Graphene-based multifunctional cosmetic compositions

Abstract

Cosmetic compositions, including hair coloring compositions, comprising graphene oxide (GO), reduced graphene oxide (r-GO), or both, and water are provided.

What is claimed is: 
     
         1 . A cosmetic composition comprising graphene oxide (GO), reduced graphene oxide (r-GO), or both; a water dispersible polymer; and water. 
     
     
         2 . The composition of  claim 1 , wherein the composition provides a coating on a keratin-based substrate to which the composition is applied after applying the composition to the substrate, rinsing the coated substrate, and drying the coated substrate. 
     
     
         3 . The composition of  claim 2 , wherein the coating of the coated substrate has an average thickness of at least 1 μm and the average thickness varies by no more than ±10% across the surface of the coated substrate. 
     
     
         4 . The composition of  claim 1 , wherein the composition is a hair coloring composition which changes a lightness (L*) value of the hair to which the composition is applied after applying the composition to the substrate, rinsing the substrate, and drying the substrate. 
     
     
         5 . The composition of  claim 1 , wherein the r-GO is chemically reduced GO. 
     
     
         6 . The composition of  claim 1 , wherein the water dispersible polymer is a compound which is soluble in water below a pH of 7 but which is insoluble in water above a pH of 7. 
     
     
         7 . The composition of  claim 1 , wherein the water dispersible polymer comprises amine groups. 
     
     
         8 . The composition of  claim 1 , wherein the water dispersible polymer is chitosan. 
     
     
         9 . The composition of  claim 1 , further comprising a second type of dispersant. 
     
     
         10 . The composition of  claim 9 , wherein the second type of dispersant is an acid. 
     
     
         11 . The composition of  claim 10 , wherein the second type of dispersant is ascorbic acid. 
     
     
         12 . The composition of  claim 1 , wherein the composition comprises an amount of r-GO selected to provide a predetermined L* value to hair to which the composition is applied using a predetermined application procedure. 
     
     
         13 . The composition of  claim 1 , wherein the composition comprises an amount of GO selected to provide a predetermined L* value to hair to which the composition is applied using a predetermined application procedure and after exposure to a predetermined amount of UV radiation or a predetermined amount of heat. 
     
     
         14 . The composition of  claim 1 , wherein the composition comprises an amount of GO and an amount of an additional coloring agent, both selected to provide a predetermined L* value to hair to which the composition is applied using a predetermined application procedure. 
     
     
         15 . The composition of  claim 1 , comprising at least 0.01 wt. % of the GO, the r-GO, or both; from 0.1 to 5 wt. % of the water dispersible polymer; from 0 to 10 wt. % of a second type of dispersant; from 0 to 10 wt. % of a co-solvent; from 0 to 10 wt. % of an additional coloring agent; and the water. 
     
     
         16 . The composition of  claim 15 , consisting essentially of the GO, the r-GO, or both; the water dispersible polymer; the water; optionally, the second type of dispersant;
 optionally, the co-solvent; and optionally, the additional coloring agent.   
     
     
         17 . The composition of  claim 1 , consisting essentially of the GO, the r-GO, or both; the water dispersible polymer; the water; optionally, a second type of dispersant; and optionally, a co-solvent. 
     
     
         18 . The composition of  claim 1 , wherein hair treated with the composition exhibits an L* value after 30 washes which has increased by no more than a factor of 1.75 as compared to an L* value of the treated hair before washing; wherein hair treated with the composition exhibits a surface static voltage after 30 washes which has increased by no more than a factor of 5 as compared to a surface static voltage of the treated hair before washing; or both. 
     
     
         19 . The composition of  claim 1 , wherein hair treated with the composition has a coating of the composition thereon having an average thickness after 30 washes which has decreased by no more than 50% as compared to an average thickness of the treated hair before washing. 
     
     
         20 . A method comprising applying a cosmetic composition comprising graphene oxide (GO), reduced graphene oxide (r-GO), or both; a water dispersible polymer; and water, to a keratin-based substrate to form a coating of the composition thereon and drying the coated substrate.