Fabrication of durable fluorine-free superhydrophobic polyethersulfone (PES) composite coating enhanced by assembled MMT-SiO2 nanoparticles

摘要

A durable fluorine-free polyethersulfone (PES) superhydrophobic composite coating with excellent wear resistant and anti-corrosion properties has been successfully fabricated by combining sol-gel and spray technology. The robust microano-structures of the prepared surface were established by introducing binary montmorillonite-silica (MMT-SiO2) assembled composite particles, which were formed by in-situ growth of SiO2 on MMT surfaces via sol-gel. Combined with the low surface energy of amino silicon oil (APDMS), the fluorine-free superhydrophoic PES coating was obtained with high water contact angle 156.1 +/- 1.1 degrees and low sliding angle 4.8 +/- 0.7 degrees.