中文摘要：当缺乏水和电力集中系统时，用低压差下显示高通量的正电性膜分离病毒和其他带电实体前景很好。然而，制备具有最佳静电特性、稳定性好的膜仍然不易。本文将氢化爆震纳米金刚石加载到石英微纤维支撑膜上，并在高真空退火过程中耦合到膜表面。制备的膜在pH7时的zeta电位为+45 mV，在pH11附近有一个等电点。通过长期广泛的zeta电位测量，证明了纳米金刚石涂层对加压水流具有长期稳定性；水过滤试验表明制备的膜对电负性染料分子酸性黑2具有良好的保留能力，并且使试验水中MS2噬菌体至少减少了6.2 log(10)。
外文摘要：Electropositive membranes demonstrating high flux at low pressure differentials show great promise as universal separation platforms for viruses and other charged entities when centralized systems of water and power are scarce. However, the fabrication of a suitably stable membrane with optimal electrostatic characteristics remains a challenge. Here, hydrogenated detonation nanodiamond was loaded onto a quartz microfiber support membrane and coupled to the membrane surface under a high vacuum annealing process. The fabricated membranes display a zeta potential of +45 mV at pH 7 and an isoelectric point around pH 11. We show that the nanodiamond coating is robust to prolonged periods of pressurized water flow by performing extensive zeta potential measurements over time, and water filtration tests demonstrated excellent membrane retention for the electronegative dye molecule acid black 2, and at least a 6.2 log(10) reduction in MS2 bacteriophage from feed waters (>99.9999%).
外文关键词：nanodiamond；zeta potential；water filtration；virus filtration；electropositive membrane
作者：Bland, HA；Centeleghe, IA；Mandal, S；Thomas, ELH；Maillard, JY；Williams, OA
作者单位：Cardiff Univ
期刊名称：ACS APPLIED NANO MATERIALS
期刊影响因子：0.0
出版年份：2021
出版刊次：3
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