This paper describes the removal of benzene from an aqueous solution of dilute benzene using the poly(methyl methacrylate)-graft-poly(dimethylsiloxane) (PMMA- g -PDMS) membranes containing tert -butylcalix[4]arene (CA) (CA/PMMA- g -PDMS) by pervaporation. When an aqueous solution of 0.05 wt % benzene was permeated through the CA/PMMA- g -PDMS membranes, they showed strong benzene permselectivity. Both the permeability and the benzene permselectivity of the CA/PMMA- g -PDMS membranes were enhanced by increasing the CA content because the affinity of the CA/PMMA- g -PDMS membranes for benzene was increased by introducing CA into the membranes. Transmission electron microscope observations revealed that the CA/PMMA- g -PDMS membranes had a microphase- separated structure consisting of a PMMA phase and a PDMS phase containing CA. An examination of the permeation mechanism led us to the conclusion that the CA in the microphase-separated structure plays an important role as a carrier to selectively partition benzene from the aqueous solution.
No takes yet. Share an insight, caveat, or question.
Uragami et al. (2001) studied this question.
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context: