通过银纳米粒子-氧化石墨烯杂化纳米片改性聚偏二氟乙烯膜以有效减轻膜生物污染。
Modification of polyvinylidene fluoride membrane by silver nanoparticles-graphene oxide hybrid nanosheet for effective membrane biofouling mitigation.
机构信息
Department of Civil and Environmental Engineering, National University of Singapore, 10 Kent Ridge Crescent, Singapore, 119260, Singapore; NUS Environmental Research Institute, National University of Singapore, 5A Engineering Drive 1, #02-01, Singapore, 117411, Singapore; Guangdong Key Laboratory of Environmental Pollution and Health, School of Environment, Jinan University, Guangzhou, 511443, China.
NUS Environmental Research Institute, National University of Singapore, 5A Engineering Drive 1, #02-01, Singapore, 117411, Singapore.
出版信息
Chemosphere. 2021 Apr;268:129187. doi: 10.1016/j.chemosphere.2020.129187. Epub 2020 Dec 3.
Membrane biofouling poses severe impacts on the membrane lifespan and performance. In this study, a silver nanoparticles-graphene oxide hybrid nanosheet (AgNPs-GO) was synthesized as a bactericidal agent for effective membrane biofouling mitigation. The surface polymerization between polyvinyl alcohol (PVA) and AgNPs-GO nanosheet improved the stability of inorganic biocidal materials on the membrane surface and had a significant effect on the permeability and rejection performance of membranes. The PVA/AgNPs-GO modified hydrophilic polyvinylidene fluoride (H-PVDF) membrane exhibited an excellent anti-microbial activity in both static contact and filtration modes; nearly 100% inactivation of Pseudomonas aeruginosa in solution and 91% reduction in the membrane surface adhesion were found. The composite membrane with good stability and anti-microbial ability may offer an alternative to alleviate membrane biofouling problem.
膜生物污染对膜的寿命和性能造成严重影响。在这项研究中，合成了一种银纳米粒子-氧化石墨烯杂化纳米片（AgNPs-GO）作为杀菌剂，以有效减轻膜生物污染。聚乙烯醇（PVA）和 AgNPs-GO 纳米片之间的表面聚合提高了膜表面无机杀菌材料的稳定性，对膜的渗透性和截留性能有显著影响。PVA/AgNPs-GO 改性亲水性聚偏氟乙烯（H-PVDF）膜在静态接触和过滤模式下均表现出优异的抗菌活性；在溶液中几乎可实现铜绿假单胞菌 100%失活，在膜表面黏附物减少 91%。具有良好稳定性和抗菌能力的复合膜可作为缓解膜生物污染问题的一种选择。
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