Concurrent filtration and inactivation of bacteria using poly(vinyl alcohol-co-ethylene) nanofibrous membrane facilely modified using chitosan and graphene oxide
Concurrent filtration and inactivation of bacteria using poly(vinyl alcohol-co-ethylene) nanofibrous membrane facilely modified using chitosan and graphene oxide
复制标题
使用壳聚糖和氧化石墨烯轻松修饰的聚（乙烯醇-共-乙烯）纳米纤维膜同时过滤和灭活细菌
DOI：
10.1039/c6en00364h
复制
发表时间：
2017-02
影响因子：
7.3
通讯作者：
Wang Dong
中科院分区：
文献类型：
--
作者：
Liu Ke;Cheng Pan;Wang Yuan;Zhong Weibing;Lu Zhentan;Li Mufang;Liu Qiongzhen;Wang Wenwen;Zhu Qing;Wang Dong
将多种具有抗菌性能的纳米级组件集成到单个膜过滤器中对于水处理的高效应用是必不可少的。本文采用熔融相分离法制备了壳聚糖（CS）和氧化石墨烯（GO）修饰的聚乙烯醇-乙烯共聚物（PVA-co-PE）纳米纤维膜（NFM）。如形态和结构分析所示，CS和GO在整个PVA-co-PE层中与纳米纤维的表面具有紧密的物理附着，具有减小的孔径和接触角。与商用PVDF膜相比，NFM膜的厚度较小，堆积密度较高，对色素纳米颗粒和细菌细胞的留存率较高，水通量较高且稳定。通过使用NFM也提高了细菌灭活的性能。特别是CS/GO改性后，膜对大肠杆菌的灭活率提高到97.8-99.5%。coli和革兰氏阳性菌S.具有上级重复使用性能。这些结果可归因于纳米纤维网络对PVA-co-PE中的羟基、壳聚糖中的NH3+以及氧化石墨烯的二维结构的增强作用。本发明的膜在长期高效稳定的水处理中具有很大的应用潜力。
Integrating multiple nanoscale components with antibacterial properties into a single membrane filter is indispensable for efficient application in water treatment. Herein, we prepare a poly(vinyl alcohol-co-ethylene) (PVA-co-PE) nanofibrous membrane (NFM) decorated using chitosan (CS) and graphene oxide (GO), via a melt-phase-separated nanofiber/CS-GO suspension coating technique. As indicated by morphology and structure analysis, CS and GO have tight physical attachment to the surface of the nanofibers throughout the PVA-co-PE layer, with diminished pore size and contact angle. Compared to commercial PVDF membrane, NFMs exhibit enhanced retention rate of pigmented nanoparticles and bacterial cells and higher and more stable water flux due to their relatively small thickness and high stacking density. The performance for inactivation of bacteria is also improved by employing NFM. Particularly after CS/GO modification, the inactivation rate of the membrane is increased to the range of 97.8–99.5% against E. coli and S. aureus with superior repetitive-use performance. These results can be attributed to the enhancement effect of the nanofiber network on the activity of the hydroxyl groups in PVA-co-PE, NH3+ in chitosan and the 2D structure of graphene oxide. The present membranes have much potential for use in long-term water treatment with high efficiency and stability.
登录
查看更多内容
影响因子：
1.3
作者：
Maria C. Militello;S. Gaarenstroom
通讯作者：
Maria C. Militello;S. Gaarenstroom
影响因子：
9.5
作者：
Ghosh, Asim K.;Hoek, Eric M. V.
通讯作者：
Hoek, Eric M. V.
影响因子：
6.2
作者：
Pakravan, Mehdi;Heuzey, Marie-Claude;Ajji, Abdellah
通讯作者：
Ajji, Abdellah
影响因子：
9.9
作者：
Hilal, N;Kochkodan, V;Levadna, T
通讯作者：
Levadna, T
影响因子：
11.4
作者：
Ngai Yin Yip;M. Elimelech
通讯作者：
Ngai Yin Yip;M. Elimelech