The group’s members were pondering how to integrate graphene into the objects they print. They might mix the material into plastic or simply print it onto the surface of existing objects. There were still formidable hurdles. The researchers had figured out how to turn graphene into a liquid—no easy task, since the material is severely hydrophobic, which means that it clumps up and clogs the print heads. They needed to first convert graphene to graphene oxide, adding groups of oxygen and hydrogen molecules, but this process negates its electrical properties. So once they printed the object they would have to heat it with a laser. “When you heat it up,” Aby said, “you burn off those groups and reduce it back to graphene.”As any chemist could tell you, clumping and clogging is not the definition of 'hydrophobic' (although it certainly could be a symptom.)
I'm going to pat myself on the back for seeing an error/misinterpretation that slipped through The New Yorker's famed fact-checking department.