Abstract:Study of non-wetting and non-adhesion of liquid metal/glass is of great significance for storage, recovery and mobile transportation of gallium based liquid metal. GaIn20.5Sn13 liquid metal was prepared by atmosphere protection melting method, and glass sheets with different surface morphologies were prepared by sanding and coating with different types of sandpaper, so as to study wetting and adhesion behavior of different glass surfaces. Scanning electron microscope (SEM), atomic force microscope (AFM) and contact angle measuring instrument were used to test and characterize surface morphology, surface roughness and wetting behavior of different glasses, and rolling angle was tested on surface. The results show that both roughening treatment and coating treatment can reduce wettability of alloy droplet on glass surface and improve fluidity of alloy droplet. Contact angle of droplets on surface of glass rises with increase of surface roughness, when roughness is 187.9 nm, surface contact Angle is 150.6°. Combining surface roughness and coating treatment, gallium non-wetting liquid metal base and no adhesion of surface of glass are prepared, contact angle is up to 160.4°, roll angle of alloy droplet on surface of glass is 15°, and rolling lag angle is 3°.