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Method for green preparing of high-draw-ratio silver nano wire through composite soft template process

A high aspect ratio, silver nanowire technology, applied in the field of preparation of noble metal nanomaterials, can solve the problems of complex preparation process, many reaction by-products, high energy consumption, etc., and achieve simple preparation method, good uniformity and high purity Effect

Active Publication Date: 2019-08-30
江苏汇诚医疗科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, most of the methods for preparing silver nanowires by means of the soft template method use organic reagents such as ethylene glycol and glycerin as solvents, and reduce the mixed solution of silver salt and polyvinylpyrrolidone (PVP) under high temperature (greater than 160 °C) conditions. Preparation of nanomaterials, the preparation process is complex, high energy consumption, and many reaction by-products, low yield
[0005] Gallic acid (3,4,5-trihydroxybenzoic acid, formula C 7 h 6 o 5 ) belongs to polyphenolic compounds, which widely exist in plants such as Rhubarb palmatum, Eucalyptus eucalyptus, dogwood, etc. It has good antioxidant activity and is also a good green reducing agent, and it is used in silver nanowires with high aspect ratio There are few reports on the preparation methods of

Method used

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  • Method for green preparing of high-draw-ratio silver nano wire through composite soft template process
  • Method for green preparing of high-draw-ratio silver nano wire through composite soft template process
  • Method for green preparing of high-draw-ratio silver nano wire through composite soft template process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] 1) Under stirring conditions, weigh 30.0 g of polyvinyl alcohol (polymerization degree is 1700, alcoholysis degree is 98%) and slowly add 900 mL of deionized water at 25±2°C, fully stir and disperse for 15 minutes, then gradually raise the temperature to Incubate at 95°C for 30 minutes, cool naturally after the polyvinyl alcohol is completely dissolved, then dilute to 1000 mL, and prepare a polyvinyl alcohol aqueous solution with a mass concentration of 3.0%.

[0043] Weigh 11.8 g of succinic acid in 100 mL of deionized water, and dissolve to obtain an aqueous solution of succinic acid.

[0044] Under the condition of stirring, add 100 mL of polyvinyl alcohol solution to the aqueous solution of succinic acid, and after mixing thoroughly, set the volume to 1000 mL, adjust its pH value to 5.4, and obtain the mixed soft template of succinic acid-polyvinyl alcohol solution.

[0045] Weigh 3.398 g of silver nitrate and dissolve it in 100 mL of deionized water to prepare a s...

Embodiment 2

[0050] 1) Under the condition of stirring, weigh 10.0 g of polyvinyl alcohol buffer (polymerization degree is 1800, alcoholysis degree is 96%) and slowly add it into 900 mL of deionized water at 25±2°C, fully stir and disperse for 10 minutes, then gradually increase the temperature Incubate at 95°C for 20 minutes, cool naturally after the polyvinyl alcohol is completely dissolved, then set the volume to 1000 mL, and prepare a polyvinyl alcohol aqueous solution with a mass concentration of 1.0% for use.

[0051] Weigh 13.2 g of glutaric acid in 100 mL of deionized water, and dissolve to obtain glutaric acid aqueous solution. Oxalic acid can also be substituted for glutaric acid in this example.

[0052] Under the condition of stirring, add 100 mL of polyvinyl alcohol solution to the glutaric acid aqueous solution, after mixing thoroughly, set the volume to 1000 mL, adjust its pH to 5.2, and obtain the mixed solution of glutaric acid-polyvinyl alcohol composite soft template . ...

Embodiment 3

[0058] 1) Under stirring conditions, weigh 50.0 g of polyvinyl alcohol (polymerization degree is 1700, alcoholysis degree is 96%) and slowly add 900ml of deionized water at about 25°C, fully stir and disperse for 15 minutes, then gradually raise the temperature to 95°C Keep warm at ℃ for 30 minutes, cool naturally after the polyvinyl alcohol is completely dissolved, then set the volume to 1000 ml, and prepare a polyvinyl alcohol aqueous solution with a mass concentration of 5.0%.

[0059] Weigh 5.0 g of malonic acid and 15 g of adipic acid in 100 mL of deionized water, dissolve them to obtain malonic acid-adipic acid aqueous solution.

[0060] Under the condition of stirring, add 100 ml of polyvinyl alcohol solution to the aqueous solution of malonic acid-adipic acid, after mixing thoroughly, set the volume to 1000 ml, adjust its pH value to 5.5, and obtain malonic acid-adipic acid- Mixed solution of polyvinyl alcohol composite soft template.

[0061] Weigh 16.55 g of silver ...

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Abstract

The invention discloses a method for green preparing of a high-draw-ratio silver nano wire through the composite soft template process, and belongs to the technical field of noble metal nano materialpreparing. An organic diacid water solution, a polyvinyl alcohol water solution and deionized water are mixed firstly, the pH value of a mixing system is adjusted to range from 2 to 6.5, and an organic diacid-polyvinyl alcohol composite soft template mixed solution is prepared; then, a silver saline solution, a gallic acid water solution and the organic diacid-polyvinyl alcohol composite soft template mixed solution are evenly mixed, the reaction is conducted under the condition of low-speed stirring, a solid-phase reaction product is obtained, washing is conducted through an ethyl alcohol water solution, and accordingly the high-draw-ratio silver nano wire is obtained. The high-draw-ratio silver nano wire prepared through the method is high in purity and good in uniformity, the preparingmethod is simple and easy to operate, the characteristics that the yield is high, cost is low, and environment friendliness is achieved are achieved, and the obtained high-draw-ratio silver nano wirehas good antimicrobial activity.

Description

technical field [0001] The invention belongs to the technical field of preparation of noble metal nanometer materials. Background technique [0002] High-aspect-ratio silver nanowires are different from ordinary nano-silver particles. They combine the unique physical and chemical properties of noble metals with the structure of high-aspect-ratio silver nanowires. It is used in plasma imaging, transparent conductive film, solar cell, touch screen, electronic circuit, printed electronic technology and other fields, and has become a research hotspot in the material field. [0003] The preparation methods of silver nanowires with high aspect ratio disclosed in the existing literature mainly include liquid phase chemical reduction method, soft template method, photochemical method and electrochemical method. Soft templates are usually soft templates constructed of biological protein molecules, plant cells, polymers, etc., to control the synthesis of nanomaterials with a certain ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/24B22F1/00B82Y30/00B82Y40/00
CPCB22F9/24B82Y30/00B82Y40/00B22F1/0547B22F1/07
Inventor 沈明沈培培张金贵徐沈扬
Owner 江苏汇诚医疗科技有限公司
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