ANTICORROSION AGENTS FOR TRANSPARENT CONDUCTIVE FILM
Certain organic acids have been found to provide anti-corrosion properties when incorporated into silver nanowire containing films. The effectiveness of such compounds may be enhanced by their introduction into a layer disposed adjacent to a silver nanowire containing layer.
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 second layer disposed adjacent to at least one first layer, the at least one second layer comprising at least one organic acid comprising a pKa between about −3.5 and about 3.0.
2 . The transparent conductive article according to claim 1 , wherein the at least one second layer is disposed on the at least one first layer.
3 . The transparent conductive article according to claim 1 , wherein the at least one second layer is disposed between the transparent support and the at least one first layer.
4 . The transparent conductive article according to claim 1 , wherein the at least one organic acid comprises a pKa between 1.85 and about 3.00.
5 . The transparent conductive article according to claim 1 , wherein the said at least one organic acid comprises at least one of: maleic acid, tetrachlorophthalic acid, trichloroacetic acid, phenylphosphonic acid, phthalic acid, p-toluenesulfonic acid.
6 . The transparent conductive article according to claim 1 , wherein the at least one organic acid comprises at least one of: para-toluene sulfonic acid, phenylphosphonic acid or phthalic acid.
7 . The transparent conductive article according to claim 1 , wherein the at least one organic acid comprises at least one of: maleic acid or para-toluene sulfonic.
8 . The transparent conductive article of embodiment 1, having a transmittance of at least about 80% across entire spectrum range of from about 350 nm to about 1100 nm and a surface resistivity of 500 ohm/sq or less.
9 . The transparent conductive article of embodiment 14, wherein the at least one polymer binder comprises gelatin, polyvinyl alcohol, or mixtures thereof.
10 . The transparent conductive article according to claim 1 , wherein the at least one polymer binder comprises cellulose acetate, cellulose acetate butyrate, or cellulose acetate propionate, or mixtures thereof.
11 . 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 and at least one polymer binder; and
applying at least one second coating mixture onto the at least one first coated layer to form at least one second coated layer, the at least one second coating mixture comprising one or more organic acids comprising a pKa between about −3.5 and 3.0.
12 . The method according to claim 11 , wherein the at least organic acid comprises a pKa between 1.85 and about 3.00.
13 . The method according to claim 11 , wherein the at least one organic acid comprises at least one of: maleic acid, tetrachlorophthalic acid, trichloroacetic acid, phenylphosphonic acid, phthalic acid, p-toluenesulfonic acid.
14 . 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 second coating mixture comprising one or more organic acids comprising a pKa between about −3.5 and 3.0; and
applying at least one second coating mixture onto the at least one first coated layer to form at least one second coated layer, the at least one first coating mixture comprising silver nanowires and at least one polymer binder.
15 . The method according to claim 14 , wherein the at least organic acid comprises a pKa between 1.85 and about 3.00.
16 . The method according to claim 14 , wherein the at least one organic acid comprises at least one of: maleic acid, tetrachlorophthalic acid, trichloroacetic acid, phenylphosphonic acid, phthalic acid, p-toluenesulfonic acid.