Mist harvesting using bioinspired polydopamine coating and microfabrication technology

摘要: Abstract The fascinating biopolymer of polydopamine (PDA) and negative photolithography method was utilized to produce porous membrane surfaces with contrast wettabilities via creating hydrophilic patterns (nanoscale PDA coated SU-8 bumps) on the hydrophobic background polypropylene (PP) membranes. high rate water collection (97 mg cm− 2 h− 1) highlighted impact wetting properties mist-harvesting results. Modified samples exhibited droplet motion by coalescence rather than rolling which means created also have a significant behavior droplets these surfaces. Surface characterization including Scanning Electron Microscopy (SEM), Atomic Force (AFM) contact angle as well surface free energy measurement were performed study effect topography roughness system performance. This structure has great potential be fabricated in large scale. Also, due nature its background, can substantially increased using vacuum pressure, makes it attractive for industry.