CN105345022A - Purification method for silver nanowire - Google Patents
Purification method for silver nanowire Download PDFInfo
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- CN105345022A CN105345022A CN201510690210.2A CN201510690210A CN105345022A CN 105345022 A CN105345022 A CN 105345022A CN 201510690210 A CN201510690210 A CN 201510690210A CN 105345022 A CN105345022 A CN 105345022A
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- nano silver
- silver wire
- purification
- silver nanowire
- wire
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/16—Making metallic powder or suspensions thereof using chemical processes
- B22F9/18—Making metallic powder or suspensions thereof using chemical processes with reduction of metal compounds
- B22F9/24—Making metallic powder or suspensions thereof using chemical processes with reduction of metal compounds starting from liquid metal compounds, e.g. solutions
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B82—NANOTECHNOLOGY
- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- B82Y40/00—Manufacture or treatment of nanostructures
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
The present invention relates to a kind of method of purification of nano silver wire.
Background technology
Printing opacity conductor can be used for the fields such as various FPD, touch-screen, thin-film solar cells, Organic Light Emitting Diode (OLED), sensor and antistatic coating, obtains increasing concern in recent years.Transparent conductor line is verified performance more better than ITO.Owing to having low cost and high-flexibility, nano silver wire is the optimal selection doing transparent conductor.
Polyxol method has been developed to the method that is the most successfully synthesized Ag nano wire.But due to formation and the growth of the core of isomery, the product obtained by polyxol method must contain nano particle impurity.These nano particle impurity greatly reduce electrical conductivity and transparent nanometer line network.Therefore, the product needed after synthesis purifies.Traditional purification process is generally circular centrifugal and decant, and its shortcoming is very consuming time, and adopts the method exchanging filtration, purification nano wire, need the control being subject to many conditions, such as tunica fibrosa nanowire size, the size of core, and the impact of flow velocity and pressure.
Summary of the invention
The object of this invention is to provide a kind of method of purification of nano silver wire, this method of purification step is simple, with low cost, and after purification, the purity of nano wire is higher.
In order to achieve the above object, the invention provides a kind of method of purification of nano silver wire, it is characterized in that, comprising:
The first step: be dispersed in by nano silver wire in polyvinylpyrrolidone (PVP) aqueous solution and obtain nano silver wire dispersion liquid, add another kind of solvent, nano silver wire is reunited, leaves standstill, and removes supernatant liquid;
Second step: repeat first step 3-5 time, obtains the nano silver wire after purifying.
Preferably, the mass fraction < 2% of described polyvinylpyrrolidone (PVP) aqueous solution.
Preferably, described another kind of solvent is weak polar solvent.
Preferably, described another kind of solvent is acetone, and its volume is 2-5 times of nano silver wire dispersion liquid.
Preferably, the w/v of described nano silver wire and polyvinylpyrrolidone (PVP) aqueous solution is 10-20mg: 20mL.
Preferably, the average diameter of described nano silver wire is 20 nanometers, and average length is 60 microns.
Preferably, described nano silver wire is the nano silver wire adopting polyxol method synthesis.
Preferably, the described time left standstill is 5-15min.
Compared with prior art, the invention has the beneficial effects as follows:
1, this invention exploits the method for selective precipitation purification Ag nano wire, this purification method is simple, with low cost.After purification, the purity of nano wire greatly improves, and the performance of the original nano wire of Performance Ratio of the Ag nano wire after purifying is significantly improved, and the nano wire of purifying is when transmitance is 99.1%, and face resistance is low to moderate 130 ohm, and the lower transmitance of identical faces resistance improves 4%.
2, the raw material that the present invention is all is common agents, and get final product purifying nano silver wire with simple experimental procedure and device, the nano silver wire purity after purification is significantly improved, and its nano silver wire of not purifying as transparent conductor Performance Ratio also improves accordingly.The advantages such as this purification process has environmental friendliness, required raw material are easy to get, cheap, operating process is easy.
Accompanying drawing explanation
Fig. 1 is that the nano silver wire SEM prepared in the present invention schemes and grain size distribution.
