STABILIZATION AGENTS FOR SILVER NANOWIRE BASED TRANSPARENT CONDUCTIVE FILMS
Certain compounds comprising at least one carboxyl group have been found to provide anti-corrosion properties when incorporated into silver nanowire containing films. Such compounds may be incorporated into one or more silver nanowire containing layers or in one or more layers disposed adjacent to the silver nanowire containing layers.
1 . A transparent conductive article comprising:
a transparent support;
at least one first layer disposed on the transparent support, the at least one first layer comprising a network of silver nanowires dispersed within at least one polymer binder, and at least one first compound comprising at least one carboxyl group.
2 . The transparent conductive article of claim 1 , wherein the said at least one first compound comprises a pKa greater than about 3.0.
3 . The transparent conductive article of claim 1 , wherein the said at least one first compound comprises 2-(4-chlorobenzoyl)benzoic acid.
4 . The transparent conductive article of claim 1 , having a transmittance of at least about 80% across a spectrum range of from about 350 nm to about 1100 nm and a surface resistivity of about 500 ohm/sq or less.
5 . The transparent conductive article of claim 1 , wherein the at least one polymer binder comprises at least one water soluble polymer.
6 . The transparent conductive article of claim 5 , wherein the at least one water soluble polymer comprises gelatin, polyvinyl alcohol, or mixtures thereof.
7 . The transparent conductive article of claim 6 , wherein the at least one polymer binder further comprises up to about 50 wt % of one or more additional water soluble polymers.
8 . The transparent conductive article of claim 7 , wherein one or more of the additional water soluble polymers comprises at least one polyacrylic polymer.
9 . The transparent conductive article of claim 1 , wherein the at least one polymer binder comprises at least one organic solvent soluble polymer.
10 . The transparent conductive article of claim 9 , wherein the organic solvent soluble polymer binder comprises at least one cellulose ester polymer.
11 . The transparent conductive article of claim 10 , wherein the at least one cellulose ester polymer has a glass transition temperature of at least about 100° C.
12 . The transparent conductive article of claim 9 , wherein the organic solvent soluble polymer binder comprises cellulose acetate, cellulose acetate butyrate, or cellulose acetate propionate, or mixtures thereof.
13 . The transparent conductive article of claim 9 , wherein the at least one polymer binder further comprises up to 50 wt % of one or more additional organic solvent soluble polymers.
14 . The transparent conductive article of claim 13 , wherein the one or more of the additional organic solvent soluble polymers comprises at least one polyester polymer.
15 . A method comprising:
applying at least one first coating mixture onto a transparent support to form at least one first coated layer, the at least one first coating mixture comprising silver nanowires, at least one polymer binder, and at least one first compound comprising at least one covalently bound carboxyl group.
16 . The method according to claim 15 , wherein the said at least one first compound comprises a pKa greater than about 3.0.
17 . The method according to claim 15 , wherein the said at least one first compound comprises 2-(4-chlorobenzoyl)benzoic acid.
18 . A transparent conductive article comprising:
a transparent support;
at least one first layer disposed on the transparent support, the at least one first layer comprising a network of silver nanowires dispersed within at least one polymer binder, and;
at least one second layer disposed adjacent to the at least one first layer, the at least one second layer comprising at least one first compound comprising at least one carboxyl group.
19 . The transparent conductive article according to claim 18 , wherein the at least one second layer is disposed on the at least one first layer.
20 . The transparent conductive article according to claim 18 , wherein the at least one second layer is disposed between the transparent support and the at least one first layer.