Method for the production of functionalized elastomeric manufactured articles and manufactured articles thus obtained
A method is described for the production of a manufactured article ( 20 ) constituted of an elastomeric polymer substrate, in selected zones of which there are deposits of particles of nanometric size of a metal or some other compound which create a region ( 24 ) of the polymeric element having desired electrical, biocompatibility and/or dielectric properties, and such that said properties are maintained even after numerous elastic deformations of the manufactured article; the invention also relates to functionalized elastomeric manufactured articles obtained by means of said method.
1. A biocompatible elastomeric device, said device comprising:
an elastomeric support comprising polydimethylsiloxane, said elastomeric support having a surface layer portion and a lower portion, and
one or more functionalized and geometrically defined nanocomposite regions within the surface layer portion of the elastomeric support, said one or more nanocomposite regions comprising neutral nanoclusters of metal, metal oxide, or other metal compound, said neutral nanoclusters having a dimension of between 1 nm to 10 nm and a density within the surface layer portion of less than about 1×10 −3 nanoclusters/nm 3 , wherein said one or more nanocomposite regions is an electrical insulator.
2. The elastomeric device according to claim 1 , wherein the thickness of the nanocomposite region is between 5 nm and 10 μm, and the thickness of the elastomeric support is between 500 nm and 1 mm.
3. The elastomeric device according to claim 1 , wherein the thickness of the nanocomposite region is between 50 nm and 1 μm, and the thickness of the elastomeric support is between 500 nm and 1 mm.
4. The elastomeric device according to claim 1 , wherein the neutral nanoclusters of the nanocomposite region emerge on the surface of said elastomer support.
5. The elastomeric device according to claim 1 further comprising:
a polymeric matrix that encapsulates the elastomeric support.
6. The elastomeric device according to claim 5 , wherein said polymer matrix comprises openings for forming electrodes in said nanocomposite regions, openings for connecting electrical conductors to said nanocomposite regions, or openings for constituting sites of cellular growth.
7. A biocompatible elastomeric device, said device comprising:
an elastomeric support comprising polydimethylsiloxane, said elastomeric support having a surface layer portion and a lower portion, and
one or more functionalized and geometrically defined nanocomposite regions within the surface layer portion of the elastomeric support, said one or more nanocomposite regions comprising neutral nanoclusters of metal, metal oxide, or other metal compound, said neutral nanoclusters having a dimension of between 1 nm to 10 nm and a density within the surface layer portion of about 1×10 −3 to about 5×10 −3 nanoclusters/nm 3 , wherein said one or more nanocomposite regions is a piezoresistive electrical conductor.
8. The elastomeric device according to claim 7 , wherein the thickness of the nanocomposite region is between 5 nm and 10 μm, and the thickness of the elastomeric support is between 500 nm and 1 mm.
9. The elastomeric device according to claim 7 , wherein the thickness of the nanocomposite region is between 50 nm and 1 μm, and the thickness of the elastomeric support is between 500 nm and 1 mm.
10. The elastomeric device according to claim 7 , wherein the neutral nanoclusters of the nanocomposite region emerge on the surface of said elastomer support.
11. The elastomeric device according to claim 10 , wherein the neutral nanoclusters emerging on the surface of the elastomeric support form a continuous metal deposit.
12. The elastomeric device according to claim 7 , wherein when said nanocomposite region of said article is subject to 40% elongation strain, its electrical resistance increases by a value of between 250% and 500% relative to the resistance of said nanocomposite region at rest.
13. The elastomeric device according to claim 7 further comprising:
a polymeric matrix that encapsulates the elastomeric support.
14. The elastomeric device according to claim 13 , wherein said polymer matrix comprises openings for forming electrodes in said nanocomposite regions, openings for connecting electrical conductors to said nanocomposite regions, or openings for constituting sites of cellular growth.
15. A biocompatible elastomeric device, said device comprising:
an elastomeric support comprising polydimethylsiloxane, said elastomeric support having a surface layer portion and a lower portion, and
one or more functionalized and geometrically defined nanocomposite regions within the surface layer portion of the elastomeric support, said one or more nanocomposite regions comprising neutral nanoclusters of metal, metal oxide, or other metal compound, said neutral nanoclusters having a dimension of between 1 nm to 10 nm and a density within the surface layer portion of greater than about 5×10 −3 nanoclusters/nm 3 , wherein said one or more nanocomposite regions is a resilient electrical conductor.
16. The elastomeric device according to claim 15 , wherein the thickness of the nanocomposite region is between 5 nm and 10 μm, and the thickness of the elastomeric support is between 500 nm and 1 mm.
17. The elastomeric device according to claim 15 , wherein the thickness of the nanocomposite region is between 50 nm and 1 μm, and the thickness of the elastomeric support is between 500 nm and 1 mm.
18. The elastomeric device according to claim 15 , wherein the neutral nanoclusters of the nanocomposite region emerge on the surface of said elastomer support.
19. The elastomeric device according to claim 18 , wherein the neutral nanoclusters emerging on the surface of the elastomeric support form a continuous metal deposit.
20. The elastomeric device according to claim 15 , wherein when said nanocomposite region of said article is subject to 40% elongation strain, its electrical resistance increases by a value less than 250% relative to the resistance of said nanocomposite region at rest.
21. The elastomeric device according to claim 15 further comprising:
a polymeric matrix that encapsulates the elastomeric support.
22. The elastomeric device according to claim 21 , wherein said polymer matrix comprises openings for forming electrodes in said nanocomposite regions, openings for connecting electrical conductors to said nanocomposite regions, or openings for constituting sites of cellular growth.