Maybe you are thinking of carbon nanotubes? Those have been demonstrated to cause mesothelioma
Never mind human hair; how about antistatic brushes and dustmops? Coatings for photographic backgrounds, liners for telescope tubes, heat-absorbent building material. Anyplace a dark, weather-resistant coating is needed.
Sorry for pessimism, but I have been disappointment with nearly every other graphene miracle product so far. Waiting for this one to not pan out as well. Why doesn't Popular Science just do full graphene publications since I am always equally disappointment by how many amazing things in there never pan out.