Improved oily wastewater rejection and flux of hydrophobic PVDF membrane after polydopamine-polyethyleneimine co-deposition and modification
نویسندگان
چکیده
The surface structure and properties of a membrane largely determine its in-service performance during filtration process. Polyvinylidene fluoride (PVDF) hydrophobic is widely used in the separation oily wastewater because mechanical strength, but susceptible to oil fouling, whereas hydrophilic membranes are easily damaged water due their wettability resistant oil. advantages two then combined by modifying be maintain stability, antifouling performance. PVDF ultrafiltration were modified with mixture different concentrations polydopamine (PDA) polyethyleneimine (PEI) using deposition times (6, 12, 24 h) characterized SEM, FTIR, contact angle. Membrane was tested dead-end module for 60 min. PDA-modified showed decrease hydrophilicity from 88.1° 77.7° after being coated 0.5 g/L PDA 6 h, while addition 2 PEI, reached 64.6° SEM characterization presence aggregates formed polymerization process decreased PEI. This line results obtained test where smaller aggregate, greater flux produced. FTIR strong bond between PDA-PEI as concentration coating time increased.
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ژورنال
عنوان ژورنال: South African Journal of Chemical Engineering
سال: 2023
ISSN: ['2589-0344', '1026-9185']
DOI: https://doi.org/10.1016/j.sajce.2023.01.006