Abstract
Secondary cellulose acetate was chemically modified by introducing
O-(carboxy-methyl),
O-nitro, and
O-(cyanoethyl) groups, and then tested for semipermeability. Introducin
O-(cyanoethyl) groups (0.1–0.68 cyanoethyl group per C
6 unit) gave an elastic film that was tougher and of better desalination characteristics than the standard cellulose acetate membrane.