Pervaporation separation of ethanol-water mixtures using grafted poly(acrylic acid)-nylon 6 membranes

✍ Scribed by R.Y.M. Huang; Y.F. Xu

• Publisher: Elsevier Science
• Year: 1988
• Tongue: English
• Weight: 357 KB
• Volume: 24
• Category: Article
• ISSN: 0014-3057
• DOI: 10.1016/0014-3057(88)90172-3

✦ Synopsis

Gamma-ray induced grafted poly(acrylic acid) (PAA)-Nylon-6 membranes were prepared and tested for the pervaporation separation of ethanol-water mixtures. Two methods were used for the pervaporation of the grafted membranes. In method-l, the substrate was first crosslinked and then irradiated in aqueous solutions containing acrylic acid and 0.04 M cupric sulphate. In method-2, the substrate was first irradiated in the grafting solution and then crosslinked in 10 weight % aqueous Al(NO3)3.9H20 solution. The best results were obtained from graft copolymer membranes with PAA content between 15 and 20 weight %, which gave separation factors ranging from 10-25 and permeation rates of 30-250 g/m 2 hr. The effects of monomer concentration and the radiation dose on the percent grafting as well as the effects of feed composition on the separation factors and the permeation rates have also been investigated.