Macroscale superlubricity achieved between zwitterionic copolymer hydrogel and sapphire in water
Achievement of macroscale superlubricity from the hydration effect could provide a potential johnny cash style clothing application for artificial articular cartilage.In this work, two zwitterionic polymers, 2-methacryloyloxyethyl phosphorylcholine (MPC) and sulfobetaine methacrylate (SBMA), were used to synthesize a P(MPC-co-SBMA) copolymer hydrog