SKM 2023 – wissenschaftliches Programm
DY 47.1: Vortrag
Donnerstag, 30. März 2023, 15:00–15:15, MER 02
Hierarchical superhydrophobic composite membrane for enhanced distillation with excellent fouling resistance — •Prexa Shah1, Youmin Hou2, Michael Kappl1, and Hans Jürgen Butt1 — 1Max-Planck-Institute for Polymer Research, Physics at Interfaces group, Ackermannweg 10, 55128 Mainz, Germany. — 2School of Power and Mechanical Engineering, Wuhan University, 430072, Wuhan, China.
In arid areas near the coast, seawater desalination has become an essential supply of clean water. As a result, energy-efficient desalination systems must be developed to avoid overburdening the restricted energy supply. Membrane distillation (MD) is gaining popularity as a hybrid thermal/membrane-based desalination approach that may use waste heat for small-scale desalination as well as treating high-salinity brines. The objective is now to maximize the distillation rate while avoiding membrane wetting and fouling. In this work, composite membranes with multiscale pore sizes are formed by depositing a thin layer of nano-porous nanofilaments over microporous membranes. Distillation performance and fouling resistance are explored utilizing low surface tension impurities, which might enhance the chance of membrane wetting. The resistance of protein adsorption to organic fouling is also examined. Our unique multiscale porous membranes outperform traditional hydrophobic membranes in terms of fouling resistance while achieving better distillation flow. This research shows how to optimize MD procedures for wastewater and saltwater treatment.