Nanofiltration with polyamide thin film composite membrane with ZIF-93/SWCNT intermediate layers on polyimide support
نویسندگان
چکیده
Among current separation processes, nanofiltration (NF), besides its easy scalability, exhibits low energy consumption, environmental impact and footprint, being widely used for water treatment solvent recovery. The development of membranes NF involves perfecting the skin selective layer, sublayers support. In this work, a multilayer structure membrane is presented where layer polyamide (PA, thickness 40–60 nm) was interfacially polymerized on sub-layer MOF ZIF-93 (thickness ∼ 50 grown another single-walled carbon nanotubes (SWCNT, 400 vacuum filtrated an asymmetric polyimide P84® support 200 μm). with PA/ZIF-93/SWCNT/P84 showed excellent results in methanol organic different dyes (with highest values permeances up to 57.6 84.5 L·m−2·h−1·bar−1, respectively, rejections usually greater than 99%). By means wide range characterization techniques (contact angle, AFM, XRD, ATR-FTIR FIB-SEM) role every component elucidated. fact, presence sublayer increased roughness hydrophilicity as well decreased PA layer. These effects are related fact that subordinate interfacial polymerization influence properties film therefore performance, even showing chlorine resistance ten-day cross-flow stability.
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ژورنال
عنوان ژورنال: Separation and Purification Technology
سال: 2023
ISSN: ['1873-3794', '1383-5866']
DOI: https://doi.org/10.1016/j.seppur.2022.122915