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Preparation and characterization of novel alkali-resistant nanofiltration membranes with enhanced permeation and antifouling properties: the effects of functionalized graphene nanosheets†
RSC Advances ( IF 3.9 ) Pub Date : 2017-03-29 00:00:00 , DOI: 10.1039/c7ra00928c Quanling Xie 1, 2, 3, 4, 5 , Shishen Zhang 5, 6, 7, 8, 9 , Zongyuan Xiao 3, 4, 5, 9, 10 , Xiangfeng Hu 3, 4, 5, 9, 10 , Zhuan Hong 5, 6, 7, 8, 9 , Ruizao Yi 5, 6, 7, 8, 9 , Wenyao Shao 3, 4, 5, 9, 10 , Qiuquan Wang 1, 2, 3, 4, 5
RSC Advances ( IF 3.9 ) Pub Date : 2017-03-29 00:00:00 , DOI: 10.1039/c7ra00928c Quanling Xie 1, 2, 3, 4, 5 , Shishen Zhang 5, 6, 7, 8, 9 , Zongyuan Xiao 3, 4, 5, 9, 10 , Xiangfeng Hu 3, 4, 5, 9, 10 , Zhuan Hong 5, 6, 7, 8, 9 , Ruizao Yi 5, 6, 7, 8, 9 , Wenyao Shao 3, 4, 5, 9, 10 , Qiuquan Wang 1, 2, 3, 4, 5
Affiliation
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In this study, novel alkali-resistant nanocomposite nanofiltration (NF) membranes were prepared via phase inversion by immersion precipitation combined with the addition of two kinds of functionalized graphene nanosheets. The effects of the functional groups and the concentrations of the graphene-based nanosheets on the microstructures and performances of nanocomposite membranes were systematically investigated. Compared with the pure polyethersulfone (PES) membrane, incorporation of a small amount of sulfonated graphene (SG) or graphene oxide (GO) into the PES matrix did not change the membrane morphology. However, the hydrophilicity, permeability and antifouling capabilities were remarkably enhanced without obvious reduction in membrane rejection. Particularly, the water fluxes of optimized PES–SG and PES–GO NF membranes at 0.1 wt% were improved by 119.7% and 71.3%, respectively. Moreover, the PES–SG series membranes exhibited better hydrophilicity and membrane separation performance than the PES–GO series membranes, which was attributed to the different ionisable functional groups from the SG and GO nanosheets. Both the optimized PES–SG and PES–GO NF membranes exhibited long-term stability during a seven-day test in alkaline solution, but PES–SG demonstrated greater promise as a novel alkali-resistant NF membrane due to its superior permeability and antifouling performance.
中文翻译：
具有增强的渗透性和防污性能的新型耐碱纳米过滤膜的制备和表征：功能化石墨烯纳米片的作用†
在这项研究中，新型的耐碱纳米复合纳米过滤（NF）膜是通过通过浸没沉淀进行相转化，并添加两种功能化的石墨烯纳米片。系统地研究了官能团和石墨烯基纳米片的浓度对纳米复合膜的微观结构和性能的影响。与纯聚醚砜（PES）膜相比，将少量磺化石墨烯（SG）或氧化石墨烯（GO）掺入PES基质不会改变膜的形态。但是，其亲水性，渗透性和防污能力得到了显着提高，而膜截留率却没有明显降低。特别是，优化的PES–SG和PES–GO NF膜在0.1 wt％时的水通量分别提高了119.7％和71.3％。而且，PES–SG系列膜比PES–GO系列膜表现出更好的亲水性和膜分离性能，这归因于SG和GO纳米片具有不同的可电离官能团。经过优化的PES–SG和PES–GO NF膜在碱性溶液中进行了7天的测试均显示出长期稳定性，但是PES–SG由于其优异的渗透性和防污性能而被证明是一种新型的耐碱NF膜。
更新日期：2017-03-29
中文翻译：
具有增强的渗透性和防污性能的新型耐碱纳米过滤膜的制备和表征：功能化石墨烯纳米片的作用†
在这项研究中，新型的耐碱纳米复合纳米过滤（NF）膜是通过通过浸没沉淀进行相转化，并添加两种功能化的石墨烯纳米片。系统地研究了官能团和石墨烯基纳米片的浓度对纳米复合膜的微观结构和性能的影响。与纯聚醚砜（PES）膜相比，将少量磺化石墨烯（SG）或氧化石墨烯（GO）掺入PES基质不会改变膜的形态。但是，其亲水性，渗透性和防污能力得到了显着提高，而膜截留率却没有明显降低。特别是，优化的PES–SG和PES–GO NF膜在0.1 wt％时的水通量分别提高了119.7％和71.3％。而且，PES–SG系列膜比PES–GO系列膜表现出更好的亲水性和膜分离性能，这归因于SG和GO纳米片具有不同的可电离官能团。经过优化的PES–SG和PES–GO NF膜在碱性溶液中进行了7天的测试均显示出长期稳定性，但是PES–SG由于其优异的渗透性和防污性能而被证明是一种新型的耐碱NF膜。
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