CN109434132A - A method of purifying ultra-fine silver nanowires - Google Patents
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Abstract
The present invention provides a kind of method for purifying ultra-fine silver nanowires, comprising the following steps: step 1, prepares unpurified ultra-fine silver nanowires；Step 2, the unpurified ultra-fine silver nanowires for taking step 1 to prepare after being washed with solvent, then with solvent dissolves unpurified ultra-fine silver nanowires, then instills ammonium hydroxide, stand, and removes bottom precipitation to get to the ultra-fine silver nanowire solution of purifying.Ammonium hydroxide is added in unpurified ultra-fine silver nanowire solution in the present invention, the silver nano-grain Ostwald ripening in unpurified ultra-fine silver nanowire solution is assisted by ammonium hydroxide, induction silver nano-grain is grown up, then it only needs to pass through standing, the purification process complicated without other, the silver nano-grain grown up can be made to separate during standing with silver nanowires, obtain mass percent 60%-85% diameter 20nm-30nm ultra-fine silver nanowires.
Description
Technical field
The invention belongs to nano-material technical fields, are related to a kind of method for purifying ultra-fine silver nanowires.
Background technique
Silver is the metal material that electric conductivity is best in nature.Silver nanowires has both excellent electric conductivity and ductility, by
Its thin-film material constituted shows the performance better than tin indium oxide (ITO) transparent conductive film, it is following it is flexible, bent,
Stretchable electronics field will play key effect.In particular with Internet of Things demand of the development to flexible display screen increasingly
Increase, silver nanowires transparent conductive film has become the new material for replacing transparent conductive film material.Silver nanowires is transparent
Conductive film performance is improved as the diameter of nano wire reduces.Wherein, mist degree is a crucial performance indicator, is directly determined
The clarity of display screen.For the mist degree less than 1%, the diameter of silver nanowires must not exceed 40nm.In recent years,
Through there is the preparation method of ultra-fine silver nanowires that document report average diameter is about 20nm, but these methods can all lead to institute
Contain a large amount of silver nano-grain in the silver nanowires product of preparation, the mass fraction of final ultra-fine silver nanowires is only 50% left side
It is right.Silver nano-grain will increase the scattering of light, so using bright the leading of the ultra-fine silver nanowires preparation containing a large amount of nano particles
The mist degree of conductive film is very big, is unable to satisfy requirement of the display screen to transparent conductive film.Therefore, it is necessary to will be surpassed by purification technique
Thin silver nanowires is separated from prepared product.But the purification technique reported in document and patent at present or it is related to
Perhaps process is complicated or purification effect is bad for toxic chemical substance.Therefore, there is an urgent need to develop the ultra-fine silver nanowires of purifying
New technology.
Summary of the invention
Aiming at the problems existing in the prior art, the present invention provides a kind of method for purifying ultra-fine silver nanowires, this method
The purification devices of toxic chemical and complexity it are not related to, it is only necessary to silver nano-grain can be made to receive with ultra-fine silver by standing
Rice noodles efficiently separate.
The present invention is to be achieved through the following technical solutions:
A method of purifying ultra-fine silver nanowires, comprising the following steps:
Step 1, unpurified ultra-fine silver nanowires is prepared；
Step 2, the unpurified ultra-fine silver nanowires for taking step 1 to prepare, after being washed with solvent, then it is impure with solvent dissolution
The ultra-fine silver nanowires changed, then instills ammonium hydroxide, stands, and removes bottom precipitation to get the ultra-fine silver nanowire solution of purifying is arrived.
Preferably, in step 2, dissolving unpurified ultra-fine silver nanowires with solvent makes its concentration 0.1-10mg/mL, drips
Entering ammonium hydroxide to ammonia concn is 0.01mM-10mM.
Preferably, in step 2, solvent is water or PVP aqueous solution.
Preferably, in step 2, time of repose 0.5h-24h.
