polyamide (pa) nf membranes  (Technical Manufacturing Company)

Journal: Nature Communications

Article Title: Regulation of molecular transport in polymer membranes with voltage-controlled pore size at the angstrom scale

doi: 10.1038/s41467-023-38114-3

Figure Lengend Snippet: a Schematic illustration of nanofiltration using CNTs-PA membrane as the cathode. b PEG rejections as function of molecular weight by the CNTs-PA membrane and corresponding MWCO at different applied voltages in the presence of 1000 ppm Na 2 SO 4 . c Pore radius of CNTs-PA membrane as a function of applied voltage in the presence of 1000 ppm Na 2 SO 4 . d Pore radius of CNTs-PA membrane as a function of Na 2 SO 4 concentration at an applied voltage of 1.0 V. e Reversible change of pore radius of the CNTs-PA membrane when applied voltage switches between 0 and 1.0 V. f Demonstration of operando regulation of dye separation performance via adjusting the voltage applied on the CNTs-PA membrane. For c – e , the pore radii are estimated using the hinder transport model with rejections of PEG of different molecular weights as the inputs. Error bar represents the standard deviation of three replicate measurements. Source data are provided as a Source Data file.

Article Snippet: Thin-film composite polyamide (TFC-PA) nanofiltration (NF) membrane was fabricated by interfacial polymerization with piperazine (PIP) and 1,3,5-trimesoyl chloride (TMC) on the rough surface of a network of hydroxyl-functionalized multiwalled carbon nanotubes (referred to as CNTs) (Supplementary Fig. ).

Techniques: Membrane, Molecular Weight, Concentration Assay, Operando Spectroscopy, Standard Deviation