Preparation method of silver nanowire or transparent conductive film with high length-diameter ratio
A silver nanowire, high aspect ratio technology, applied in the field of nanomaterials, can solve the problems of uneven length distribution, large diameter, short length of silver nanowires, etc., and achieve the effect of simple method, good effect and excellent performance.
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Embodiment 1
[0035] A method for preparing ultra-long silver nanowires with an average length of up to 200 μm, a maximum length of more than 400 μm, an average diameter of 90 nm, and an aspect ratio of 2200, using 0.000162 g / mL ferric chloride hexahydrate as a nucleation control agent, including the following steps:
[0036] Step 1: Prepare the silver nanowire synthesis solution to be separated and purified
[0037] Weigh 0.22g of silver nitrate and dissolve it in 7ml of ethylene glycol. Be careful to keep stirring at a low speed during the magnetic stirring and dissolving process. If the silver nitrate solution is stirred too fast, it will easily turn red and more nanoparticles will appear in the final product. Take 20ml to configure Put the good 0.01g / mL PVP K90 solution in a 100ml beaker, add 3ml 0.000162g / mL ferric chloride hexahydrate solution and magnetically stir evenly, then add the dissolved silver nitrate solution, stir evenly and pour into the polytetrafluoroethylene liner After...
Embodiment 2
[0046] A method for preparing ultra-long silver nanowires with a length of 150-200 μm, a diameter of 120-200 nm, and an aspect ratio of up to 1700, using 0.001-0.01 mol / L copper chloride dihydrate as a nucleation control agent. The steps are as follows:
[0047] Step 1: Prepare the silver nanowire synthesis solution to be separated and purified
[0048]Weigh 0.22g of silver nitrate and dissolve it in 7ml of ethylene glycol. Be careful to keep stirring at a low speed during the magnetic stirring and dissolving process. If the silver nitrate solution is stirred too fast, it will easily turn red and more nanoparticles will appear in the final product. Take 20ml to configure Put a good 0.01g / mL polyvinylpyrrolidone K90 solution in a 100ml beaker, add 3ml 0.000512g / mL copper chloride dihydrate solution and magnetically stir evenly, then add the dissolved silver nitrate solution, stir evenly and pour into polytetrafluoroethylene Lining, after installing the reactor, put it into a pr...
Embodiment 3
[0057] A preparation method of ultra-fine silver nanowires with a diameter of about 34nm and an aspect ratio as high as 2300-3000, using 0.000162g / mL ferric chloride hexahydrate, 0.010298g / mL sodium bromide, 0.011688g / mL chloride Sodium works together as a nucleation control agent with the following steps:
[0058] Step 1: Measure 20ml of polyvinylpyrrolidone solution into a 100ml beaker, add 0.5ml of NaCl solution, 0.5ml of NaBr solution, and 2mL of ferric chloride solution. Weigh 0.22 grams of silver nitrate and dissolve it in 8ml of ethylene glycol, pour the dissolved silver nitrate solution into a beaker, stir evenly with a magnetic force, pour the stirred mixture into a polytetrafluoroethylene liner, install the reaction kettle and put it Put it in a preheated oven at 130°C for 6 hours.
[0059] Step 2: Pour the earthy brown product after the reaction into acetone to remove small nanoparticles, then centrifuge and wash it with absolute ethanol for 3 to 4 times at a speed...
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