Preferably, step 1, unpurified ultra-fine silver nanowires, concrete operations are prepared are as follows:
Step 1.1, the ethylene glycol solution of the ethylene glycol solution of sodium bromide, the ethylene glycol solution of sodium chloride, PVP are prepared respectively
With the ethylene glycol solution of silver nitrate；
Step 1.2, ethylene glycol is taken, ethylene glycol solution, the ethylene glycol of sodium chloride that the sodium bromide that step 1.1 is prepared is added are molten
The ethylene glycol solution of liquid, the ethylene glycol solution of PVP and silver nitrate increases temperature nucleation, reduces temperature growth, obtain unpurified
Ultra-fine silver nanowires.
Further, in step 1.1, the preparation of the ethylene glycol solution of sodium bromide: taking sodium bromide to be added in ethylene glycol, in
It is dissolved at 100 DEG C -150 DEG C complete；The preparation of the ethylene glycol solution of sodium chloride: take sodium chloride be added ethylene glycol in, in 100 DEG C-
It is dissolved at 150 DEG C complete；The preparation of the ethylene glycol solution of PVP: it takes PVP to be added in ethylene glycol, has been dissolved at 100 DEG C -150 DEG C
Entirely；The preparation of the ethylene glycol solution of silver nitrate: taking silver nitrate to be added in ethylene glycol, dissolves at 0 DEG C -10 DEG C complete.
Further, the preparation of the ethylene glycol solution of the ethylene glycol solution of sodium bromide, the ethylene glycol solution of sodium chloride and PVP
When, dissolution time is 1min-180min；When the ethylene glycol solution of silver nitrate is prepared, dissolution time 5s-500s.
Further, in step 1.2, silver nitrate, sodium bromide, sodium chloride and PVP molar ratio be (10-50): 1:(1-
5):(10-50)。
Further, in step 1.2, increase temperature nucleation, reduce temperature growth, specifically: increase the temperature to 175 DEG C-
190 DEG C, 150 DEG C -170 DEG C are cooled the temperature to after temperature is stablized, 30min-180min is kept the temperature, obtains unpurified ultra-fine silver and receive
Rice noodles.
Compared with prior art, the invention has the following beneficial technical effects:
Ammonium hydroxide is added in unpurified ultra-fine silver nanowire solution in the present invention, assists unpurified ultra-fine silver by ammonium hydroxide
Silver nano-grain Ostwald ripening in nanowire solution, induction silver nano-grain are grown up, are then only needed by quiet
It sets, the purification process complicated without other can be such that the silver nano-grain grown up separates during standing with silver nanowires, obtain
Mass percent is obtained in the diameter of 60%-85% in the ultra-fine silver nanowires of 20nm-30nm, can satisfy display screen to low haze
Demand.And the method for the present invention is simple and easy, at low cost, can produce in batches.It there is no in document and patent at present and pass through ammonium hydroxide
The Ostwald ripening and sedimentation method of auxiliary purify the report of ultra-fine silver nanowires.
Detailed description of the invention
Fig. 1 is that the SEM of the unpurified silver nanowires of comparative example 1 schemes.
Fig. 2 is the SEM figure for the silver nanowires that embodiment 1 purifies.
Fig. 3 is the SEM figure for the silver nanowires that embodiment 2 purifies.
Fig. 4 is the SEM figure for the silver nanowires that embodiment 3 purifies.
Fig. 5 is the SEM figure for the silver nanowires that embodiment 4 purifies.
Specific embodiment
Below with reference to specific embodiment, the present invention is described in further detail, it is described be explanation of the invention and
It is not to limit.
The method of the ultra-fine silver nanowires of purifying of the present invention, the Ostwald ripening assisted by ammonium hydroxide and sedimentation
Method, induction silver nano-grain are grown up and are separated from nanowire solution, after standing 0.5h-24h, can be obtained Nanowire Quality
The ultra-fine silver nanowires that the diameter that percentage is 60%-85% is 20nm-30nm.
