College of Biomass Science and Engineering, Sichuan University, Chengdu 610065, China.
Research Center for Fiber Science and Engineering Technology, Yibin Institute of Industrial Technology/Sichuan University, Yibin Park, Yibin 64460, China.
ACS Appl Mater Interfaces. 2022 Aug 24;14(33):38358-38369. doi: 10.1021/acsami.2c09963. Epub 2022 Aug 11.
Through etherification reaction, epoxy propyl dimethyl dodecyl ammonium chloride (EPDMDAC) was grafted onto the surface of a cellulose acetate (CA) membrane to prepare a stable nonleaching antibacterial antifouling membrane (QCA-). The results showed that with the extension of grafting reaction time, the quaternary ammonium salt groups on the membrane surface increased and the hydrophilicity was enhanced. Compared with those of the CA membrane, the filtration capacity and antifouling performance of the QCA- membrane are improved. When the grafting time is 4 h, the water permeability and flux recovery rate of the QCA-4 membrane are increased by 139 and 21.5%, respectively. The QCA- membrane showed excellent antibacterial performance, and the sterilization rate against and was more than 99.99%. After four repeated antibacterial cycles, the bactericidal rates against and were maintained at about 99.69 ± 0.02 and 99.98 ± 0.02%, respectively, with good antibacterial persistence. Moreover, the QCA- membrane can effectively inhibit bacterial adhesion. Mild and simple EPDMDAC grafting modifications improve the antibacterial, antifouling, and antibioadhesion properties of the CA membrane, showing its application potential in long-term water treatment, especially in biofouling water treatment.
通过醚化反应，将环氧丙基二甲十二烷基氯化铵（EPDMDAC）接枝到醋酸纤维素（CA）膜表面，制备了一种稳定的非浸出型抗菌抗污染膜（QCA-）。结果表明，随着接枝反应时间的延长，膜表面的季铵盐基团增加，亲水性增强。与 CA 膜相比，QCA-膜的过滤能力和抗污染性能得到提高。当接枝时间为 4 h 时，QCA-4 膜的水通量和通量恢复率分别提高了 139%和 21.5%。QCA-膜表现出优异的抗菌性能，对 和 的杀菌率均超过 99.99%。经过四次重复抗菌循环后，对 和 的杀菌率分别保持在约 99.69±0.02%和 99.98±0.02%，具有良好的抗菌持久性。此外，QCA-膜能有效抑制细菌黏附。温和简单的 EPDMDAC 接枝改性提高了 CA 膜的抗菌、抗污染和抗生物黏附性能，显示出其在长期水处理，特别是在生物污染水处理方面的应用潜力。
