Key Words:lamination; LLDPE film; superhydrophobicity
Abstract:Fabrication of superhydrophobic films of polypropylene and of three different types of polyethylene was performed using a facile hot-press lamination and peeling process, which successfully fabricated a superhydrophobic film of linear low-density polyethylene (LLDPE). The water contact angle on the superhydrophobic reached as high as 160 degrees, and the roll-off angle decreased to below 7 degrees. The superhydrophobicity of the LLDPE film was attributed to a special surface morphology comprising micron- and submicron-sized fiber-like structures fabricated on the film surface by the hot-press lamination and peeling process. The method is based on the mutual adhesion and interdiffusion of polymer chains at the film interface during hot-press lamination and on the subsequent unzipping of the morphology during the peeling at room temperature. The effects of varying hot-pressing temperature and time on the surface morphology and wetting characteristics of the fabricated LLDPE films were also investigated.
Volume:36
Issue:6
Translation or Not:no