A preparation method of graphene/ultra-long silver nanowire flexible transparent conductive film
A technology of transparent conductive films and silver nanowires, which is applied to equipment for manufacturing conductive/semiconductive layers, cable/conductor manufacturing, circuits, etc., and can solve problems such as inability to perform suction filtration and inability to form mixed solutions
Inactive Publication Date: 2019-04-30
BEIJING UNIV OF TECH
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Problems solved by technology
[0009] The key of the present invention is: the ethanol solution of ultra-long silver nanowires and the aqueous solution of graphene oxide cannot form a stable mixed solution. When mixing, the interaction between silver nanowires and graphene oxide will produce a strong aggregation tendency. Agglomerates into flocs, so suction filtration is impossible
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[0031] Example 1. The raw materials used to prepare silver nanowires are ethylene glycol, polyvinylpyrrolidone, silver nitrate, and ferric chloride. Add 0.98g polyvinylpyrrolidone, 1.1g silver nitrate, and 17g, 0.6mM ferric chloride ethylene glycol solution to 125ml ethylene glycol, heat at 160°C for 60min, centrifuge and wash with acetone and ethanol, and store in ethylene glycol. Alcohol solution for use, the concentration is 50mg / L.
[0032] The raw materials used for preparing graphene oxide are graphite powder, concentrated sulfuric acid, potassium permanganate, sodium nitrate, hydrogen peroxide, hydrazine hydrate, and absolute ethanol. Add 2g of graphite powder and 1g of sodium nitrate in sequence to 50mL of concentrated sulfuric acid; after stirring for 30 minutes, heat the mixture to 20°C, and slowly add 6g of KMnO 4 ; Slowly add 60mL of deionized water to the above reaction solution; heat the mixture to 98°C; slowly add 20mL of hydrogen peroxide to the above mixture ...
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Abstract
The invention relates to a preparation method of a graphene / super-long silver nano wire flexible transparent conductive film. The preparation technology of the preparation method of a graphene / super-long silver nano wire flexible transparent conductive film is a vacuum pumping filtration method. The preparation method of a graphene / super-long silver nano wire flexible transparent conductive film includes the steps: preparing silver nano wires with high draw ratio and oxidized graphene with high quality; mixing the super-long silver nano wires and the oxidized graphene to form stable mixed liquor; and finally performing vacuum pumping filtration. The preparation method of a graphene / super-long silver nano wire flexible transparent conductive film has the advantages that the prepared graphene / super-long silver nano wire flexible transparent conductive film has high performance; the preparation method is simple, is quick in preparation and is low in cost; the used equipment is simple and easy to maintain. The preparation method of a graphene / super-long silver nano wire flexible transparent conductive film has great significance on industrial production of the flexible transparent conductive films in future.
Description
technical field [0001] The invention relates to a preparation method for stable existence of graphene oxide and superlong silver nanowires in a solution and a flexible transparent conductive film prepared based on the method. Background technique [0002] Nanowires are typical one-dimensional structures, and solid structures with diameters ranging from tens of nanometers to hundreds of nanometers are generally considered to be nanowires. Among them, silver nanowires exhibit size effect, quantum effect, specific surface effect, etc., as well as the high conductivity of bulk silver, which has attracted the attention of researchers. With the development of portable and miniaturized electronic products, transparent conductive film, a flexible substrate material, is developing rapidly, and there is a tendency to gradually replace the traditional conductive film glass indium tin oxide (ITO), which can be widely used in liquid crystal displays (LCDs), solar cells , microelectronic...
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IPC IPC(8): H01B13/00
CPCH01B13/0026
Inventor 刘丹敏张博梁允田张丹丹田楠张永哲
Owner BEIJING UNIV OF TECH