*1.3.6 Plasma treatment*

Nonthermal plasma technique is also prevalent these days to modify the surface of nanoparticles. This plasma technique enhances the compatibility between nanoparticles and polymer by modifying the interfacial area of nanoparticles. The plasma is produced by using a dielectric barrier discharge, which generates ions and reactive species high-energy electrons that interact with the surface of nanoparticles to modify their surface characteristics [14]. Therefore, higher surface reactivity and stronger interactions between the nanoparticles and the surrounding polymers can be acquired, comparing with traditional coupling agent modification.
