SEPARATION OF AQUEOUS ORGANIC SOLVENTS THROUGH CROSSLINKED POLY(ACRYLATE-co-ACRYLIC ACID) MEMBRANES BY PERVAPORATION

抄録

Pervaporation enrichment of chlorine containing organic hydrocarbons from dilute aqueous solution through poly (acrylate-co-acrylic acid) composite membranes with crosslinked structure was investigated. Five copolymers were synthesized and their membranes were prepared on a porous poly (propylene) sheet. These membranes have selectivity in favor of halogen containing hydrocarbons in addition to permeability, depending on side chains. The following acrylate monomers were used: butyl acrylate (BA), tert-butyl acrylate (tert-BA), lauryl methacrylate (LaMA), benzyl acrylate (BeA), cyclohexyl acrylate (CHA). Ratio of the acrylate monomer and acrylic acid was mostly 8.5/1.5 and 8.2/1.8. During the preparation of the membrane, crosslinking structure was introduced withN, N, N', N'-tetra glycidyl metaxylenediamine (TGXDA). Pervaporation was carried out for aqueous solutions of 1, 1, 2-trichloroethane (TCE), trichloroethylene and tetrachloroethylene using the copolymer membranes. Separation factor 500 of TCE/water and flux 24g/m². hr were obtained at 25°C, about 0.2wt.% aqueous feed composition for copoly (BA-acrylic acid) membrane.