Window film and vehicle using the same

Abstract

A window film includes a polymer film, at least one carbon nanotube film, and a protective layer. The at least one carbon nanotube film is embedded in the polymer film. The protective layer is located on a surface of the polymer film. The at least one carbon nanotube film is located between the protective layer and the polymer film.

1 . A window film, comprising:
 a polymer film;   at least one carbon nanotube film embedded in the polymer film, the at least one carbon nanotube film having a plurality of carbon nanotubes substantially aligned along a same direction; and   a protective layer located on a surface of the polymer film, the at least one carbon nanotube film located between the protective layer and the polymer film.   
     
     
         2 . The window film of  claim 1 , wherein the at least one carbon nanotube film is a free-standing structure, and combined with the polymer film to form a whole structure. 
     
     
         3 . The window film of  claim 1 , wherein the at least one carbon nanotube film comprises a plurality of successively oriented carbon nanotube segments joined end-to-end by Van der Waals attractive force therebetween. 
     
     
         4 . The window film of  claim 3 , wherein the carbon nanotube segment comprises a plurality of carbon nanotubes substantially parallel to each other, and combined by Van der Waals attractive force therebetween. 
     
     
         5 . The window film of  claim 1 , wherein the at least one carbon nanotube film comprises a plurality of interspaces between the carbon nanotubes of the at least one carbon nanotube film. 
     
     
         6 . The window film of  claim 5 , wherein the polymer film fills in the plurality of interspaces of the at least one carbon nanotube film. 
     
     
         7 . The window film of  claim 1 , wherein each of the at least one carbon nanotube film is transparent, and has a light transmittance in a range from about 60% to about 95%. 
     
     
         8 . The window film of  claim 1 , wherein the at least one carbon nanotube film comprises a plurality of carbon nanotube films positioned in the polymer film. 
     
     
         9 . The window film of  claim 8 , wherein the plurality of carbon nanotube films are spaced from each other. 
     
     
         10 . The window film of  claim 8 , wherein the plurality of carbon nanotube films are stacked one on another, an angle between aligned directions of the carbon nanotubes in two adjacent carbon nanotube films is about 90 degrees. 
     
     
         11 . The window film of  claim 10 , wherein adjacent carbon nanotube films of the plurality of carbon nanotube films are combined by the Van der Waals attractive force therebetween. 
     
     
         12 . The window film of  claim 1 , wherein the polymer film is made of polycarbonate (PC), polymethyl methacrylate acrylic (PMMA), polyethylene terephthalate (PET), polyether polysulfones (PES), polyvinyl polychloride (PVC), benzocyclobutenes (BCB), polyesters, or acrylic resins. 
     
     
         13 . The window film of  claim 1 , wherein the protective layer is made of polycarbonate (PC), polymethyl methacrylate acrylic (PMMA), polyethylene terephthalate (PET), polyether polysulfones (PES), polyvinyl polychloride (PVC), benzocyclobutenes (BCB), polyesters, acrylic resins, or epoxy resin. 
     
     
         14 . A window film, comprising:
 a polymer film having a top surface;   at least one carbon nanotube film embedded in the polymer film, the at least one carbon nanotube film having a plurality of carbon nanotubes substantially aligned along a same direction;   a metal layer coated on a surface of the at least one carbon nanotube film; and   a protective layer located on the top surface of the polymer film, the at least one carbon nanotube film disposed between the protective layer and the polymer film.   
     
     
         15 . The window film of  claim 14 , wherein the metal layer is coated on outer surfaces of the carbon nanotubes of the at least one carbon nanotube film. 
     
     
         16 . The window film of  claim 15 , wherein a material of the metal layer is gold (Au), silver (Ag), copper (Cu), nickel (Ni), palladium (Pd), or titanium (Ti). 
     
     
         17 . The window film of  claim 14 , wherein the at least one carbon nanotube film comprises a plurality of interspaces between the carbon nanotubes of the at least one carbon nanotube film. 
     
     
         18 . The window film of  claim 17 , wherein the polymer film fills in the plurality of interspaces of the at least one carbon nanotube film. 
     
     
         19 . A vehicle, comprising:
 at least one window film attached on a window of the vehicle, the at least one window film comprising:
 a polymer film; 
 at least one carbon nanotube film embedded in the polymer film, the at least one carbon nanotube film comprising a plurality of carbon nanotubes substantially aligned along a same direction; and 
   a protective layer covering at least one of surfaces of the polymer film and the at least one carbon nanotube film.   
     
     
         20 . The vehicle of  claim 19 , further comprising a metal layer coated on outer surfaces of the carbon nanotubes of the at least one carbon nanotube film.