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Development of Robust Fluorinated SiO2/PVDF Composite Hollow Fiber Membrane for Bromine Resources Recovery from Brine via Membrane Distillation
https://orcid.org/0000-0002-9322-346X
In this study, a superhydrophobic composite hollow fiber membrane consisting of a fluorinated silicification layer (fSiO2) upon a poly(vinylidene fluoride) (PVDF) substrate was developed via in situ silicification integrated with surface hydrophobic modification for bromine resources recovery from brine via membrane distillation (MD). The re-entrant hierarchical structure was established via surface silicification, after which (1H,1H,2H,2H-heptadecafluorodecyl) silane was introduced to transfer the surface property to be hydrophobic by reducing the surface energy with long fluorinated chains. The resultant fSiO2/PVDF composite membrane exhibited a superhydrophobic property with a water contact angle of 147°, which effectively prevents wetting when conducting MD, and performed a high permeating flux of 0.62 kg·m–2·h–1. In a long-term stability test of 10-day operation duration, the fSiO2/PVDF composite membrane remained decent, with flux declines of 1.8% and 38.3% when treated by the aqueous bromine solution and real brine, respectively. This work sheds insight into the fabrication of novel inorganic/organic composite membranes for bromine resource extraction from brine.
A superhydrophobic composite hollow fiber membrane consisting of a fluorinated silicification layer upon polyvinylidene fluoride substrate was developed for highly efficient bromine resources extraction via membrane distillation.
Development of Robust Fluorinated SiO2/PVDF Composite Hollow Fiber Membrane for Bromine Resources Recovery from Brine via Membrane Distillation
https://orcid.org/0000-0002-9322-346X
In this study, a superhydrophobic composite hollow fiber membrane consisting of a fluorinated silicification layer (fSiO2) upon a poly(vinylidene fluoride) (PVDF) substrate was developed via in situ silicification integrated with surface hydrophobic modification for bromine resources recovery from brine via membrane distillation (MD). The re-entrant hierarchical structure was established via surface silicification, after which (1H,1H,2H,2H-heptadecafluorodecyl) silane was introduced to transfer the surface property to be hydrophobic by reducing the surface energy with long fluorinated chains. The resultant fSiO2/PVDF composite membrane exhibited a superhydrophobic property with a water contact angle of 147°, which effectively prevents wetting when conducting MD, and performed a high permeating flux of 0.62 kg·m–2·h–1. In a long-term stability test of 10-day operation duration, the fSiO2/PVDF composite membrane remained decent, with flux declines of 1.8% and 38.3% when treated by the aqueous bromine solution and real brine, respectively. This work sheds insight into the fabrication of novel inorganic/organic composite membranes for bromine resource extraction from brine.
A superhydrophobic composite hollow fiber membrane consisting of a fluorinated silicification layer upon polyvinylidene fluoride substrate was developed for highly efficient bromine resources extraction via membrane distillation.
Development of Robust Fluorinated SiO2/PVDF Composite Hollow Fiber Membrane for Bromine Resources Recovery from Brine via Membrane Distillation
https://orcid.org/0000-0002-9322-346X
In this study, a superhydrophobic composite hollow fiber membrane consisting of a fluorinated silicification layer (fSiO2) upon a poly(vinylidene fluoride) (PVDF) substrate was developed via in situ silicification integrated with surface hydrophobic modification for bromine resources recovery from brine via membrane distillation (MD). The re-entrant hierarchical structure was established via surface silicification, after which (1H,1H,2H,2H-heptadecafluorodecyl) silane was introduced to transfer the surface property to be hydrophobic by reducing the surface energy with long fluorinated chains. The resultant fSiO2/PVDF composite membrane exhibited a superhydrophobic property with a water contact angle of 147°, which effectively prevents wetting when conducting MD, and performed a high permeating flux of 0.62 kg·m–2·h–1. In a long-term stability test of 10-day operation duration, the fSiO2/PVDF composite membrane remained decent, with flux declines of 1.8% and 38.3% when treated by the aqueous bromine solution and real brine, respectively. This work sheds insight into the fabrication of novel inorganic/organic composite membranes for bromine resource extraction from brine.
A superhydrophobic composite hollow fiber membrane consisting of a fluorinated silicification layer upon polyvinylidene fluoride substrate was developed for highly efficient bromine resources extraction via membrane distillation.
Development of Robust Fluorinated SiO2/PVDF Composite Hollow Fiber Membrane for Bromine Resources Recovery from Brine via Membrane Distillation
Jin, Zhiyu (author) / Lin, Yuqing (author) / Zhang, Yiren (author) / Ying, Jiadi (author) / Gitis, Vitaly (author) / Yu, Jianguo (author)
ACS ES&T Water ; 3 ; 1874-1883
2023-07-14
Article (Journal)
Electronic Resource
English
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