Janus Hollow Fiber Membrane-based DCMD Process for Desalination of High-Salinity Oilfield Produced Water

The overall objective of this study is to study a novel Janus hollow fiber (HF) membrane-based direct contact membrane distillation (DCMD) desalination process for the desalination of high-salinity produced water. Specifically, a novel polyvinylidene difluoride (PVDF) based Janus HF membrane was fabricated with a thin hydrophobic PVDF/Si-R outer surface and a thick hydrophilic PVDF/PEG inner surface. The DCMD desalination performance of the Janus HF membrane was thoroughly investigated to evaluate the energy efficiency of the desalination system.