Pervaporation separation of binary organic-aqueous liquid mixtures using crosslinked PVA membranes. I. Characterization of the reaction between PVA and PAA

✍ Scribed by Ji-Won Rhim; Min-Young Sohn; Hyeok-Jong Joo; Kew-Ho Lee

• Publisher: John Wiley and Sons
• Year: 1993
• Tongue: English
• Weight: 399 KB
• Volume: 50
• Category: Article
• ISSN: 0021-8995
• DOI: 10.1002/app.1993.070500413

✦ Synopsis

For the purposes of the water-selective membrane material development for pervaporation separation, poly (vinyl alcohol) (PVA) was crosslinked with a low molecular weight of poly (acrylic acid) ( PAA) . The crosslinking reactions between PVA and PAA were characterized through IR spectroscopy, differential scanning calorimetry ( DSC ), and tensile tests when varying the reaction conditions, that is, time, temperature, amounts of crosslinking agents, PAA. It was found that the crosslinking reaction was fast: in other words, that the reaction mainly occurred at the initial step of each reaction condition. The best reaction conditions for preparing the crosslinked PVA membranes were found to be: reaction time not over 1 h, reaction temperature in the range of 15O-18O0C. PAA contents of 15-20 wt % were found satisfactory with respect to the application areas.