Insulation film
Aspects of the disclosure generally relate to an insulation film, including a thermal insulation film or an insulation film for a cooking appliance. The insulation film can include a substrate, a first layer comprising silver nanowires proximate to the substrate, and a second layer comprising porous alumina proximate to the first layer and distal from the substrate.
1. An insulation film for a cooking appliance, comprising:
a substrate;
a first layer comprising silver nanowires proximate to the substrate; and
a second layer comprising porous alumina proximate to the first layer and distal from the substrate, with the porous alumina having an average pore size of 10-35 micrometers.
2. The insulation film of claim 1 , wherein the silver nanowires have a diameter of 10-20 micrometers.
3. The insulation film of claim 2 , wherein the silver nanowires have a spacing of 150-200 nanometers.
4. The insulation film of claim 3 , wherein the silver nanowires have an area density of 0.15-0.25 g/m 2 .
5. The insulation film of claim 1 , wherein the first layer comprises a first layer thickness of 50-100 micrometers.
6. The insulation film of claim 5 , wherein the second layer comprises a second layer thickness of 50-100 micrometers.
7. The insulation film of claim 6 , further comprising an overall thickness defined by the first layer thickness, the second layer thickness, and a substrate thickness of the substrate, wherein the overall thickness is between 200-250 micrometers.
8. The insulation film of claim 1 , wherein the substrate comprises an adhesive.
9. The insulation film of claim 1 , wherein the first layer further comprises a polymeric material with the silver nanowires dispersed within the polymeric material.
10. The insulation film of claim 1 , wherein the silver nanowires form at least one of a structured mesh or an unstructured mesh.
11. The insulation film of claim 2 , further comprising additional silver nanowires dispersed within the second layer.
12. The insulation film of claim 11 , wherein the additional silver nanowires have a diameter of 10-20 nanometers.
13. The insulation film of claim 12 , wherein the additional silver nanowires have a length of 10-80 micrometers.
14. The insulation film of claim 13 , wherein the additional silver nanowires have an average spacing of 150-200 nanometers.
15. The insulation film of claim 1 , wherein the first layer further comprises porous alumina silicate.
16. A thermal insulation film, comprising:
a first layer comprising a mesh of silver nanowires with a diameter of 10-20 micrometers and an area density of 0.15-0.25 g/m 2 ; and
a second layer abutting the first layer and comprising porous alumina with an average pore size of 10-35 micrometers;
wherein an emissivity of the first layer is between 0.02-0.8.
17. The thermal insulation film of claim 16 , further comprising an adhesive substrate coupled to the first layer.
18. The thermal insulation film of claim 16 , further comprising additional silver nanowires dispersed within the second layer.
19. The thermal insulation film of claim 18 , wherein the additional silver nanowires have at least one of a diameter of 10-20 nanometers, a length of 10-80 micrometers, or an average spacing of 150-200 nanometers.
20. The thermal insulation film of claim 16 , wherein the first layer comprises a first layer thickness between 50-100 micrometers, and wherein the second layer comprises a second layer thickness between 50-100 micrometers.