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Bio-inspired fabrication of asymmetric wettability Janus porous membrane for secure F-oil infused F-free-membrane filtration
- Wang, Zhecun, Yao, Jin, Li, Ziqin, Yang, Kuan, Guo, Jing, Zhang, Suobo, Sherazi, Tauqir A., Li, Shenghai
- Journal of membrane science 2018 v.566 pp. 161-167
- artificial membranes, hydrophilicity, hydrophobicity, liquids, lubricants, microfiltration, models, mussels, oils, porous media, proteins, wettability
- Porous membranes, which consist of air-filled or liquid-filled pores, provide a gating strategy for tunable multiphase selectivity separation, and exhibit tremendous application potential in fields involving intelligent liquid management. Herein, we report the fabrication of a novel asymmetric wettability Janus porous membrane (JPM) based on bio-inspired models that integrate the air-gate floating mechanism and adhesive proteins secreted by mussels to attach to material-independent surfaces. The JPM fabricated through this novel and straightforward methodology has distinct hydrophobic-hydrophilic properties and interfacial compatibility. These features were engineered for F-oil (lubricant oil, Dupont Krytox 105) infused F-free JPM membrane filtration. The hydrophilic layer infused with high-surface-energy water acts as a perfect barrier (liquid gating) preventing invasion of the low-surface-energy F-oil which was infused in the hydrophobic surface, protecting the F-oil in the JPM. This is the first report regarding F-oil infused membrane filtration using the F-free-membrane, which can overcome the limitations of F-substrates for F-oil infused filtration.