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Redispersible silver nanowire mixture and preparation method thereof

A silver nanowire and redispersion technology, applied in nanotechnology, nanotechnology, nanotechnology, etc. for materials and surface science, can solve the problems of difficult hydrophobic medium matching, easy agglomeration, low concentration, etc., to achieve Realize long-term storage, improve agglomeration status, and good redispersion performance

Inactive Publication Date: 2015-10-28
游京晶
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, most of the commercially available silver nanowires appear in the form of dispersion liquid, the concentration is very low, and after a period of time, precipitation and agglomeration will occur, which is not conducive to storage and mass production. The reason is mainly due to the surface energy of silver nanowires. It is relatively high, easy to agglomerate, needs to be dispersed in a specific solvent, and it is difficult to achieve high concentration, and due to the large surface energy, it is difficult to match with hydrophobic media
[0004] Most of the existing technologies focus on the modification of micron-scale silver materials, and mainly for the treatment of powders. Compared with silver microspheres, silver nanowires have more special properties, and there is no relevant research on the surface modification of silver nanowires. reports on this issue

Method used

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preparation example Construction

[0032] This case also proposes a preparation method for this redispersible silver nanowire mixture, including:

[0033] Step 1) suspending 100 parts by weight of silver nanowires in a dispersion liquid, the dispersion liquid is selected from ethanol, ethylene glycol, propylene glycol, n-butanol, isopropanol, glycerol or a combination thereof;

[0034] Step 2) Add 10-20 parts by weight of a dispersant to the dispersion liquid, stir evenly to obtain a mixed liquid; the dispersant is selected from at least one of organosilicon compounds, ether groups or carboxyl groups or amino groups or carboxyl derivatives or amino derivatives. Macromolecular compounds of such groups, long-chain macromolecules containing at least one group in ether group or carboxyl group or amino group or carboxyl derivatives or amino derivatives, or a combination thereof;

[0035] Step 3) separating the silver nanowires by precipitation, filtration, centrifugation or distillation under reduced pressure. Dist...

Embodiment 1

[0037] Suspend silver nanowires with a total weight of 10 mg with an aspect ratio of 200 in 100 ml of ethanol; add 1 mg of γ-methacryloxypropyltrimethoxysilane to ethanol, stir well to obtain a mixed solution; then Distill the mixed solution under reduced pressure at 45-55° C. and -0.05-0.06 MPa until dry to obtain a solid silver nanowire mixture. After storage for 10 days, the above-obtained silver nanowire mixture was added to 100ml of ethanol or isopropanol, and stirred ultrasonically for 1 hour to obtain redispersed silver nanowires, whose stability time was measured to be greater than 3 months.

Embodiment 2

[0039] Suspend silver nanowires with a total weight of 10 mg with an aspect ratio of 1000 in 100 ml of ethanol; add 1 mg of γ-methacryloxypropyltrimethoxysilane to ethanol, stir well to obtain a mixed solution; then Distill the mixed solution under reduced pressure at 45-55° C. and -0.05-0.06 MPa until dry to obtain a solid silver nanowire mixture. After several days of storage, the above-obtained silver nanowire mixture was added to 100 ml of ethanol, and ultrasonically stirred for half an hour to obtain redispersed silver nanowires with a stable time of more than 3 months.

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PUM

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Abstract

The invention discloses a redispersible silver nanowire mixture and a preparation method thereof. The redispersible silver nanowire mixture comprises a silver nanowire and a dispersing agent, wherein the dispersing agent comprises an organic silicon compound, a high molecular compound containing at least one group of ether or carboxyl or amido or carboxyl derivative or amido derivative, and a long chain macromolecule containing at least one group of ether or carboxyl or amido or carboxyl derivative or amido derivative, or a combination thereof. As the surface modification is performed for the silver nanowire, the surface energy of the silver nanowire is prominently reduced to realize the hydrophobic / hydrophilic property, and the agglomeration condition of the silver nanowire in a solution is improved; and the silver nanowire also can be prepared to a state of such solid fixtures as powder or paste, so that the long-time preservation of the silver nanowire is realized, and the silver nanowire can achieve excellent redispersibility in an organic solvent.

Description

technical field [0001] The invention relates to a surface modification of silver nanowires, in particular to a redispersible silver nanowire mixture and a preparation method thereof. Background technique [0002] Silver nanowires are materials that are in the range of nanometers in at least one dimension. This material has excellent electrical conductivity, antibacterial properties and catalytic properties, and has a wide range of potential applications, especially silver nanowires, which can be used to prepare Flexible transparent electrodes are used to replace ITO conductive glass, and the prepared transparent conductive film has higher conductivity and transparency, and is suitable for large-scale roll-to-roll production. [0003] At present, most of the commercially available silver nanowires appear in the form of dispersion liquid, the concentration is very low, and after a period of time, precipitation and agglomeration will occur, which is not conducive to storage and...

Claims

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Application Information

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IPC IPC(8): B22F1/00B82Y30/00B82Y40/00
Inventor 游宇健贾永军
Owner 游京晶
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