Graphene Nanoribbon/Carbon Nanotube Hybrid Hydrogel: Rheology and Membrane for Ultrafast Molecular Diafiltration

Ju Yeon Kim, Yunkyu Choi, Jiho Choi, Yong Jae Kim, Junhyeok Kang, Jeong Pil Kim, Ji Hoon Kim, Ohchan Kwon, Sung Soo Kim, Dae Woo Kim

Research output: Contribution to journalArticlepeer-review

Abstract

Hybrids based on carbon nanotubes (CNTs) and graphene nanoribbons (GNRs) are expected to have synergistic effects for various applications. Herein, we demonstrate a simple one-pot synthesis of a CNT/GNR hybrid material by adjusting the oxidation and unzipping conditions of multi-walled CNTs (MWNTs). The MWNT/graphene oxide nanoribbon (GONR) hybrid was dispersed in various solvents, particularly showing the hybrid hydrogel phase in water at a concentration of 40 mg mL-1. The MWNT/GONR hydrogel exhibited shear-thinning behavior, which can be beneficial for coating a large-area MWNT/GONR layer onto a polymeric porous support by using a scalable slot-die coater. The MWNT/GONR membrane exhibited an outstanding nanofiltration performance, with a molecular weight cutoff of 300 Da and a dye/salt diafiltration performance with a separation factor of 1000 and a water flux of 367.8 LMH, far surpassing the upper bound of diafiltration performance of the existing membranes.

Original languageEnglish
Pages (from-to)11779-11788
Number of pages10
JournalACS Applied Materials and Interfaces
Volume14
Issue number9
DOIs
Publication statusPublished - 2022 Mar 9

Bibliographical note

Funding Information:
This research was supported by a basic science research program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education (NRF-2019R1A6A1A11055660). This work was supported by the NRF grant funded by the Korean government (MSIT) (NRF-2020R1C1C1003289).

Publisher Copyright:
© 2022 American Chemical Society

All Science Journal Classification (ASJC) codes

  • Materials Science(all)

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