Enhanced anti-wetting, slippery-surface membranes engineered for long-term operation with hypersaline synthetic and seawater feeds in membrane distillation
- Authors
- Khan, Aftab Ahmad; Kim, Jong-Oh
- Issue Date
- Apr-2021
- Publisher
- Korean Society of Industrial Engineering Chemistry
- Keywords
- Antifouling and antiwetting; Fluorinated silica nanoparticles; Hypersaline feed; Long-term operation; Membrane distillation; Slippery membrane surface
- Citation
- Journal of Industrial and Engineering Chemistry, v.96, pp.330 - 338
- Indexed
- SCIE
SCOPUS
KCI
- Journal Title
- Journal of Industrial and Engineering Chemistry
- Volume
- 96
- Start Page
- 330
- End Page
- 338
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/1489
- DOI
- 10.1016/j.jiec.2021.01.038
- ISSN
- 1226-086X
- Abstract
- This study aimed to prepare a membrane by engineering a “slippery” surface on a polyethersulfone (PES) membrane for long-term, direct-contact membrane distillation (DCMD). Membrane surfaces and wettability were analyzed using field-emission scanning electron microscopy, atomic force microscopy, and attenuated total reflection–Fourier-transform infrared spectroscopy. Contact angles and liquid entry pressures also were measured. The wetting and fouling-resistance competence of the modified PES membrane (PES-M) in DCMD was assessed using two hypersaline feed solutions, i.e., multiple salts (2000 mg L−1 [CaSO4 + CaCO3 + CaCl2∙2H2O + NaCl]) + 20 mg L−1 humic acid (MSHA-F) and Busan seawater feed. The effectiveness of the PES-M membrane against the MSHA-F solution was evaluated over multiple cycles. The membrane was cleaned after each 50-h cycle and successfully reused for three consecutive cycles after cleaning with a clean-in-place method. The PES-M membrane displayed robust performance against both feeds, particularly against MSHA-F for 150 h, during which it lost only 20% flux and showed a final conductivity of 68.8 μS/cm. The PES-M membrane is a resilient candidate that can resist fouling and wetting.
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