Specifically includes the following steps:
(1) preparation of unpurified ultra-fine silver nanowires:
(i) preparation of the ethylene glycol solution of sodium bromide: weighing a certain amount of sodium bromide and be dissolved in ethylene glycol, in 100 DEG C-
Stirring and dissolving 1min-180min, concentration 1mM-1000mM are carried out in 150 DEG C of heating plate；
(ii) it the preparation of the ethylene glycol solution of sodium chloride: weighs a certain amount of sodium chloride and is dissolved in ethylene glycol, in 100
Stirring and dissolving 1min-180min, concentration 1mM-1000mM are carried out in DEG C -150 DEG C of heating plate；
(iii) it the preparation of the ethylene glycol solution of PVP: weighs a certain amount of PVP and is dissolved in ethylene glycol, in 100 DEG C -150
DEG C heating plate on carry out stirring and dissolving 1min-180min, concentration 0.01mM-10mM；
(iv) preparation of the ethylene glycol solution of silver nitrate: weighing a certain amount of silver nitrate and be dissolved in ethylene glycol, Yu Chaosheng
It in temperature is ultrasound 5s-500s in 0 DEG C -10 DEG C of ice-water bath in instrument, up to being completely dissolved, concentration 1mM-1000mM；
(v) preparation of ultra-fine silver nanowires: taking a certain amount of ethylene glycol to pour into round-bottomed flask, and step (1)-is added immediately
(4) solution made from makes the molar ratio (10-50) of silver nitrate, sodium bromide, sodium chloride and PVP: 1:(1-5): (10-50) rises
High-temperature cools the temperature to 150 DEG C -170 DEG C after temperature is stablized, keeps the temperature 30min-180min, can obtain to 175 DEG C -190 DEG C
The unpurified ultra-fine silver nanowires for being 20nm-30nm to diameter.
(2) purifying of ultra-fine silver nanowires:
Unpurified ultra-fine silver nanowire solution 1mL-20mL is taken, solvent is added and dilutes 5 times -100 times, and is centrifuged removal second
Two pure and mild PVP, the concentration that unpurified ultra-fine silver nanowires is diluted to solvent is 0.1-10mg/mL, then instills ammonium hydroxide extremely
Ammonia concn is 0.01mM-10mM, and 0.5h-24h is stood in container, removes bottom precipitation, obtains the matter of ultra-fine silver nanowires
Amount percentage can achieve 60%-85%；Solvent is PVP aqueous solution or water.
Embodiment 1:
(1) it the preparation of the ethylene glycol solution of sodium bromide: weighs 0.4572g sodium bromide and is dissolved in 20mL ethylene glycol, in 130
DEG C heating plate on carry out stirring and dissolving 2h；
(2) it the preparation of the ethylene glycol solution of sodium chloride: weighs 0.2466g sodium chloride and is dissolved in 20mL ethylene glycol, in 130
DEG C heating plate on carry out stirring and dissolving 2h；
(3) preparation of the ethylene glycol solution of PVP: the PVP that 1.68g molecular weight is 360,000 is weighed, 30mL second two is dissolved in
In alcohol, in progress stirring and dissolving 5min in 130 DEG C of heating plate；
(4) preparation of the ethylene glycol solution of silver nitrate: weighing 0.6765g silver nitrate, is dissolved in 15mL ethylene glycol, in
It in temperature is ultrasound 5min in 5 DEG C of ice-water bath in Ultrasound Instrument；
(5) preparation of unpurified ultra-fine silver nanowires: taking 116mL ethylene glycol to pour into the round-bottomed flask of 250mL capacity,
Solution made from step (1)-(4) is added immediately, makes the molar ratio 10:1:1:10 of silver nitrate, sodium bromide, sodium chloride and PVP,
180 DEG C are increased the temperature to, is cooled the temperature to after temperature is stablized in 170 DEG C, keeps the temperature 60min, obtaining diameter is the impure of 25nm
The ultra-fine silver nanowires changed.
