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首页> 外文期刊>RSC Advances >Porous membranes designed from bi-phasic polymeric blends containing silver decorated reduced graphene oxide synthesized via a facile one-pot approach
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Porous membranes designed from bi-phasic polymeric blends containing silver decorated reduced graphene oxide synthesized via a facile one-pot approach

机译：由包含银的两相聚合物共混物设计的多孔膜，通过便捷的一锅法合成了经过修饰的氧化石墨烯

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In this work, porous membranes were designed by selectively etching the PEO phase, by water, from a melt-mixed PE/PEO blend. The pure water flux and the resistance across the membrane were systematically evaluated by employing an indigenously developed cross flow membrane setup. Both the phase morphology and the cross sectional morphology of the membranes was assessed by scanning electron microscopy and an attempt was made to correlate the observed morphology with the membrane performance. In order to design antibacterial membranes for water purification, partially reduced graphene oxide (rGO), silver nanoparticles (Ag) and silver nanoparticles decorated with rGO (rGO-Ag) were synthesized and incorporated directly into the blends during melt mixing. The loss of viability of bacterial cells was determined by the colony counting method using E. coli as a model bacterium. SEM images display that the direct contact with the rGO-Ag nanoparticles disrupts the cell membrane. In addition, the rGO-Ag nanoparticles exhibited a synergistic effect with respect to bacterial cell viability in comparison to both rGO and Ag nanoparticles. The possible mechanism associated with the antibacterial activity in the membranes was discussed. This study opens new avenues in designing antibacterial membranes for water purification.
机译：在这项工作中，通过用水从熔融混合的PE / PEO混合物中选择性蚀刻PEO相来设计多孔膜。通过采用本地开发的错流膜设置系统地评估了纯水通量和跨膜的阻力。通过扫描电子显微镜评估膜的相形态和横截面形态，并尝试将观察到的形态与膜性能相关联。为了设计用于水净化的抗菌膜，合成了部分还原的氧化石墨烯（rGO），银纳米颗粒（Ag）和装饰有rGO的银纳米颗粒（rGO-Ag），并在熔融混合过程中将其直接掺入共混物中。使用大肠杆菌作为模型细菌，通过菌落计数法确定细菌细胞的活力丧失。 SEM图像显示与rGO-Ag纳米颗粒的直接接触破坏了细胞膜。另外，与rGO和Ag纳米颗粒相比，rGO-Ag纳米颗粒在细菌细胞生存力方面表现出协同作用。讨论了与膜中抗菌活性有关的可能机理。这项研究为设计用于水净化的抗菌膜开辟了新途径。

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