Facile Surface Superhydrophilic Modification: NVP/MBA Inverse Microemulsion Surface‐Grafting Polymerization Initiated by UV Light

Summary: Superhydrophilic modification of poly(propylene) and poly(ethylene terephthalate) films' surfaces was realized by the UV‐initiated surface photografting of a N ‐vinyl pyrrolidone/ N , N ′‐methylenebisacrylamide inverse microemulsion. AFM characterization of the treated films' surface revealed that it was the grafted quasi‐bimodal (ca. 45 and 110 nm) particles of cross‐linked poly( N ‐vinyl pyrrolidone) that led to superhydrophilicity of the surface. The grafted nanometer‐scale particles showed little influence on the transparency of the substrate's surface, but endowed long‐term stability to the superhydrophilicity.The surface morphology of the PP film grafted with a NVP/MBA inverse microemulsion via a one‐step method. Quasi‐bimodal particles (ca. 45 nm and 110 nm) were tethered on the film's surface, and the corresponding surface water CA fell below 5°.