(6) silver nanowires solution 10mL is taken, deionized water 90mL is added, and is centrifuged removal ethylene glycol and PVP, uses deionization
Water is diluted to 1mg/mL, then instills ammonium hydroxide to 0.1mM, 3h is stood in container, the mass percent of ultra-fine silver nanowires can
To reach 65%.
Embodiment 2:
On the basis of embodiment 1, step (6) need to be only changed to take silver nanowires solution 10mL, deionized water is added
90mL, and it is centrifuged removal ethylene glycol and PVP, it is diluted to 1mg/mL with deionized water, then instills ammonium hydroxide to 0.1mM, in container
Middle standing 9h, the mass percent of ultra-fine silver nanowires can achieve 72%.
Embodiment 3:
On the basis of embodiment 1, step (6) need to be only changed to take silver nanowires solution 10mL, deionized water is added
90mL, and it is centrifuged removal ethylene glycol and PVP, it is diluted to 1mg/mL with deionized water, then instills ammonium hydroxide to 0.1mM, in container
Middle standing 15h, the mass percent of ultra-fine silver nanowires can achieve 81%.
Embodiment 4:
On the basis of embodiment 1, step (6) need to be only changed to take silver nanowires solution 10mL, deionized water is added
90mL, and it is centrifuged removal ethylene glycol and PVP, it is diluted to 1mg/mL with ethyl alcohol, then instillation ammonium hydroxide is quiet in container to 0.1mM
12h is set, the mass percent of ultra-fine silver nanowires can achieve 76%.
Embodiment 5:
(1) it the preparation of the ethylene glycol solution of sodium bromide: weighs 0.4572g sodium bromide and is dissolved in 20mL ethylene glycol, in 100
DEG C heating plate on carry out stirring and dissolving 3h；
(2) it the preparation of the ethylene glycol solution of sodium chloride: weighs 0.2466g sodium chloride and is dissolved in 20mL ethylene glycol, in 100
DEG C heating plate on carry out stirring and dissolving 3h；
(3) preparation of the ethylene glycol solution of PVP: the PVP that 1.68g molecular weight is 360,000 is weighed, 30mL second two is dissolved in
In alcohol, in progress stirring and dissolving 3h in 100 DEG C of heating plate；
(4) preparation of the ethylene glycol solution of silver nitrate: weighing 0.6765g silver nitrate, is dissolved in 15mL ethylene glycol, in
It in temperature is ultrasound 8.5min in 0 DEG C of ice-water bath in Ultrasound Instrument；
(5) preparation of unpurified ultra-fine silver nanowires: taking 116mL ethylene glycol to pour into the round-bottomed flask of 250mL capacity,
Solution made from step (1)-(4) is added immediately, makes the molar ratio 20:1:2:20 of silver nitrate, sodium bromide, sodium chloride and PVP,
175 DEG C are increased the temperature to, is cooled the temperature to after temperature is stablized in 150 DEG C, is kept the temperature 30min, obtain unpurified ultra-fine silver and receive
Rice noodles.
(6) silver nanowires solution 10mL is taken, PVP aqueous solution 90mL, and centrifuge washing is added, then product is water-soluble with PVP
Liquid is diluted to 0.1mg/mL, then instills ammonium hydroxide to 0.01mM, 3h is stood in container, the ultra-fine silver nanowires purified.
