College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, China.
College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, China.
J Colloid Interface Sci. 2019 Nov 15;556:492-502. doi: 10.1016/j.jcis.2019.08.062. Epub 2019 Aug 17.
Given the complexity of pollutants in wastewater, development of facile and effective multifunctional materials, which can not only kill bacteria but also remove dyes from wastewater, is in high demand. Herein, a facile strategy for the preparation of positively-charged nanofibrous membranes (NFMs) is reported via the combination of electrospinning and in-situ cross-linked polymerization of poly ([2-(methacryloyloxy)-ethyl] trimethyl ammonium chloride) (PMETAC) in poly (ether sulfone) (PES) solution. The quaternary ammonium salt polymer of PMETAC enabled the NFMs with positive charge to kill bacteria and remove anionic dyes. The antibacterial tests including agar plate counting and live/dead staining indicate that the NFMs show strong antibacterial ability with bacterial killing ratios of nearly 99% for both Escherichia coli and Staphylococcus aureus, as well as remarkable recyclability towards killing bacteria. The dyes adsorption experiments show that the NFMs exhibit high adsorption capacity for anionic dyes up to 208 mg g for Congo Red (CR) and good reusability toward CR. Impressively, the membrane adsorption column test indicates that the CR dye removal ratio is up to 100% for the first time, and that is still as high as 96.5% for the third time with a fresh dye solution. Given the above advantages, such fascinating NFMs may provide new perspectives in the exploitation of multifunctional membrane materials for complex water remediation.
鉴于废水中污染物的复杂性，开发简便有效的多功能材料是非常需要的，这种材料不仅可以杀菌，还可以去除废水中的染料。本文报道了一种简便的制备带正电荷纳米纤维膜（NFMs）的策略，该策略通过静电纺丝和聚[2-（甲基丙烯酰氧基）乙基]三甲基氯化铵（PMETAC）在聚醚砜（PES）溶液中的原位交联聚合相结合来实现。PMETAC 的季铵盐聚合物使 NFMs 带正电荷，从而具有杀菌和去除阴离子染料的能力。包括琼脂平板计数和死活染色的抗菌测试表明，NFMs 表现出很强的抗菌能力，对大肠杆菌和金黄色葡萄球菌的杀菌率接近 99%，并且对杀菌具有显著的可循环性。染料吸附实验表明，NFMs 对阴离子染料刚果红（CR）的吸附容量高达 208mg/g，对 CR 具有良好的可重复使用性。令人印象深刻的是，膜吸附柱测试表明，NFMs 首次对 CR 染料的去除率达到 100%，第三次使用新鲜染料溶液时仍高达 96.5%。鉴于上述优点，这种引人注目的 NFMs 可能为开发用于复杂水修复的多功能膜材料提供新的视角。
