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Assembly of Graphene Oxide Nanosheets on Diamine-Treated PVDF Hollow Fiber as Nanofiltration Membranes
ACS Applied Polymer Materials ( IF 4.4 ) Pub Date : 2020-08-12 , DOI: 10.1021/acsapm.0c00558 Kiwon Eum 1, 2 , Dae Woo Kim 3 , Yunkyu Choi 3 , Xuekui Duan 1 , Marc A. Hillmyer 4 , Michael Tsapatsis 1, 5, 6
ACS Applied Polymer Materials ( IF 4.4 ) Pub Date : 2020-08-12 , DOI: 10.1021/acsapm.0c00558 Kiwon Eum 1, 2 , Dae Woo Kim 3 , Yunkyu Choi 3 , Xuekui Duan 1 , Marc A. Hillmyer 4 , Michael Tsapatsis 1, 5, 6
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A graphene oxide (GO)-based nanofiltration membrane was fabricated on ethylenediamine-functionalized-polyvinylidene fluoride (EDA-PVDF) hollow fibers. EDA-PVDF was prepared by hydrothermal treatment of polyvinylidene fluoride (PVDF) with ethylenediamine (EDA). On the basis of the interaction of oxygen-containing functional groups of GO and amine groups of EDA-PVDF fiber, a uniform GO layer can be formed in a few seconds by simple immersion of the EDA-cross-linked PVDF fiber in a GO aqueous solution. The GO layer thickness can be controlled from ∼20 nm to several micrometers depending on the concentration of the GO solution (0.5 – 20 mg/mL). The GO layer is shown to be stable in water. The stability is attributed to the EDA in the EDA-PVDF fiber not only forming cross-links between GO and PVDF but also diffusing into the GO interlayer. Filtration tests with dye solutions show that the GO-EDA-PVDF fiber membrane can reject molecules with hydration radii larger than 8 Å (brilliant blue) with rejections (percentage of solute concentration of permeate removed from feed solution by the membrane) of over 95%. Finally, the stable performance of the GO-EDA-PVDF membrane is confirmed by practical crossflow filtration.
中文翻译：
氧化石墨烯纳米片在二胺处理的PVDF中空纤维上的组装作为纳滤膜
在乙二胺官能化的聚偏二氟乙烯（EDA-PVDF）中空纤维上制备了基于氧化石墨烯（GO）的纳滤膜。EDA-PVDF是通过乙二胺（EDA）对聚偏二氟乙烯（PVDF）进行水热处理而制备的。根据GO的含氧官能团和EDA-PVDF纤维的胺基的相互作用，只需将EDA交联的PVDF纤维简单浸入GO水溶液中，即可在几秒钟内形成均匀的GO层。解。GO层的厚度可根据GO溶液的浓度（0.5 – 20 mg / mL）控制在约20 nm至几微米之间。显示GO层在水中是稳定的。稳定性归因于EDA-PVDF纤维中的EDA，不仅在GO和PVDF之间形成交联，而且扩散到GO中间层。染料溶液的过滤测试表明，GO-EDA-PVDF纤维膜可以截留水合半径大于8Å（亮蓝）的分子，且截留率（膜从进料溶液中去除的渗透物的溶质浓度百分比）超过95％ 。最后，通过实用的错流过滤证实了GO-EDA-PVDF膜的稳定性能。
更新日期：2020-09-11
中文翻译：
氧化石墨烯纳米片在二胺处理的PVDF中空纤维上的组装作为纳滤膜
在乙二胺官能化的聚偏二氟乙烯（EDA-PVDF）中空纤维上制备了基于氧化石墨烯（GO）的纳滤膜。EDA-PVDF是通过乙二胺（EDA）对聚偏二氟乙烯（PVDF）进行水热处理而制备的。根据GO的含氧官能团和EDA-PVDF纤维的胺基的相互作用，只需将EDA交联的PVDF纤维简单浸入GO水溶液中，即可在几秒钟内形成均匀的GO层。解。GO层的厚度可根据GO溶液的浓度（0.5 – 20 mg / mL）控制在约20 nm至几微米之间。显示GO层在水中是稳定的。稳定性归因于EDA-PVDF纤维中的EDA，不仅在GO和PVDF之间形成交联，而且扩散到GO中间层。染料溶液的过滤测试表明，GO-EDA-PVDF纤维膜可以截留水合半径大于8Å（亮蓝）的分子，且截留率（膜从进料溶液中去除的渗透物的溶质浓度百分比）超过95％ 。最后，通过实用的错流过滤证实了GO-EDA-PVDF膜的稳定性能。
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