Pilevar Mohsen, Jafarian Hesam, Behzadnia Nima, Liang Qiaoli, Aghapour Aktij Sadegh, Thakur Anupma, Gonzales Adriana Riveros, Arabi Shamsabadi Ahmad, Anasori Babak, Warsinger David, Rahimpour Ahmad, Sadrzadeh Mohtada, Elliott Mark, Dadashi Firouzjaei Mostafa
Department of Civil, Construction, and Environmental Engineering, University of Alabama, Tuscaloosa, AL, 35487, USA.
Department of Chemistry and Biochemistry, University of Alabama, Tuscaloosa, AL, 35487, USA.
Small Methods. 2025 Apr;9(4):e2401566. doi: 10.1002/smtd.202401566. Epub 2024 Nov 21.
Integrating biocidal nanoparticles (NPs) into polyamide (PA) membranes shows promise for enhancing resistance to biofouling. Incorporating techniques can tailor thin-film nanocomposite (TFN) membranes for specific water purification applications. In this study, silver-based metal-organic framework Ag-MOFs (using silver nitrate and 1,3,5-benzentricarboxylic acid as precursors) are incorporated into PA membranes via three different methods: i) incorporation, ii) dip-coating, and iii) in situ ultrasonic techniques. The characterizations, such as top-surface and cross-section scanning and transmission microscopy, reveal that the incorporation methods for the modified TFN membranes substantially control morphology and surface characteristics. For example, the in situ ultrasonically interlayered Ag-MOFs showed the largest pores (average pore diameter of 14 Å ± 0.1), resulting in the highest water permeance (water flux of 10.9 LMH/bar for NaSO). It also show superior antifouling and anti-biofouling performance, with a flux recovery ratio (FRR) of 94.1% in both fouling tests due to its improved surface hydrophilicity and the antibacterial properties of incorporated Ag-MOFs. Conversely, the surface-grafted dip-coated Ag-MOFs offered the highest salt rejection, attributed to its highly negatively charged surface and a dense PA network with narrow pores (average pore diameter of 10 Å ± 0.06).
将杀菌纳米颗粒（NPs）整合到聚酰胺（PA）膜中有望增强抗生物污染能力。采用的技术可定制用于特定水净化应用的薄膜纳米复合（TFN）膜。在本研究中，通过三种不同方法将银基金属有机框架Ag-MOFs（以硝酸银和1,3,5-苯三甲酸为前驱体）整合到PA膜中：i）掺入法，ii）浸涂法，以及iii）原位超声技术。诸如顶面和横截面扫描及透射显微镜等表征显示，改性TFN膜的掺入方法可显著控制形态和表面特性。例如，原位超声层间Ag-MOFs显示出最大的孔隙（平均孔径为14 ű0.1），从而实现了最高的水渗透率（NaSO的水通量为10.9 LMH/bar）。它还表现出优异的抗污染和抗生物污染性能，在两次污染测试中的通量恢复率（FRR）均为94.1%，这归因于其改善的表面亲水性以及掺入的Ag-MOFs的抗菌性能。相反，表面接枝浸涂的Ag-MOFs具有最高的盐截留率，这归因于其高度带负电的表面以及具有窄孔隙（平均孔径为10 ű0.06）的致密PA网络。