Fig. 2 is SEM and the dark field optical microscope figure of nano silver wire purification front and back in the present invention.Wherein, A is the SEM figure before purification, B is that the SEM after purifying schemes, and C is the dark field optical microscope figure before purifying, D is the dark field optical microscope figure after purification.
Fig. 3 is the transmitance-face resistance curve of front and back nano silver wire as transparency electrode of purifying in the present invention.
Detailed description of the invention
Below in conjunction with specific embodiment, set forth the present invention further.Should be understood that these embodiments are only not used in for illustration of invention to limit the scope of the invention.In addition should be understood that those skilled in the art can make various changes or modifications the present invention, and these equivalent form of values fall within the application's appended claims limited range equally after the content of having read the present invention's instruction.
Embodiment 1
Conventional polyol method is adopted to obtain nano silver wire (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.Nanoscale2012,4,1996-2004.).Fig. 1 is the information of obtained nano silver wire, and as can be seen from the figure, the diameter of obtained nano wire is about 20nm, and diameter is evenly distributed.
Embodiment 2
A kind of method of purification of nano silver wire, concrete steps are: be 20 nanometers by the average diameter of being synthesized by polyxol method, average length is that to be dispersed in 10mL mass fraction be obtain nano silver wire dispersion liquid in polyvinylpyrrolidone (PVP) aqueous solution of 0.5% to the nano silver wire 0.02g of 60 microns, add acetone, its volume is 4 times of nano silver wire dispersion liquid, nano silver wire is reunited, leaves standstill 10min, remove supernatant liquid.Repeat above-mentioned steps 3 times, obtain the nano silver wire after purifying.Fig. 2 is the comparison diagram after purification 4 times, can see that the purity of nanowire is significantly improved.
Embodiment 3
On a glass substrate nano wire is made uniform film by Meyerrod method, test its light transmittance and face hinders.Fig. 3 shows, the nano wire after purification shows more excellent performance.
Claims (7)
1. a method of purification for nano silver wire, is characterized in that, comprising:
The first step: be dispersed in by nano silver wire in aqueous povidone solution and obtain nano silver wire dispersion liquid, adds another kind of solvent, and nano silver wire is reunited, and leaves standstill, and removes supernatant liquid;
Second step: repeat first step 3-5 time, obtains the nano silver wire after purifying.
2. the method for purification of nano silver wire as claimed in claim 1, is characterized in that, the mass fraction < 2% of described aqueous povidone solution.
3. the method for purification of nano silver wire as claimed in claim 1, it is characterized in that, described another kind of solvent is acetone, and its volume is 2-5 times of nano silver wire dispersion liquid.
4. the method for purification of nano silver wire as claimed in claim 1, it is characterized in that, described nano silver wire and the w/v of aqueous povidone solution are 10-20mg: 20mL.
5. the method for purification of nano silver wire as claimed in claim 1, it is characterized in that, the average diameter of described nano silver wire is 20 nanometers, and average length is 60 microns.
6. the method for purification of nano silver wire as claimed in claim 1, is characterized in that, described nano silver wire is the nano silver wire adopting polyxol method synthesis.
