Robust and Superhydrophobic PTFE Membranes with Crosshatched Nanofibers for Membrane Distillation and Carbon Dioxide Stripping
نویسندگان
چکیده
Polytetrafluoroethylene (PTFE) nanofiber membranes with novel crosshatched structures are developed and applied to both water desalination by direct contact membrane distillation (MD) CO2 separation gas absorption. Crosshatched produced from a PTFE-poly(ethylene oxide)(PEO) emulsion depositing alternating layers of aligned fibers oriented in perpendicular directions. This is followed sintering remove the PEO stabilize structure. The structure allows for rapid vapor transport due low tortuosity high porosity, leading fast effective separation. PTFE these ideal stripping as this polymer inherently strong very hydrophobic. mass transfer MD greatly improved nanofibers (CNF) well composite microparticles (CNF-MP), compared conventional random nanofibers. exhibit flux up 98.5 ± 1.2 kg m−2h−1, significantly greater than standard asymmetric morphology, when tested 3.5 wt% sodium chloride feed solution at 80 °C 20 °C.
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ژورنال
عنوان ژورنال: Advanced Materials Interfaces
سال: 2022
ISSN: ['2196-7350']
DOI: https://doi.org/10.1002/admi.202200786