Tubular interpolymer ion-exchange membranes. Donnan dialysis through strong-base membranes

摘要: Abstract Strong-base tubular membranes prepared from the system polyethylene/poly (styrene-co-divinylbenzene)[PE/poly(St-co-DVB)] were tested in a Donnan dialysis process. The had various amounts of DVB—0.5, 2 and 10 wt.%—in aromatic component polymeric material types functional groups—trimethylamine (TMA), triethylamine (TEA), dimethylaminoethanol (DMAE) diethylaminoethanol (DEAE). Transport properties examined 0.01 M HCl ¦membrane¦ 1 NaOH to determine OH− ion interdiffusion coefficient, rate dialysate deacidification flux Na + ions temperature range 25–55°C. It was found that efficiency depended on type molar concentration groups DVB content. best results, i.e., reasonable with low co-ion concentrated dilute solution, obtained at 35°C for membrane TMA 2% DVB.