The Education Ministry Key Laboratory of Resource Chemistry and Shanghai Key Laboratory of Rare Earth Functional Materials, Department of Chemistry and Chemical Engineering, Shanghai Normal University, 100 Guilin Road, Shanghai 200234, China.
College of Life and Environment Sciences, Shanghai Normal University, 100 Guilin Road, Shanghai 200234, China.
J Colloid Interface Sci. 2017 Nov 1;505:38-48. doi: 10.1016/j.jcis.2017.05.076. Epub 2017 May 24.
Novel ultrafiltration membranes with both superior antibacterial and self-cleaning properties were fabricated. By using a non-solvent induced phase separation method (NIPS), N-halamine epoxide and siloxane were grafted onto the multi-walled carbon nanotubes (N-Si-MWNTs) to fabricate polyvinylidene fluoride (PVDF) hybrid membranes. The membrane morphology was observed under a field emission scanning electron microscopy. The results demonstrated that the PVDF hybrid membranes had an asymmetrical structure, and their hydraulic permeability was evidently enhanced with the addition of modified MWNTs. When compared with the primitive PVDF membrane, the hybrid membranes presented improved surface hydrophilicity. After three ultrafiltration-regeneration cycles with bovine serum albumin as model biofoulant and pure water as detergent, the PVDF hybrid membranes exhibited a high flux recovery ratio (FRR). Furthermore, when compared with other membranes, the membrane containing N-Si-MWNTs displayed the highest FRR value of above 96.5% after the entire fouling and cleaning experiment. The fabricated PVDF/N-Si-MWNTs hybrid membranes had excellent antibacterial efficacy, presenting maximum antibacterial efficacy of 98.0% and 95.6% against Staphylococcus aureus and Escherichia coli, respectively. Thus, the PVDF/N-Si-MWNTs membranes fabricated in this study are environment-friendly with both benign antibacterial and self-cleaning properties.
制备了具有优异抗菌和自清洁性能的新型超滤膜。通过非溶剂致相分离法（NIPS），将 N-卤胺环氧化物和硅氧烷接枝到多壁碳纳米管（N-Si-MWNTs）上，制备了聚偏二氟乙烯（PVDF）杂化膜。用场发射扫描电子显微镜观察了膜的形态。结果表明，PVDF 杂化膜具有不对称结构，随着改性 MWNTs 的加入，其水力渗透性明显提高。与原始的 PVDF 膜相比，杂化膜的表面亲水性得到了改善。以牛血清白蛋白为模型生物污染物，纯水为洗涤剂，进行三次超滤-再生循环后，PVDF 杂化膜的通量恢复率（FRR）较高。此外，与其他膜相比，在整个污染和清洗实验后，含有 N-Si-MWNTs 的膜的 FRR 值最高，超过 96.5%。所制备的 PVDF/N-Si-MWNTs 杂化膜具有优异的抗菌性能，对金黄色葡萄球菌和大肠杆菌的最大抗菌效率分别为 98.0%和 95.6%。因此，本研究制备的 PVDF/N-Si-MWNTs 膜具有环境友好性，具有良好的抗菌和自清洁性能。
