	US 12,144,877 B2
	Graphene-based multifunctional cosmetic compositions
Lingye Zhou, Evanston, IL (US); Jiaxing Huang, Wilmette, IL (US); and Chong Luo, Evanston, IL (US)
Assigned to Northwestern University, Evanston, IL (US)
Filed by Northwestern University, Evanston, IL (US)
Filed on Sep. 7, 2021, as Appl. No. 17/467,705.
Application 17/467,705 is a division of application No. 16/163,182, filed on Oct. 17, 2018, abandoned.
Claims priority of provisional application 62/573,775, filed on Oct. 18, 2017.
Prior Publication US 2021/0401689 A1, Dec. 30, 2021
Int. Cl. A61K 8/19 (2006.01); A61K 8/67 (2006.01); A61K 8/73 (2006.01); A61Q 5/10 (2006.01)

CPC A61K 8/19 (2013.01) [A61K 8/676 (2013.01); A61K 8/736 (2013.01); A61Q 5/10 (2013.01)]

17 Claims

1. A method for treating a keratin-based substrate, the method comprising:

applying a cosmetic composition to a keratin-based substrate to form a coating of the composition thereon, the composition comprising graphene oxide (GO), reduced graphene oxide (r-GO), or both as a graphene-based material, a water dispersible polymer, and water, wherein the composition does not comprise the water dispersible polymer covalently bound to the graphene-based material;

drying the coated keratin-based substrate, wherein the keratin-based substrate is hair having a lightness (L*) value and wherein the amount of the GO, the r-GO, or both, is selected to provide the coated hair with a changed L* value; and

exposing different regions of the coated hair to different amounts of UV radiation or heat to obtain different L* values in the different regions.