Graphene oxide (GO)/multi‐walled carbon nanotubes (MWCNTs) modified nanofiltration (NF) membranes were successfully fabricated by interfacial polymerization of piperazine (PIP) and 1,3,5‐benzenetricarbonyl trichloride (TMC). Compared with the pristine polyamide (PA) membrane and GO membrane, the typical structure of the granular protrusions on the surface of the GO/MWCNTs membrane gradually disappeared, and a regular ordered morphology appeared. The membrane thickness and surface roughness were increased according to the results of field emission scanning electron microscopy (FE‐SEM) and atomic force microscopy (AFM). The contact angle of GO/MWCNTs NF membranes progressively decreased from 57° to 23°, indicating the enhancement of surface hydrophilicity. The best NF performance was achieved when the ratio of GO to MWCNTs was 6:3 (G‐M‐3). The water flux was 55.6 L/m².h, which was 33.7% higher than that of the GO membrane, and the rejection rate for Na₂SO₄ was maintained at approximately 94%. Both modified NF membranes could treat actual dyeing‐printing wastewater effectively. The anti‐fouling performance of G‐M‐3 was better than that of G3. Therefore, GO/MWCNTs‐modified NF membranes have a good application prospects in the field of wastewater treatment and water purification.

中文翻译：

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氧化石墨烯/多壁碳纳米管纳米复合聚酰胺纳滤膜用于印染废水处理

通过哌嗪（PIP）和1,3,5-苯三羰基三氯化物（TMC）的界面聚合，成功地制备了氧化石墨烯（GO）/多壁碳纳米管（MWCNT）改性的纳滤（NF）膜。与原始聚酰胺（PA）膜和GO膜相比，GO / MWCNTs膜表面的颗粒状突起的典型结构逐渐消失，并出现规则的有序形态。膜厚度和表面粗糙度根据场发射扫描电子显微镜（FE-SEM）和原子力显微镜（AFM）的结果而增加。GO / MWCNTs NF膜的接触角从57°逐渐减小到23°，表明表面亲水性增强。当GO与MWCNT的比例为6：3（G‐M‐3）时，可获得最佳的NF性能。² h，比GO膜高33.7％，Na ₂ SO ₄的排斥率保持在约94％。两种改性的NF膜均可有效处理实际的印染废水。G‐M‐3的防污性能优于G3。因此，GO / MWCNTs改性的NF膜在废水处理和水净化领域具有良好的应用前景。