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Purification method for silver nanowire

A technology of silver nanowires and purification method, applied in nanotechnology and other directions, can solve problems such as time-consuming, and achieve the effects of easy availability of raw materials, simple operation process and low price

Inactive Publication Date: 2016-02-24
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The traditional purification process is usually cyclic centrifugation and decantation, and its disadvantage is that it is very time-consuming. However, the method of purifying nanowires by AC filtration needs to be controlled by many conditions, such as the size of fiber membrane nanowires, the size of the core, and the flow rate and effects of stress

Method used

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  • Purification method for silver nanowire
  • Purification method for silver nanowire
  • Purification method for silver nanowire

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Experimental program
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Embodiment 1

[0023] Silver nanowires were prepared by traditional polyol method (Sun, Y.G.; Xia, Y.N. Adv. Mater. 2002, 14, 833-837; Bergin, S.M.; Chen, Y.H.; Rathmell, A.R.; Charbonneau, P.; Li, Z.Y. ; Wiley, B.J. Nanoscale 2012, 4, 1996-2004.). figure 1 For the information of the prepared silver nanowires, it can be seen from the figure that the diameter of the prepared nanowires is about 20nm, and the diameter distribution is uniform.

Embodiment 2

[0025] A kind of purification method of silver nanowire, concrete steps are: the average diameter that will be synthesized by polyol method is 20 nanometers, the silver nanowire 0.02g that average length is 60 microns is dispersed in 10mL mass fraction and is 0.5% polyvinylpyrrolidone ( PVP) aqueous solution to obtain the silver nanowire dispersion, add acetone, its volume is 4 times of the silver nanowire dispersion, so that the silver nanowires are reunited, let stand for 10min, and remove the upper liquid. Repeat the above steps 3 times to obtain the purified silver nanowires. figure 2 This is the comparison chart after four times of purification, it can be seen that the purity of the nanowires has been significantly improved.

Embodiment 3

[0027] The nanowires were made into a uniform film on a glass substrate by the Meyerrod method, and its light transmittance and area resistance were tested. image 3 It shows that the purified nanowires show more excellent performance.

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Abstract

The invention provides a purification method for a silver nanowire. The purification method is characterized by comprising the steps that firstly, the silver nanowire is dispersed in a polyvinyl pyrrolidone (PVP) aqueous solution to obtain silver nanowire dispersion liquid, another kind of solvents is added to agglomerate the silver nanowire, still standing is carried out, and supernatant liquid is removed; and secondly, the first step is repeated three to five times, and the purified silver nanowire is obtained. By means of the method, the purity of the nanowire can be greatly improved. When the transmittance of the purified nanowire is 99.1%, the surface resistance is as low as 130 ohm. The needed raw materials are all common reagents, so that the operation method is simple and convenient. The purification method for the silver nanowire is simple, economical and easy to operate.

Description

technical field [0001] The invention relates to a method for purifying silver nanowires. Background technique [0002] Light-transmitting conductors can be used in various flat panel displays, touch screens, thin-film solar cells, organic light-emitting diodes (OLEDs), sensors, and antistatic coatings, and have gained increasing attention in recent years. Transparent conductor lines have proven to have better performance than ITO. Due to its low cost and high flexibility, silver nanowires are the best choice for transparent conductors. [0003] The polyol method has been developed as one of the most successful methods for the synthesis of Ag nanowires. However, the products obtained by the polyol process necessarily contain nanoparticulate impurities due to the formation and growth of heterogeneous nuclei. These nanoparticle impurities greatly reduce the electrical conductivity and transparent nanowire network. Therefore, the synthesized products need to be purified. Th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/24B82Y40/00
CPCB22F9/24B82Y40/00
Inventor 胡俊青任七龙李博黄小娟
Owner DONGHUA UNIV
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