Embodiment 6:
(1) it the preparation of the ethylene glycol solution of sodium bromide: weighs 0.4572g sodium bromide and is dissolved in 20mL ethylene glycol, in 110
DEG C heating plate on carry out stirring and dissolving 2.5h；
(2) it the preparation of the ethylene glycol solution of sodium chloride: weighs 0.2466g sodium chloride and is dissolved in 20mL ethylene glycol, in 110
DEG C heating plate on carry out stirring and dissolving 2.5h；
(3) preparation of the ethylene glycol solution of PVP: the PVP that 1.68g molecular weight is 360,000 is weighed, 30mL second two is dissolved in
In alcohol, in progress stirring and dissolving 2.5h in 110 DEG C of heating plate；
(4) preparation of the ethylene glycol solution of silver nitrate: weighing 0.6765g silver nitrate, is dissolved in 15mL ethylene glycol, in
It in temperature is ultrasound 4min in 2 DEG C of ice-water bath in Ultrasound Instrument；
(5) preparation of unpurified ultra-fine silver nanowires: taking 116mL ethylene glycol to pour into the round-bottomed flask of 250mL capacity,
Solution made from step (1)-(4) is added immediately, makes the molar ratio 25:1:3:30 of silver nitrate, sodium bromide, sodium chloride and PVP,
185 DEG C are increased the temperature to, is cooled the temperature to after temperature is stablized in 155 DEG C, is kept the temperature 90min, obtain unpurified ultra-fine silver and receive
Rice noodles.
(6) silver nanowires solution 10mL is taken, deionized water 90mL is added, and is centrifuged removal ethylene glycol and PVP, uses deionization
Water is diluted to 5mg/mL, then instills ammonium hydroxide to 2mM, 3h is stood in container, the ultra-fine silver nanowires purified.
Embodiment 7:
(1) it the preparation of the ethylene glycol solution of sodium bromide: weighs 0.4572g sodium bromide and is dissolved in 20mL ethylene glycol, in 120
DEG C heating plate on carry out stirring and dissolving 1h；
(2) it the preparation of the ethylene glycol solution of sodium chloride: weighs 0.2466g sodium chloride and is dissolved in 20mL ethylene glycol, in 120
DEG C heating plate on carry out stirring and dissolving 1h；
(3) preparation of the ethylene glycol solution of PVP: the PVP that 1.68g molecular weight is 360,000 is weighed, 30mL second two is dissolved in
In alcohol, in progress stirring and dissolving 1h in 120 DEG C of heating plate；
(4) preparation of the ethylene glycol solution of silver nitrate: weighing 0.6765g silver nitrate, is dissolved in 15mL ethylene glycol, in
It in temperature is ultrasound 2min in 7 DEG C of ice-water bath in Ultrasound Instrument；
(5) preparation of unpurified ultra-fine silver nanowires: taking 116mL ethylene glycol to pour into the round-bottomed flask of 250mL capacity,
Solution made from step (1)-(4) is added immediately, makes the molar ratio 40:1:3:40 of silver nitrate, sodium bromide, sodium chloride and PVP,
190 DEG C are increased the temperature to, is cooled the temperature to after temperature is stablized in 160 DEG C, is kept the temperature 120min, obtain unpurified ultra-fine silver and receive
Rice noodles.
(6) silver nanowires solution 10mL is taken, PVP aqueous solution 90mL is added, and centrifuge washing, product are dilute with PVP aqueous solution
It releases to 8mg/mL, then instills ammonium hydroxide to 5mM, 3h is stood in container, the ultra-fine silver nanowires purified.
Embodiment 8:
(1) it the preparation of the ethylene glycol solution of sodium bromide: weighs 0.4572g sodium bromide and is dissolved in 20mL ethylene glycol, in 150
DEG C heating plate on carry out stirring and dissolving 1min；
(2) it the preparation of the ethylene glycol solution of sodium chloride: weighs 0.2466g sodium chloride and is dissolved in 20mL ethylene glycol, in 150
DEG C heating plate on carry out stirring and dissolving 1min；
(3) preparation of the ethylene glycol solution of PVP: the PVP that 1.68g molecular weight is 360,000 is weighed, 30mL second two is dissolved in
In alcohol, in progress stirring and dissolving 1min in 150 DEG C of heating plate；
(4) preparation of the ethylene glycol solution of silver nitrate: weighing 0.6765g silver nitrate, is dissolved in 15mL ethylene glycol, in
It in temperature is ultrasound 5s in 10 DEG C of ice-water bath in Ultrasound Instrument；
(5) preparation of unpurified ultra-fine silver nanowires: taking 116mL ethylene glycol to pour into the round-bottomed flask of 250mL capacity,
Solution made from step (1)-(4) is added immediately, makes the molar ratio 50:1:5:50 of silver nitrate, sodium bromide, sodium chloride and PVP,
180 DEG C are increased the temperature to, is cooled the temperature to after temperature is stablized in 165 DEG C, is kept the temperature 180min, obtain unpurified ultra-fine silver and receive
Rice noodles.
