Abstract
Polydimethylsiloxane (PDMS) pervaporation (PV) membranes are promising for the recovery of aromatic compounds in water. The novel oleyl alcohol-modified PDMS membranes were prepared using n-heptane as solvent, tetraethyl orthosilicate (TEOS) as crosslinker, di-n-butyltin dilaurate (DBTL) as catalyst and oleyl alcohol as organic modifier. The PV performances were investigated for separating phenol/water mixtures at different temperatures. The results showed that the oleyl alcohol-modified PDMS membranes had better selectivity than those without oleyl alcohol. For 0.50 wt% phenol in feed mixture at 80 °C, these membranes had a flux of 0.115 kg m-2 h-1 and separation factor of 8.77.
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