A graft-modified cellulose acetate hollow fiber membrane

✍ Scribed by Yang Puchen; Yan Wen; Zhang Huixin

• Publisher: Elsevier Science
• Year: 1987
• Tongue: English
• Weight: 382 KB
• Volume: 62
• Category: Article
• ISSN: 0011-9164
• DOI: 10.1016/0011-9164(87)87011-x

✦ Synopsis

The irradiation-grafting (UV irradiation 254 nm) of styrene monomers onto asymmetric cellulose acetate hollow fiber (CAHF) membranes in water for RO was studied. With low concentration brine under 10 kgf/cm2 pressure the flux of the grafted membrane was 0.0528 cm3 x 10P3/cm2 s, which was higher than the flux of shrinking membranes (0.0150 cm3 x 10-3/cm2 s) . The salt rejection of the grafted membrane was 90.5%, close to that of the shrinking membrane and higher than that of raw membrane. The results of compaction experiments are reported. They show that UV-grafting improves the skin layer structure of the membranes and increases tensile creep of the copolymers, which in turn stabilizes the water flux and increases salt rejection.