Fig. 5: Polystyrene rejection profiles, comparison with other state-of-the-art membranes, and high-performance liquid chromatography (HPLC) analysis of API products (Acyclovir and Valacyclovir).
From: Ultrathin organosiloxane membrane for precision organic solvent nanofiltration
The rejection profiles of a 30 nm/XP6-D, b 29 nm/XP12-D, and c 35 nm/XP12-D membrane with different molecular weights of polystyrene oligomers in methanol, acetone, and DMF and their molecular weight cut-off (MWCO) for each solvent. d Trade-off relationship between methanol permeance and solute–solute selectivity and new upper bound with the MW range of 150–250 g mol−1 over 250–350 g mol−1. PIM and COF represent polymer of intrinsic microporosity and covalent organic framework, respectively. e Ultra-violet absorbance of API products (Acyclovir and Valacyclovir) was measured by HPLC at both and permeates of 29 nm/XP12-D, corresponding to retention time. All error bars indicate the standard deviation at two or three measurements.
