Internal Concentration Polarization in the Polyamide Active Layer of Thin-Film Composite Membranes

• Published in: Environmental science & technology Vol. 57; no. 14; pp. 5999 - 6007
• Main Authors: Zhou, Zongyao, Wang, Qun, Qin, Yiwen, Hu, Yunxia
• Format: Journal Article
• Language: English
• Published: United States American Chemical Society 11.04.2023
• Subjects: Cavities; Crusts; environmental science; Film thickness; Membrane separation; Membranes; Membranes, Artificial; Nylons - chemistry; Osmosis; Parameters; Physico-Chemical Treatment and Resource Recovery; Polarization; Polyamide resins; Polyamides; Polysulfone; Polysulfone resins; technology; thin film composite membranes; Thin films; Water - chemistry; Water Purification - methods; forward osmosis; polyamide film; water treatment; TFC membrane; internal concentration polarization

A free-standing polyamide (PA) film is fabricated via in situ release from a thin-film composite (TFC) membrane achieved through the removal of the polysulfone support. The structure parameter S of the PA film is measured to be 24.2 ± 12.6 μm, which is about 87-fold of its film thickness. A signific...