and filtered off with suction. The solid residue ("acidified cellulose") was washed three times with distilled water.

[0073] The wet acidified cellulose obtained was redispersed in 1 liter of silver nitrate aqueous solution (0.1M) and stirred for 3 hours. The reaction mixture was filtered and the solid residue was washed 3 times with distilled water before reduction to metal nanoparticles. The solid residue was dispersed in 1 liter of water at room temperature. 200 ml of aqueous sodium borohydride (0.6 M) was added in one portion to the reaction mixture and stirred at room temperature for 4 hours. The reaction mixture was filtered and the solid residue ("nanosilverated cellulose") was washed 3 ...

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Abstract

A new, facile, low cost and easy-to-operate method of forming and immobilizing metal nanoparticles on substrates is invented. The method comprises steps of chemical modification of the substrates with chemical linkers, chelation of the metal ions to the modified substrates, the washing of the unbound metal ions and in-situ reduction of the metal ions to produce metal nanoparticles on the substrates with / without the finishing treatment of the metal nanoparticles functionalized substrates with minimum particles aggregations. The metal nanoparticles functionalized substrates generated by the method have wide applications, for example, as anti-microbial agents. The metal nanoparticles are strongly bonded to the substrates, resulting in low metal leaching to the environment.

Description

technical field [0001] The present invention relates to a method for preparing and immobilizing metal nanomaterial particles on a substrate and the application of such a substrate on which metal nanoparticles are fixed. Background technique [0002] As antibacterial agents, catalysts, high value-added dyes, photocatalysts, sensors, and electromagnetic shielding technologies, metal nanoparticles have attracted extensive attention in terms of their synthesis and the application of the resulting materials. [0003] For example: nano-silver is currently known as the most concerned antibacterial nanostructure, and its development is very rapid. Materials containing nanosilver have been used in a variety of products in the global market, which can provide additional antibacterial, antifungal and antiviral effects, and related products have created a market of about 45 billion US dollars in 2010 alone. [0004] Currently, there are many methods and processes for preparing silver n...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C18/18C23C18/20B22F9/24
CPCC02F1/002C02F1/283C02F1/505C02F2201/006D06M23/08D06M11/83C08B15/06C02F1/50
Inventor 刘洪均金子雨刘浥宁
Owner AGPLUS TECH
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