Facile synthesis of micro-eggette patterned nanofiltration membrane with enhanced anti-fouling and rejection performance

Interfacial polymerization at unconventional interfaces: an emerging strategy to tailor thin-film composite membranes

“…To fully reveal and achieve improved surface flow characteristics, the researchers made great efforts and investigated various topographies, e.g., wavy, 100 sharkskinmimetic 101,102 and eggette patterns. 103 Recently, Shang et al have reported a patterned polyamide composite membrane with a uniformly distributed micro-eggette pattern with a width and height of 8.5 mm and 4 mm, respectively. This novel eggette morphology promoted the local turbulence and enhanced the shear stress of flow on the membrane surface, resulting in improved fouling resistance and 3% higher removal of perfluorooctane sulfonate pollutants.…”

“…This novel eggette morphology promoted the local turbulence and enhanced the shear stress of flow on the membrane surface, resulting in improved fouling resistance and 3% higher removal of perfluorooctane sulfonate pollutants. While the antifouling performance of patterned TFC membranes has largely been confirmed through experiments [96][97][98][99][100][101][102][103][104][105] and numerical modeling, 101,105,106 certain studies have found that under specific conditions, the presence of patterns on the membrane surface can actually intensify concentration polarization. 107,108 Further research is needed to more comprehensively understand the impact of experimental parameters, including the cross-flow rate, the morphology and dimensions of the patterns, and the molecular properties of the solutes, on concentration polarization.…”

“…In our opinion, an interesting phenomenon of the crosslinking distinction of the polyamide at the top and valley regions of the patterned support and its underlying relationship with the pore structure and liquid wetting properties of the porous support needs further attention. 98,103 This not only influences the mechanical stability of the polyamide composite membranes but also might provide additional insight into synthesizing thin polyamide layers and tailoring their perm-selective performance.…”