表面化学法改性醋酸纤维素微滤膜

Modification of Microporous Cellulose Acetate Membrane with Anionic Polyacrylamide by Chemical Surface-grafted Method

通过表面化学法将阴离子聚丙烯酰胺接枝到醋酸纤维素微滤膜上,得到聚电解质改性膜。实验研究了阴离子聚丙烯酰胺质量分数、交联剂质量分数、交联反应温度和反应时间对接枝率、改性膜的水通量和截留率的影响。结果表明,聚电解质质量分数越高、交联剂质量分数越大、反应时间越长、反应温度越高,膜的水通量越低而截留率越高。

The cellulose acetate （CA） microporous membranes were modified by chemical surface-grafted method with anionic polyacrylamide. The effects of concentration of anionic polyacrylamide and crosslinking agent,reaction time and temperature on grafting yield and the flux and rejection of grafted membrane were investigated. The results show that tion increased with increasing concentration of the flux of modified membranes decreased while the rejec- anionic polyacrylamide and cross-linking agent,extending reaction time,raising reaction temperature.