(6) silver nanowires solution 10mL is taken, deionized water 90mL is added, and is centrifuged removal ethylene glycol and PVP, uses deionization
Water is diluted to 10mg/mL, then instills ammonium hydroxide to 10mM, 3h is stood in container, the ultra-fine silver nanowires purified.
Comparative example 1:
(1) it the preparation of the ethylene glycol solution of sodium bromide: weighs 0.4572g sodium bromide and is dissolved in 20mL ethylene glycol, in 130
DEG C heating plate on carry out stirring and dissolving 2h；
(2) it the preparation of the ethylene glycol solution of sodium chloride: weighs 0.2466g sodium chloride and is dissolved in 20mL ethylene glycol, in 130
DEG C heating plate on carry out stirring and dissolving 2h；
(3) preparation of the ethylene glycol solution of PVP: the PVP that 1.68g molecular weight is 360,000 is weighed, 30mL second two is dissolved in
In alcohol, in progress stirring and dissolving 5min in 130 DEG C of heating plate；
(4) preparation of the ethylene glycol solution of silver nitrate: weighing 0.6765g silver nitrate, is dissolved in 15mL ethylene glycol, in
It in temperature is ultrasound 5min in 5 DEG C of ice-water bath in Ultrasound Instrument；
(5) preparation of unpurified ultra-fine silver nanowires: taking 116mL ethylene glycol to pour into the round-bottomed flask of 250mL capacity,
Solution made from step (1)-(4) is added immediately, makes the molar ratio 10:1:1:10 of silver nitrate, sodium bromide, sodium chloride and PVP,
180 DEG C are increased the temperature to, is cooled the temperature to after temperature is stablized in 170 DEG C, keeps the temperature 60min, obtaining diameter is the impure of 25nm
The ultra-fine silver nanowires changed.
Mass fraction < 60%, SEM of ultra-fine silver nanowires in unpurified ultra-fine silver nanowires prepared by comparative example 1
Figure is as shown in Figure 1, it can be seen that silver nano-grain is relatively more, and the purity of ultra-fine silver nanowires is relatively low.
The mass fraction of ultra-fine silver nanowires is 65%, SEM figure in the ultra-fine silver nanowires of purifying prepared by embodiment 1
As shown in Fig. 2, compared with the not purified ultra-fine silver nanowires of comparative example 1, it can be seen that silver nano-grain significantly reduces, ultra-fine
The purity of silver nanowires has significant improvement.
The mass fraction of the ultra-fine silver nanowires of purifying prepared by embodiment 2, embodiment 3 and embodiment 4 is to be respectively
72%, 81% and 76%, SEM figure are respectively as shown in Fig. 3,4,5, it can be seen that the wherein purity and Fig. 1 of ultra-fine silver nanowires
It compares, all has significant improvement, it is seen then that after AMMONIA TREATMENT, the purity of ultra-fine silver nanowires can be significantly improved.
Claims (9)
1. a kind of method for purifying ultra-fine silver nanowires, which comprises the following steps:
Step 1, unpurified ultra-fine silver nanowires is prepared；
Step 2, the unpurified ultra-fine silver nanowires for taking step 1 to prepare, after being washed with solvent, then it is unpurified with solvent dissolution
Then ultra-fine silver nanowires instills ammonium hydroxide, stand, and removes bottom precipitation to get the ultra-fine silver nanowire solution of purifying is arrived.
