Assembly of Graphene Oxide Nanosheets on Diamine-Treated PVDF Hollow Fiber as Nanofiltration Membranes

Kiwon Eum, Dae Woo Kim, Yunkyu Choi, Xuekui Duan, Marc A. Hillmyer, Michael Tsapatsis

Research output: Contribution to journalArticlepeer-review

6 Scopus citations

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 ∼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.

Original languageEnglish (US)
Pages (from-to)3859-3866
Number of pages8
JournalACS Applied Polymer Materials
Volume2
Issue number9
DOIs
StatePublished - Sep 11 2020

Bibliographical note

Funding Information:
The work was supported by the Environment and Natural Resources Trust Fund as recommended by the Legislative-Citizen Commission on Minnesota Resources. D.W.K. was supported by the Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education (2015R1A6A3A04057367).

Publisher Copyright:
Copyright © 2020 American Chemical Society.

Keywords

  • assembly
  • graphene oxide
  • hollow fiber
  • membrane
  • nanofiltration

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