“…The Hildebrand solubility parameters for methanol, ethanol, isopropanol, and 1-butanol are 29.6, 26.2, 23.6, and 23.3 MPa 0.5 , respectively. ,, 1-Butanol exhibits relatively closer compatibility with PDMS (14.9 MPa 0.5 ), leading to a stronger affinity for PDMS . Second, the molecular dynamics radius of methanol, ethanol, isopropanol, and 1-butanol are 0.195, 0.225, 0.235, and 0.25 nm, respectively. ,,− The molecular kinetic radius gradually approaches the r 3 of ME-PDMS. Once bulkier molecules diffuse through the network cavity, the water endures a greater transport resistance coupled with the high hydrophobicity of the ME-PDMS membrane itself, leading to a decrease in water flux and an increase in alcohol flux.…”