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Nanometer silver wire and preparing method thereof

A nano-silver wire and preparation process technology, applied in nanotechnology, metal processing equipment, transportation and packaging, etc., can solve the problems of cumbersome process, low yield of nano-silver wire, production cost pressure, etc., and achieve uniform size distribution and shape Controllable appearance and size, good quality effect

Inactive Publication Date: 2017-06-27
CHONGQING ACADEMY OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing polyol technology has a cumbersome process and is only suitable for low-concentration systems, so the yield of silver nanowires is too low, and the silver nanowires produced contain a large number of by-products, which also causes pressure on production costs.

Method used

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  • Nanometer silver wire and preparing method thereof
  • Nanometer silver wire and preparing method thereof
  • Nanometer silver wire and preparing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Embodiment 1Cl-concentration is 15mmol / L

[0036] 5ml CuCl 2 (AR) 15mmol / L, 5ml PVP (AR) 0.15mol / L, 5ml AgNO 3 (AR) 0.1mol / L, weigh the raw materials according to this ratio, and dissolve them in ethylene glycol solvent respectively; then slowly add the prepared three solutions into 10ml of ethylene glycol solvent, and stir evenly, Then put it into a reaction kettle, raise the temperature to 140°C in an electric constant temperature blast drying oven, and keep it warm for 24 hours; naturally cool to room temperature, take it out and centrifugally purify to obtain the nano-silver product. Test spectra such as figure 1 shown.

[0037] Such as figure 1 The nano-silver obtained under the concentration shown is mainly spherical.

Embodiment 2

[0038] Embodiment 2Cl-concentration is 30mmol / L

[0039] 6ml NaCl (AR) 30mmol / L, 6ml PVP (AR) 0.15mol / L, 6ml AgNO 3 (AR) 0.1mol / L, weigh the raw materials according to this ratio, and dissolve them in ethylene glycol solvent respectively; then slowly add the prepared three solutions into 15ml of ethylene glycol solvent, and stir evenly, Then put it into the reaction kettle, raise the temperature to 160°C in an electric constant temperature blast drying oven, and keep it warm for 15 hours; naturally cool to room temperature, take it out and centrifugally purify to obtain the nano-silver product. Test spectra such as figure 2 shown.

[0040] Such as figure 2 The nano-silver wires obtained under the concentration shown in the figure are obviously increased and the particles are reduced.

Embodiment 3

[0041] Embodiment 3Cl-concentration is 45mmol / L

[0042] 6ml NaCl (AR) 45mmol / L, 6ml PVP (AR) 0.15mol / L, 6ml AgNO 3 (AR) 0.1mol / L, weigh the raw materials according to this ratio, and dissolve them in the propylene glycol solvent respectively; In the kettle, the temperature was raised to 140°C in a muffle furnace, and kept for 20 hours; naturally cooled to room temperature, taken out and purified by centrifugation to obtain silver nanowires. The test spectrum is shown in Figure 3. One of the nano-silver wires was selected for measurement, with a diameter of about 42nm, a length of about 46um, and an aspect ratio of 1095.

[0043] As shown in Figure 3, the nano-silver obtained under this concentration is mainly linear. The yield is as high as 90%, and the concentration of Cl- is optimal at this time.

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Abstract

The invention discloses a nanometer silver wire and a preparing method thereof. Cl- ions are led in the preparing process of the nanometer silver wire. The morphology and the size of the nanometer silver wire are controlled through the concentration of the Cl- ions, and the leading range of the Cl- concentration ranges from 15 mmol / L to 60 mmol / L. By means of the method, silver nitrate serves as the raw material, and a polyhydric alcohol method is used for reducing Ag+ in the silver nitrate, and the high-length-diameter-ratio nanometer silver wire is obtained. The diameter of the nanometer silver wire is smaller than 100 nm, and the length-diameter ratio of the nanometer silver wire is 1000. The disclosed method has the beneficial effects that raw materials are simple, the cost is low, operation is simple, the preparing efficiency is high, and the yield is high; and good application and industrial prospects are achieved.

Description

technical field [0001] The invention belongs to the field of nanomaterial production technology, and in particular relates to a production method capable of controlling the shape and size of nano silver wires by adjusting the concentration of Cl-. Background technique [0002] Nano-silver material, due to its small size and large specific surface area, has some special mechanical, optical, electrical, magnetic, biomedical, thermodynamic and catalytic properties. It is currently used in conductive pastes, optical devices, catalysis, medicine, etc. widely used in the field. [0003] At present, there are many methods for preparing silver nanowires, such as template method, photoreduction method, seed crystal method, hydrothermal method, microwave method, polyol method, etc. Among them, the polyol method is simple to operate, the reaction environment is friendly, and the raw materials are easy to obtain. favored by most people. However, the existing polyol technology has a cu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F1/00B22F9/24B82Y40/00
CPCB82Y40/00B22F9/24B22F1/0547
Inventor 陈晖李海利李瑞雪杨柳张娜曾斌文波张偌雨
Owner CHONGQING ACADEMY OF SCI & TECH
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