摘要
为了研究空气中等离子体改性对聚砜(PSF)超滤膜性能的影响,通过辉光放电空气等离子体对聚砜膜进行表面改性,采用亲水接触角法评价了改性条件对聚砜膜表面性质的影响规律.采用牛血清蛋白溶液作为类蛋白污染物进行试验,评价了改性前后聚砜膜的渗透性、污染率、恢复率等性能.结果表明,聚砜膜表面经等离子体处理后,表面润湿性发生变化,在最佳表面改性条件(放电功率8W,放电时间30s)下,膜表面的水接触角从69°下降到20°.改性后的聚砜膜渗透性能提高,抗污染性能得到了明显改善.
In order to understand the effect of modified polysulfone（PSF）ultrafiltration membrane in air atmosphere,polysulfone membrane surface is modified by glow discharge air plasma.The impact regularity of modification on PSF surface properties was appraised with the water contact angle measurement.Antifouling experiment was carried out with bovine serum albumin used as proteinlike substances.Properties of PSF such as permeability,contamination rate and flux recovery rate were evaluated.Results show that wettability of modified PSF surface is altered.When the optimal discharge power is 8W and the optimum processing time is 30 s,the water contact angle decreases from 69°to 20°.And the antifouling property is obviously improved.
出处
《西安工程大学学报》
CAS
2015年第1期32-36,共5页
Journal of Xi’an Polytechnic University
基金
国家自然科学基金资助项目(11105102)
关键词
辉光放电
空气等离子体
膜改性
聚砜膜
glow discharge
air plasma
membrane modification
polysulfone membrane
