Assembly of Graphene Oxide Nanosheets on Diamine-Treated PVDF Hollow Fiber as Nanofiltration Membranes
- Authors
- Eum, Kiwon; Kim, Dae Woo; Choi, Yunkyu; Duan, Xuekui; Hillmyer, Marc A.; Tsapatsis, Michael
- Issue Date
- Sep-2020
- Publisher
- AMER CHEMICAL SOC
- Keywords
- graphene oxide; membrane; nanofiltration; hollow fiber; assembly
- Citation
- Acs Applied Polymer Materials, v.2, no.9, pp.3859 - 3866
- Journal Title
- Acs Applied Polymer Materials
- Volume
- 2
- Number
- 9
- Start Page
- 3859
- End Page
- 3866
- URI
- http://scholarworks.bwise.kr/ssu/handle/2018.sw.ssu/39689
- DOI
- 10.1021/acsapm.0c00558
- ISSN
- 2637-6105
- Abstract
- 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 similar to 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 angstrom (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.
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