7. the method for purification of nano silver wire as claimed in claim 1, is characterized in that, the described time left standstill is 5-15min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510690210.2A CN105345022A (en) | 2015-10-22 | 2015-10-22 | Purification method for silver nanowire |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510690210.2A CN105345022A (en) | 2015-10-22 | 2015-10-22 | Purification method for silver nanowire |
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| CN105345022A true CN105345022A (en) | 2016-02-24 |
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| CN201510690210.2A Pending CN105345022A (en) | 2015-10-22 | 2015-10-22 | Purification method for silver nanowire |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106001544A (en) * | 2016-07-08 | 2016-10-12 | 合肥微晶材料科技有限公司 | Method for purifying silver nanowires through settling separation |
| CN107127333A (en) * | 2017-05-22 | 2017-09-05 | 哈尔滨工业大学 | A kind of method by vibrating and settling purification nano silver wire |
| CN107398563A (en) * | 2017-07-25 | 2017-11-28 | 中南大学 | A kind of method of regulation and control nano silver wire length |
| CN109482900A (en) * | 2018-12-14 | 2019-03-19 | 浙江加州国际纳米技术研究院台州分院 | A kind of method high-volume synthesis and efficiently purify ultra-fine silver nanowires |
| CN110814361A (en) * | 2019-11-08 | 2020-02-21 | 惠州达祺光电科技有限公司 | Silver nanowire purification method |
| CN113084155A (en) * | 2021-03-30 | 2021-07-09 | 重庆烯宇新材料科技有限公司 | Green, mild and efficient purification method of nano silver wires |
| CN113084154A (en) * | 2021-03-29 | 2021-07-09 | 重庆烯宇新材料科技有限公司 | Method for efficiently purifying nano silver wires |
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| JP2009299162A (en) * | 2008-06-16 | 2009-12-24 | Fujifilm Corp | Silver nanowire, method for producing the same, water base dispersion product and transparent conductor |
| CN101934378A (en) * | 2010-09-10 | 2011-01-05 | 浙江大学 | High-concentration fast preparation method for silver nanowires |
| CN103203467A (en) * | 2013-04-17 | 2013-07-17 | 苏州冷石纳米材料科技有限公司 | Method for preparing silver nanowires |
| CN103338882A (en) * | 2010-12-07 | 2013-10-02 | 罗地亚管理公司 | Electrically conductive nanostructures, method for making such nanostructures, electrically conductive polymer films containing such nanostructures, and electronic devices containing such films |
| CN103785842A (en) * | 2014-01-16 | 2014-05-14 | 复旦大学 | Nanocrystalline metal elementary substance separation method |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2009299162A (en) * | 2008-06-16 | 2009-12-24 | Fujifilm Corp | Silver nanowire, method for producing the same, water base dispersion product and transparent conductor |
| CN101934378A (en) * | 2010-09-10 | 2011-01-05 | 浙江大学 | High-concentration fast preparation method for silver nanowires |
| CN103338882A (en) * | 2010-12-07 | 2013-10-02 | 罗地亚管理公司 | Electrically conductive nanostructures, method for making such nanostructures, electrically conductive polymer films containing such nanostructures, and electronic devices containing such films |
| CN103203467A (en) * | 2013-04-17 | 2013-07-17 | 苏州冷石纳米材料科技有限公司 | Method for preparing silver nanowires |
| CN103785842A (en) * | 2014-01-16 | 2014-05-14 | 复旦大学 | Nanocrystalline metal elementary substance separation method |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106001544A (en) * | 2016-07-08 | 2016-10-12 | 合肥微晶材料科技有限公司 | Method for purifying silver nanowires through settling separation |
| CN107127333A (en) * | 2017-05-22 | 2017-09-05 | 哈尔滨工业大学 | A kind of method by vibrating and settling purification nano silver wire |
| CN107127333B (en) * | 2017-05-22 | 2019-04-02 | 哈尔滨工业大学 | A method of by vibrating and settling purification silver nanowires |
| CN107398563A (en) * | 2017-07-25 | 2017-11-28 | 中南大学 | A kind of method of regulation and control nano silver wire length |
| CN107398563B (en) * | 2017-07-25 | 2019-04-30 | 中南大学 | A method of regulation silver nanowires length |
| CN109482900A (en) * | 2018-12-14 | 2019-03-19 | 浙江加州国际纳米技术研究院台州分院 | A kind of method high-volume synthesis and efficiently purify ultra-fine silver nanowires |
| CN110814361A (en) * | 2019-11-08 | 2020-02-21 | 惠州达祺光电科技有限公司 | Silver nanowire purification method |
| CN113084154A (en) * | 2021-03-29 | 2021-07-09 | 重庆烯宇新材料科技有限公司 | Method for efficiently purifying nano silver wires |
| CN113084155A (en) * | 2021-03-30 | 2021-07-09 | 重庆烯宇新材料科技有限公司 | Green, mild and efficient purification method of nano silver wires |
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