Silver-containing precursor and product articles containing cellulosic polymers
An article has a substrate and a pattern of a dry silver nanoparticle-containing composition comprising at least 20 weight % of one or more (a) polymers, that are cellulosic polymers; (d) silver nanoparticles having a mean particle size of 25-750 nm and present in an amount of 0.1-400 weight %, based on the total weight of the one or more (a) polymers; and (e) carbon black in an amount of 5-50 weight %, based on the total weight of the one or more (a) polymers. Such patterns can have multiple fine lines of any geometric arrangement. The article can have multiple patterns of this type, and each pattern can be electrolessly plated with a suitable metal such as copper to provide electrically-conductive product articles.
1. An article comprising a substrate, and having disposed on a supporting surface thereof, a pattern of a dry silver nanoparticle-containing composition comprising:
at least 20 weight % of one or more (a) polymers, based on the total weight of the pattern, which one or more (a) polymers are selected from one or more of cellulose acetate, cellulose acetate phthalate, cellulose acetate butyrate, cellulose acetate propionate, cellulose acetate trimellitate, hydroxypropylmethyl cellulose phthalate, methyl cellulose, ethyl cellulose, hydroxypropyl cellulose, hydroxyethyl cellulose, hydroxypropylmethyl cellulose, and carboxymethyl cellulose;
(d) silver nanoparticles having a mean particle size of at least 25 nm and up to and including 750 nm, that are present in the pattern in an amount of at least 0.1 weight % and up to and including 400 weight %, based on the total weight of the one or more (a) polymers;
(e) carbon black in an amount of at least 5 weight % and up to and including 50 weight %, based on the total weight of the one or more (a) polymers; and
less than 5 mol % of (b) reducible silver ions, based on the total molar amount of dry silver in the silver nanoparticle-containing composition.
2. The article of claim 1 , wherein the (d) silver nanoparticles have a mean particle size of at least 50 nm and up to and including 300 nm.
3. The article of claim 1 , wherein the (d) silver nanoparticles are present in an amount of at least 0.1 weight % and up to and including 5 weight %, based on the total weight of the one or more (a) polymers.
4. The article of claim 1 , wherein the (d) silver nanoparticles are present in an amount of at least 15 weight % and up to and including 200 weight %, based on the total weight of the one or more (a) polymers.
5. The article of claim 1 , wherein the substrate is a continuous flexible polymeric film, a metal foil, or a textile web.
6. The article of claim 1 , wherein the substrate is a transparent continuous polymeric film.
7. The article of claim 1 , wherein the one or more (a) polymers comprise one or more of carboxymethyl cellulose, cellulose acetate butyrate, cellulose acetate propionate, cellulose acetate, and hydroxypropyl cellulose.
8. The article of claim 1 , wherein the pattern of the dry silver nanoparticle-containing composition comprises a combination of fine lines, each fine line having an average dry width of at least 0.1 μm and up to and including 20 μm, which combination of fine lines can be arranged in parallel, crossing at any desired angle, a combination thereof, or in a random arrangement.
9. The article of claim 1 , wherein the substrate has a first supporting surface and a second opposing supporting surface, and one or more patterns of the dry silver nanoparticle-containing composition are disposed on the first supporting surface, and optionally, one or more patterns of the same or different dry silver nanoparticle-containing composition is disposed on the second opposing supporting surface.
10. The article of claim 1 , wherein the substrate is a transparent continuous polyester film that has a first supporting surface and a second opposing supporting surface,
the article further comprising multiple individual patterns formed on the first supporting surface which one or more multiple individual patterns comprise the same or different dry silver nanoparticle-containing compositions, and further comprising multiple opposing patterns formed on the second opposing supporting surface that comprise the same or different dry silver nanoparticle-containing compositions.
11. The article of claim 10 , wherein all of the multiple individual patterns on both the first supporting surface and the second opposing supporting surface comprise the same dry silver nanoparticle-containing composition, the (d) silver nanoparticles in each individual pattern having a mean particle size of at least 50 nm and up to and including 300 nm, and each of the multiple individual patterns comprising fine lines having an average dry width of at least 0.1 μm and up to and including 20 μm.
12. The article of claim 1 , wherein the pattern of the dry silver nanoparticle-containing composition further comprises at least 5 weight % and up to and including 25 weight % of a carbon black, based on the total weight of the one or more (a) polymers.
13. The article of claim 1 , further comprising a pattern of electrolessly plated metal that is disposed solely on the pattern of the dry silver nanoparticle-containing composition.
14. The article of claim 13 , wherein the substrate is a continuous flexible polymeric film, a metal foil, or a textile web.
15. The article of claim 13 , wherein the substrate is a transparent continuous polymeric film.
16. The article of claim 13 , wherein the one or more (a) polymers comprise one or more of carboxymethyl cellulose, cellulose acetate butyrate, cellulose acetate propionate, cellulose acetate, or hydroxypropyl cellulose.
17. The article of claim 13 , wherein the pattern of electrolessly plated metal comprises a combination of fine lines, each fine line having an average dry width of at least 0.1 μm and up to and including 20 μm, which combination of fine lines can be arranged in parallel, crossing at any desired angle, or a combination thereof or in a random arrangement.
18. The article of claim 13 , wherein the substrate has a first supporting surface and a second opposing supporting surface, and comprises one or more patterns of electrolessly plated metal disposed on the first supporting surface, and optionally, one or more patterns of electroless plated metal disposed on the second opposing supporting surface.
19. The article of claim 13 , wherein the substrate is a transparent continuous polyester film that has a first supporting surface and a second opposing supporting surface,
the article further comprising multiple individual patterns of electrolessly plated copper formed on the first supporting surface, and comprising multiple individual patterns of electrolessly plated copper formed on the second opposing supporting surface.
20. The article of claim 13 , wherein the electrolessly plated metal is copper.