Herein, a composite membrane was synthesized by adding β-cyclodextrin modified Fe₃O₄/GO (β-MGO) to polyvinylidene fluoride (PVDF), in the presence or absence of magnetic field via the combination of magnetic field induction and phase conversion techniques. FT-IR, Raman, XRD, TEM, XPS and hysteresis loop results indicate β-MGO was synthesized successfully. By analyzing the characterization results of the membrane, β-MGO can be adsorbed onto the surface of the membrane under magnetic field (M-β-MGO) conditions. The changes of pure water flux, BSA rejection, hydrophilicity, porosity, pore size and anti-pollution performance of M-β-MGO and β-MGO membrane were discussed with the content of β-MGO. The M-β-MGO membrane shows the best performance when the β-MGO content is 0.7%. In addition, our experimental results on the removal of heavy metal Cu²⁺ show that after five cycles, the rejection rate and adsorption capacity of Cu²⁺ are still as high as 75% and 0.94 mg/g. Meanwhile, it is find that pH > 6 can significantly increase the removal rate of Cu²⁺, and the membrane is suitable for removing Cu²⁺ concentrations below 30 mg/L. Therefore, this study presents a novel strategy for developing high-performance hybrid membranes via manipulating the migration of nanomaterials to the membrane surface.

中文翻译：

---

β-环糊精改性/ PVDF共混磁性膜在直接去除废水中金属离子中的应用

在此，通过在磁场存在或不存在的情况下，通过磁场感应和相变技术的组合，在聚偏二氟乙烯（PVDF）中添加β-环糊精修饰的Fe ₃ O ₄ / GO（β- MGO）到聚偏二氟乙烯（PVDF）中来合成复合膜。。FT-IR，拉曼光谱，XRD，TEM，XPS和磁滞回线结果表明成功合成了β- MGO。通过分析膜的表征结果，可以在磁场（M- β- MGO）条件下将β- MGO吸附到膜表面上。M- β的纯水通量，BSA截留率，亲水性，孔隙率，孔径和抗污染性能的变化-MgO和β -MgO用的内容进行了讨论膜β -MgO。当β- MGO含量为0.7％时，M- β- MGO膜表现出最佳性能。此外，我们的对去除重金属铜的实验结果²⁺表明五个周期，Cu的拒绝率和吸附容量后²⁺仍高达75％和0.94毫克/克。同时，发现pH> 6可以显着提高Cu ²⁺的去除率，并且该膜适合去除Cu ²⁺浓度低于30 mg / L。因此，本研究提出了通过控制纳米材料向膜表面的迁移来开发高性能混合膜的新策略。