Fouling is one of the drawbacks in membrane filtration systems, reducing the water quality and decreasing the lifespan of a membrane filtration system. In this study, we propose a surface modification on polyethersulfone (PES) membrane by using plasma polymerization with heptylamine as the precursor by varying the deposition time from 3 to 15 min to induce hydrophilic surface of the membrane without changing the bulk properties of PES membrane. Cross-flow filtration and water contact angle of the PES membrane were used to measure permeate flux and Congo red rejection. Based on permeate flux, we calculate the fouling tendencies of each membrane and the result showed that sample with 5-min deposition time produces the best permeate flux (58% increase) and the lowest fouling tendencies (65% decrease) when compared to the untreated membrane. From the EDX mapping, the deposition enables to introduce a stable nitrogen element into the membrane with the homogeneous distribution. This plasma-based post-surface modification demonstrates the encouraging potential to improve significantly the permeate flux, rejection and fouling properties compared to the untreated commercial filtration membrane.

结垢是膜过滤系统的缺点之一，会降低水质并缩短膜过滤系统的使用寿命。在这项研究中，我们提出了通过使用以庚胺为前体的等离子体聚合，通过改变沉积时间（从3分钟到15分钟）以诱导膜的亲水表面而不改变PES膜的整体性能，来在聚醚砜（PES）膜上进行表面改性。用PES膜的错流过滤和水接触角测量渗透通量和刚果红截留率。根据渗透通量，我们计算了每个膜的结垢趋势，结果表明，与未处理的样品相比，沉积时间为5分钟的样品产生的渗透通量最好（增加58％），结垢趋势最低（减少65％）。膜。根据EDX映射，沉积能够将稳定的氮元素以均匀的分布引入膜中。与未经处理的商用滤膜相比，这种基于等离子体的表面后修饰显示出令人鼓舞的潜力，可以显着提高渗透通量，截留率和结垢性能。