Development of Robust Fluorinated SiO2/PVDF Composite Hollow Fiber Membrane for Bromine Resources Recovery from Brine via Membrane Distillation

• DOI: 10.1021/acsestwater.2c00434
• Publication Date: 2022-11-30T08:53:53Z
• Authors: Zhiyu Jin; Yuqing Lin; Yiren Zhang; Jiadi Ying; Vitaly Gitis; Jianguo Yu
• Keywords: Membrane Distillation; Brine; Hollow fiber membrane; Polyvinylidene fluoride

In this study, a superhydrophobic composite hollow fiber membrane consisting of fluorinated silicification layer (fSiO2) upon poly(vinylidene fluoride) (PVDF) substrate was developed via in situ integrated with surface hydrophobic modification for bromine resources recovery from brine distillation (MD). The re-entrant hierarchical structure established silicification, after which (1H,1H,2H,2H-heptadecafluorodecyl) silane introduced to transfer the property be by reducing energy long chains. resultant fSiO2/PVDF exhibited water contact angle 147°, effectively prevents wetting when conducting MD, and performed high permeating flux 0.62 kg·m–2·h–1. long-term stability test 10-day operation duration, remained decent, declines 1.8% 38.3% treated aqueous solution real brine, respectively. This work sheds insight into fabrication novel inorganic/organic membranes resource extraction brine.