2. the method for the ultra-fine silver nanowires of purifying according to claim 1, which is characterized in that in step 2, dissolved with solvent
Unpurified ultra-fine silver nanowires makes its concentration 0.1-10mg/mL, and instilling ammonium hydroxide to ammonia concn is 0.01mM-10mM.
3. the method for the ultra-fine silver nanowires of purifying according to claim 1, which is characterized in that in step 2, solvent be water or
PVP aqueous solution.
4. according to the method for the ultra-fine silver nanowires of purifying described in claim 1, which is characterized in that in step 2, time of repose is
0.5h-24h。
5. the method for the ultra-fine silver nanowires of purifying according to claim 1, which is characterized in that step 1, prepare unpurified
Ultra-fine silver nanowires, concrete operations are as follows:
Step 1.1, the ethylene glycol solution and nitre of the ethylene glycol solution of sodium bromide, the ethylene glycol solution of sodium chloride, PVP are prepared respectively
The ethylene glycol solution of sour silver；
Step 1.2, take ethylene glycol, be added the ethylene glycol solution for the sodium bromide that step 1.1 is prepared, the ethylene glycol solution of sodium chloride,
The ethylene glycol solution of PVP and the ethylene glycol solution of silver nitrate increase temperature nucleation, reduce temperature growth, obtain unpurified super
Thin silver nanowires.
6. the method for the ultra-fine silver nanowires of purifying according to claim 5, which is characterized in that in step 1.1, sodium bromide
The preparation of ethylene glycol solution: taking sodium bromide to be added in ethylene glycol, dissolves at 100 DEG C -150 DEG C complete；The ethylene glycol of sodium chloride
The preparation of solution: taking sodium chloride to be added in ethylene glycol, dissolves at 100 DEG C -150 DEG C complete；The ethylene glycol solution of PVP is matched
System: taking PVP to be added in ethylene glycol, dissolves at 100 DEG C -150 DEG C complete；The preparation of the ethylene glycol solution of silver nitrate: nitric acid is taken
Silver is added in ethylene glycol, dissolves at 0 DEG C -10 DEG C complete.
7. the method for the ultra-fine silver nanowires of purifying according to claim 6, which is characterized in that the ethylene glycol of sodium bromide is molten
When the preparation of the ethylene glycol solution of liquid, the ethylene glycol solution of sodium chloride and PVP, dissolution time is 1min-180min；Silver nitrate
Ethylene glycol solution prepare when, dissolution time 5s-500s.
8. the method for the ultra-fine silver nanowires of purifying according to claim 5, which is characterized in that in step 1.2, silver nitrate,
The molar ratio of sodium bromide, sodium chloride and PVP is (10-50): 1:(1-5): (10-50).
9. the method for the ultra-fine silver nanowires of purifying according to claim 5, which is characterized in that in step 1.2, increase temperature
Nucleation, reduce temperature growth, specifically: increase the temperature to 175 DEG C -190 DEG C, after temperature stablize after cool the temperature to 150 DEG C -
170 DEG C, 30min-180min is kept the temperature, unpurified ultra-fine silver nanowires is obtained.
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| CN112127147A (en) * | 2020-07-24 | 2020-12-25 | 浙江工业大学 | Multifunctional conductive yarn, preparation thereof and application thereof in flexible wearable electronic fabric |
| CN112537773A (en) * | 2019-09-20 | 2021-03-23 | 浙江工业大学 | Method for vertically growing MXene on conductive substrate |
| 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 |
| CN113787188A (en) * | 2021-09-07 | 2021-12-14 | 苏州诺菲纳米科技有限公司 | Method for purifying silver nanowires by inorganic salting-out |
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| CN112127147A (en) * | 2020-07-24 | 2020-12-25 | 浙江工业大学 | Multifunctional conductive yarn, preparation thereof and application thereof in flexible wearable electronic fabric |
| CN112127147B (en) * | 2020-07-24 | 2022-10-11 | 浙江工业大学 | Multifunctional conductive yarn, preparation thereof and application thereof in flexible wearable electronic fabric |
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