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A roll-to-roll process method for preparing high-performance nano-silver wire transparent conductive film

A transparent conductive film and nano-silver wire technology, which is applied in the manufacturing of circuits, electrical components, cables/conductors, etc., can solve the problems of being in the primary stage, high cost, and incompatible with the roll-to-roll process, etc., and achieve enhanced stability and electrical conductivity. The effect of sex, simple means and low cost

Active Publication Date: 2018-03-06
SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Although there are already a variety of technical routes in the laboratory that can be used to enhance the conductivity and stability of silver nanowire films, including the introduction of metal oxides, conductive polymers, high pressure, high temperature, laser welding, and the introduction of adhesives, etc., due to cost It is too high or it is difficult to be compatible with the roll-to-roll process, and the industrialization of this series of technologies is still in its infancy; and although there are commercialized nano-silver wire conductive films, its conductivity, light transmittance and In terms of stability, there is still a big gap with the nano-silver wire conductive film developed by the laboratory; Chinese patent CN 205044039 invented a roll-to-roll impregnation system for coating and cleaning flexible transparent conductive films, but did not mention how to improve transparency Conductive film characteristics; Chinese patent CN 104900302 proposes a hot pressing process to inlay nano-silver wires on the surface of transparent polymer film to enhance its conductivity; Chinese patent CN 102522145 proposes to introduce an adhesion-promoting layer to enhance the conductivity of nano-silver wires; but the above The two patents do not mention how to apply these means of enhancing the properties of transparent conductive films to large-area mass production technologies; in short, there is no clear technology or conclusion on how to realize high-performance flexible transparent nano-conductive films in the roll-to-roll process preparation of

Method used

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  • A roll-to-roll process method for preparing high-performance nano-silver wire transparent conductive film
  • A roll-to-roll process method for preparing high-performance nano-silver wire transparent conductive film
  • A roll-to-roll process method for preparing high-performance nano-silver wire transparent conductive film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Embodiment 1: Nano-silver wire coating module (such as image 3 )

[0042]The nano-silver wire solution is prepared. The average diameter of the nano-silver wires used is 34 nm and the length is 18 um. The nano-silver wires are dispersed in the ethanol solution with a concentration of 10 mg / ml. The nano-silver wire dispersion was mixed with anhydrous isopropanol at a mass ratio of 1:4, and was shaken uniformly by ultrasonication for 10 minutes to disperse. The optically transparent film used is polyethylene terephthalate (PET), which is transferred to the coating module through the unwinding roller and the tension roller; The toluene solution of APTES (5wt%, ultrasonic treatment for 10min) passed the PET film through the impregnation module at an unwinding speed of 1 m / min and a tension of 50N, and the pure water contact angle of the obtained PET film changed from 70° to 40°; After the baking treatment at 100 degrees Celsius (about 15 minutes), UVO treatment for about...

Embodiment 21

[0043] Example 2.1: Composite modules (eg Figure 4 )

[0044] The composite module includes a surface treatment module, a doctor blade coating module and a curing module; a 3 wt% aminomethyltrimethylsilane solution is configured in a petri dish and placed in a closed chemical reaction furnace with the temperature set at 70°C; The film obtained after coating nano-silver wires is subjected to a chemical reaction furnace to complete the surface treatment process, and a hydrophobic layer is deposited on the surface of the film to enhance the hydrophobicity of the substrate; the treated film is sent to the doctor blade coating module. The curing glue is epoxy resin. By controlling the distance between the scraper and the substrate, the thickness of the coated epoxy resin is about 500 um; the epoxy resin is fully cured by heating, the curing time is 20 s, and the curing temperature is 80°C; The epoxy resin-silver nanowire-PET composite film structure embedded with silver nanowires...

Embodiment 22

[0045] Embodiment 2.2: Composite module and composite film performance test (such as Figure 5 )

[0046] Configure a cyclohexane solution of 2wt% octadecyltrichlorosilane, shake it up to make the solution uniformly dispersed and add it to the dipping tank; the PET-nano silver wire film obtained in Example 1 is passed through the dipping module to make the PET A hydrophobic layer is deposited on the surface, and the hydrophobicity is enhanced. Apply NOA UV-curable adhesive on the target substrate PET by doctor blade coating, and the film thickness is controlled at about 500um. The surface-treated PET-nanometer silver wire film and PET-NOA were pressed together by a pressure roller and then cured by ultraviolet light. The curing wavelength was set to 365 nm, the curing optical power density was 15 mW / min, and the curing time was 5 min. After curing, a composite film structure of PET-NOA-nanowire-PET is formed (such as Figure 8 shown); after stripping and winding, the multip...

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Abstract

The invention discloses a roll-to-roll process method for preparing a high-performance nanometer silver wire transparent conductive thin film. The roll-to-roll process method sequentially involves an unwinding module, a coating module, a composite module and a winding module, wherein the coating module sequentially comprises a surface processing module, a coating device and a conductivity enhancement module, and the composite module sequentially comprises a curing adhesive composite module, a curing module and a stripping module. The invention provides a roll-to-roll process for preparing the high-performance nanometer silver wire conductive thin film, the means is simple, the cost is low, and large-area production of the high-performance flexible transparent conductive thin film can be achieved.

Description

technical field [0001] The invention relates to the field of transparent conduction, and more specifically, relates to a roll-to-roll process method for preparing a high-performance nano-silver wire transparent conduction film. Background technique [0002] Transparent conductive film is a basic optoelectronic material with both high conductivity and high transparency in the visible light band. It is widely used in optoelectronic display fields such as displays, light-emitting devices, solar cells, sensors, and flexible touch screens, and has broad commercial application prospects. The traditional transparent conductive film is based on indium tin oxide material. Although the display optoelectronic manufacturing technology based on this material is quite mature, the cost is relatively high because indium tin oxide contains rare materials; and the flexibility of indium tin oxide film is very poor. , cannot be used to prepare flexible displays, and is greatly limited in applic...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01B13/00
CPCH01B13/0036
Inventor 杨柏儒刘贵师许钰旺陈鹏谢汉萍
Owner SUN YAT SEN UNIV
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