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Preparation method for micron silver wires

A technology of silver wire and silver salt, applied in the field of micron-scale material preparation, can solve problems such as waste of resources, and achieve the effects of fewer processes, high yield and improved conversion rate

Active Publication Date: 2017-09-29
合肥微晶材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the micron silver filaments prepared by the known methods for preparing micron silver filaments all contain a large amount of micron silver particles, and the particles need to be removed through multiple centrifugation, resulting in a waste of a large amount of resources.

Method used

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  • Preparation method for micron silver wires
  • Preparation method for micron silver wires
  • Preparation method for micron silver wires

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The present embodiment prepares micron silver wire according to the following steps:

[0028] Add 2g of PVP to 100mL of glycerol at a temperature of 80°C to form a glycerol solution of PVP; after cooling the glycerol solution of PVP to room temperature naturally, add 0.4g of silver salt for the first time and mix well; then Heat up to 40°C, add 1mL of 500mmol / L sodium chloride in glycerol and mix well; then continue to heat up to 90°C, add 1mL of 300mmol / L tetrabutylammonium chloride in glycerol, and add 0.4g of silver salt, mix well; then continue to heat up to 160°C, keep the temperature for 30min, then add 0.4g of silver salt for the third time, continue to react at 160°C for 3h; after the reaction solution is cooled, use acetone, alcohol and deionized Settle the water and centrifuge to remove glycerol and PVP, and then dry at 80°C for 10 hours to obtain the target product micron silver wire. Or without drying, the micron silver filaments are preserved and used in t...

Embodiment 2

[0031] The present embodiment prepares micron silver wire in the same manner as in Example 1, the difference is only that the glycerol solution of 1mL 500mmol / L sodium chloride is replaced with the glycerol solution of 1.5mL 800mmol / L sodium bromide, and all the other conditions are the same. Change.

[0032] figure 2 It is an optical microscope picture of the micron silver wire obtained in this embodiment. In the figure, the micron silver wire has a diameter of 3-5 μm and a length of 500-600 μm, with good uniformity of diameter and length, high yield and few silver particles.

Embodiment 3

[0034] The present embodiment prepares micron silver wire according to the following steps:

[0035] Add 4g of PVP to 100mL of glycerol at a temperature of 80°C to form a glycerol solution of PVP; after cooling the glycerol solution of PVP to room temperature naturally, add 0.4g of silver salt for the first time and mix well; then Heat up to 40°C, add 1mL of 500mmol / L sodium chloride in glycerol and mix well; then continue to heat up to 90°C, add 1mL of 300mmol / L tetrabutylammonium chloride in glycerol, and add 0.4g of silver salt, mix well; then continue to heat up to 160°C, keep the temperature for 30min, then add 0.4g of silver salt for the third time, continue to react at 160°C for 3h; after the reaction solution is cooled, use acetone, alcohol and deionized Settle the water and centrifuge to remove glycerol and PVP, and then dry at 80°C for 10 hours to obtain the target product micron silver wire. Or without drying, the micron silver filaments are preserved and used in t...

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Abstract

The invention discloses a preparation method for micron silver wires. The preparation method comprises the steps that silver salt is added into a glycerol solution of PVP for three times, and meanwhile, alkali metal halide and tetrabutyl ammonium chloride are added so as to fully convert silver ions into the micron silver wires. The method has the advantages that silver particles contained in the micron silver wires prepared by the method are extremely few, the yield of the micron silver wires is high, procedures needed in the purification process are few, the preparation efficiency of the micron silver wires can be greatly improved, and further application of the micron silver wires in textiles or medical products can be facilitated.

Description

technical field [0001] The invention relates to the preparation of micron-scale materials, in particular to a method for preparing micron silver wires Background technique [0002] Silver metal has many unique properties, such as antibacterial, so it is widely used in textiles or medical supplies. Silver currently used in textiles and medical supplies is mainly prepared in the following ways: 1. Directly vapor-deposit silver on fabrics. This method uses a large amount of silver and the thickness of the vapor-deposited silver film is uneven, which will cause silver Waste, at the same time, evaporation will cause damage to the fabric and great environmental pollution; 2. Use the dipping method to soak the fabric in a solution containing nano-silver, so that the nano-silver is attached to the fabric fiber. The nano-silver used in this method The silver particle size is extremely small, and it is easy to penetrate into the human body through the skin and cause harm to the human...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/24
CPCB22F9/24B22F1/062
Inventor 张梓晗张运奇吕鹏
Owner 合肥微晶材料科技有限公司
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