【摘要】 用热重分析、机械强度分析和接触角测定对亲水改性后的聚偏氟乙烯膜进行了表面性能表征.利用改性膜对油浓度小于200mg/L的含油废水进行了分离,研究了改性膜对油的截流效果.结果表明,与聚偏氟乙烯膜相比,改性膜的热稳定性和机械强度均有所提高.改性膜的水接触角减小到35°以下,清水通量增加到115L/m2.h以上,油截留率大于85%,皆显著优于聚偏氟乙烯膜.更多还原

【Abstract】 The gravitational thermal analysis,machine intensity analysis and contact angle determination were employed to characterize the performance of Polyvinylidene Fluoride membrane after hydrophilic modification.At 0.2MPa,the modified membrane was applied to separate the oily wastewater which oil concentration was lower than 200mg/L,and oil rejection effect of modified membrane was studied.The results show that the thermal stability and machine intensity were improved compared to Polyvinylidene Fluoride membrane.After modification,water contant angle was minished to 35°,pure water flux is over 115L/m2·h,and oil rejection ratio was higher than 85%.The performance of modified membrane is better than that of Polyvinylidene Fluoride membrane.更多还原