Electrically conductive polymer compositions and films made therefrom
View Patent ↗The present invention relates to electrically conductive polymer compositions, and their use in electronic devices. The compositions are an aqueous dispersion including: (i) at least one electrically conductive polymer doped with a non-fluorinated polymeric acid; (ii) at least one highly-fluorinated acid polymer; (iii) at least one water-compatible high-boiling organic solvent; and (iv) electrically insulative inorganic oxide nanoparticles.
1. An aqueous dispersion comprising:
(i) at least one electrically conductive polymer doped with a non-fluorinated polymeric acid;
(ii) at least one highly-fluorinated acid polymer;
(iii) at least one water-compatible high-boiling organic solvent, and
(iv) electrically insulative inorganic oxide nanoparticles,
wherein the acid equivalent ratio of the highly-fluorinated acid polymer to the non-fluorinated polymeric acid is no greater than 1.
2. The dispersion of claim 1 , wherein the electrically conductive polymer is selected from the group consisting of polythiophenes, poly(selenophenes), poly(tellurophenes), polypyrroles, polyanilines, polycyclic aromatic polymers, copolymers thereof, and combinations thereof.
3. The dispersion of claim 2 , wherein the electrically conductive polymer is selected from the group consisting of a polyaniline, a polythiophene, a polypyrrole, a polymeric fused polycyclic heteroaromatic, copolymers thereof, and combinations thereof.
4. The dispersion of claim 1 , wherein the electrically conductive polymer is selected from the group consisting of unsubstituted polyaniline, poly(3,4-ethylenedioxythiophene), unsubstituted polypyrrole, poly(4-aminoindole), poly(7-aminoindole), poly(thieno(2,3-b)thiophene), poly(thieno(3,2-b)thiophene), and poly(thieno(3,4-b)thiophene).
5. The dispersion of claim 1 , wherein the highly-fluorinated acid polymer is at least 90% fluorinated.
6. The dispersion of claim 1 , wherein the highly-fluorinated acid polymer is selected from a sulfonic acid and a sulfonimide.
7. The dispersion of claim 1 , wherein the highly-fluorinated acid polymer is a perfluoroolefin having perfluoro-ether-sulfonic acid side chains.
8. The dispersion of claim 1 , wherein the highly-fluorinated acid polymer is selected from the group consisting of a copolymer of 1,1-difluoroethylene and 2-(1,1-difluoro-2-(trifluoromethyl)allyloxy)-1,1,2,2-tetrafluoroethanesulfonic acid and a copolymer of ethylene and 2-(2-(1,2,2-trifluorovinyloxy)-1,1,2,3,3,3-hexafluoropropoxy)-1,1,2,2-tetrafluoroethanesulfonic acid.
9. The dispersion of claim 1 , wherein the highly-fluorinated acid polymer is selected from a copolymer of tetrafluoroethylene and perfluoro(3,6-dioxa-4-methyl-7-octenesulfonic acid), and a copolymer of tetrafluoroethylene and perfluoro(3-oxa-4-pentenesulfonic acid).
10. The dispersion of claim 1 , wherein the solvent has a boiling point of greater than 120° C. at atmosphere pressure.
11. The dispersion of claim 1 , wherein the solvent is present in an amount of from 1 to 30 wt. %, based on the total weight of the dispersion.
12. The dispersion of claim 1 , wherein the solvent is selected from the group consisting of ethylene glycol, propylene glycol, diethylene glycol, glycerol, dimethylsulfoxide, dimethylacetamide, N-methylpyrrolidone, and mixtures thereof.
13. A film made from the dispersion of claim 1 .
14. An electronic device comprising at least one layer made from the dispersion of claim 1 .