Transparent conductive film comprising water soluble binders
View Patent ↗Transparent conductive films comprising silver nanowires dispersed in polyvinyl alcohol or gelatin can be prepared by coating from aqueous solvent using common aqueous solvent coating techniques. These films have good transparency, conductivity, and stability. Coating on a flexible support allows the manufacture of flexible conductive materials.
1. A transparent conductive article comprising:
a transparent support having coated thereon;
a transparent conductive film comprising a random network of silver nanowires dispersed within a water soluble polymer comprising gelatin and at least one ethyl sulfate based quaternary ammonium compound,
wherein the transparent conductive article exhibits a transmittance of at least 70% across entire spectrum range of from about 350 nm to about 1100 nm and a surface resistivity of 500 ohm/sq or less.
2. The transparent conductive article of claim 1 wherein the transparent support is a flexible transparent polymer film.
3. The transparent conductive article of claim 1 , wherein the transparent support is a polyethylene terephthalate.
4. The transparent conductive article of claim 1 wherein the silver nanowires have an aspect ratio of from about 20 to about 3300.
5. The transparent conductive article of claim 1 wherein the silver nanowires are present in an amount of from about 20 mg/m 2 to about 500 mg/m 2 .
6. The transparent conductive article of claim 1 further comprising up to 50 wt % of one or more additional water soluble polymers.
7. The transparent conductive article of claim 6 wherein one or more of the additional water soluble polymers is a polyacrylic polymer.
8. The transparent conductive article of claim 1 further comprising a vinyl sulfone crosslinking agent.
9. The transparent conductive article of claim 1 further comprising a transparent polymer layer located between the transparent support and the transparent conductive film.
10. The transparent conductive article according to claim 8 , wherein the vinyl sulfone crosslinking agent comprises bis(vinylsulfonyl)methane, bis(vinylsulfonylmethyl)ether, or bis(vinylsulfonylethyl)ether.
11. The transparent conductive article according to claim 8 , wherein the vinyl sulfone crosslinking agent comprises bis(vinylsulfonyl)methane or the compound represented by the following structure: