【摘要】 以相对分子质量67 000的牛血清蛋白(BSA)为分离对象,通过膜通量、截留率、膜通量衰减程度和恢复率等膜参数的测定,考察了外加直流电场作用陶瓷膜(γ-Al2O3)的分离性能。结果表明,外加正电场陶瓷膜的膜通量和截留率都有所提高,20 V/cm时,分别提高了67%和46.8%,而膜通量衰减程度由84.64%降低到60.87%,经过"电场自净"的陶瓷膜,其膜通量的恢复率可达95%以上,能较大改善膜的抗污染性能。更多还原

【Abstract】 The performance of γ-Al2O3membrane under an external electric field,including flux,retention rate,declines and recovery of the performance,was investigated by the ultrafiltration of BSA.The results showed that both flux and retention rate of γ-Al2O3 membrane increased under external positive electric fields of 20 V/cm by 67% and 46.8%,respectively.The flux decline decreased from 84.64% to 60.87% and the flux recovery rate was higher than 95% by "self-cleaning electric fields".Therefore,the anti-fouling property of ceramic membrane can be greatly improved by an electric field.更多还原