Robust water desalination membranes against degradation using high loads of carbon nanotubes

J. Ortiz-Medina, S. Inukai, T. Araki, A. Morelos-Gomez, R. Cruz-Silva, K. Takeuchi, T. Noguchi, T. Kawaguchi, M. Terrones, M. Endo

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

Chlorine resistant reverse osmosis (RO) membranes were fabricated using a multi-walled carbon nanotube-polyamide (MWCNT-PA) nanocomposite. The separation performance of these membranes after chlorine exposure (4800 ppm·h) remained unchanged (99.9%) but was drastically reduced to 82% in the absence of MWCNT. It was observed that the surface roughness of the membranes changed significantly by adding MWCNT. Moreover, membranes containing MWCNT fractions above 12.5 wt.% clearly improved degradation resistance against chlorine exposure, with an increase in water flux while maintaining salt rejection performance. Molecular dynamics and quantum chemical calculations were performed in order to understand the high chemical stability of the MWCNT-PA nanocomposite membranes, and revealed that high activation energies are required for the chlorination of PA. The results presented here confirm the unique potential of carbon nanomaterials embedded in polymeric composite membranes for efficient RO water desalination technologies.

Original languageEnglish (US)
Article number2748
JournalScientific reports
Volume8
Issue number1
DOIs
StatePublished - Dec 1 2018

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Carbon Nanotubes
Membranes
Water
Chlorine
Osmosis
Nanocomposites
Nylons
Nanostructures
Halogenation
Molecular Dynamics Simulation
Carbon
Salts
Technology

All Science Journal Classification (ASJC) codes

  • General

Cite this

Ortiz-Medina, J., Inukai, S., Araki, T., Morelos-Gomez, A., Cruz-Silva, R., Takeuchi, K., ... Endo, M. (2018). Robust water desalination membranes against degradation using high loads of carbon nanotubes. Scientific reports, 8(1), [2748]. https://doi.org/10.1038/s41598-018-21192-5
Ortiz-Medina, J. ; Inukai, S. ; Araki, T. ; Morelos-Gomez, A. ; Cruz-Silva, R. ; Takeuchi, K. ; Noguchi, T. ; Kawaguchi, T. ; Terrones, M. ; Endo, M. / Robust water desalination membranes against degradation using high loads of carbon nanotubes. In: Scientific reports. 2018 ; Vol. 8, No. 1.
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Ortiz-Medina, J, Inukai, S, Araki, T, Morelos-Gomez, A, Cruz-Silva, R, Takeuchi, K, Noguchi, T, Kawaguchi, T, Terrones, M & Endo, M 2018, 'Robust water desalination membranes against degradation using high loads of carbon nanotubes', Scientific reports, vol. 8, no. 1, 2748. https://doi.org/10.1038/s41598-018-21192-5

Robust water desalination membranes against degradation using high loads of carbon nanotubes. / Ortiz-Medina, J.; Inukai, S.; Araki, T.; Morelos-Gomez, A.; Cruz-Silva, R.; Takeuchi, K.; Noguchi, T.; Kawaguchi, T.; Terrones, M.; Endo, M.

In: Scientific reports, Vol. 8, No. 1, 2748, 01.12.2018.

Research output: Contribution to journalArticle

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AU - Ortiz-Medina, J.

AU - Inukai, S.

AU - Araki, T.

AU - Morelos-Gomez, A.

AU - Cruz-Silva, R.

AU - Takeuchi, K.

AU - Noguchi, T.

AU - Kawaguchi, T.

AU - Terrones, M.

AU - Endo, M.

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N2 - Chlorine resistant reverse osmosis (RO) membranes were fabricated using a multi-walled carbon nanotube-polyamide (MWCNT-PA) nanocomposite. The separation performance of these membranes after chlorine exposure (4800 ppm·h) remained unchanged (99.9%) but was drastically reduced to 82% in the absence of MWCNT. It was observed that the surface roughness of the membranes changed significantly by adding MWCNT. Moreover, membranes containing MWCNT fractions above 12.5 wt.% clearly improved degradation resistance against chlorine exposure, with an increase in water flux while maintaining salt rejection performance. Molecular dynamics and quantum chemical calculations were performed in order to understand the high chemical stability of the MWCNT-PA nanocomposite membranes, and revealed that high activation energies are required for the chlorination of PA. The results presented here confirm the unique potential of carbon nanomaterials embedded in polymeric composite membranes for efficient RO water desalination technologies.

AB - Chlorine resistant reverse osmosis (RO) membranes were fabricated using a multi-walled carbon nanotube-polyamide (MWCNT-PA) nanocomposite. The separation performance of these membranes after chlorine exposure (4800 ppm·h) remained unchanged (99.9%) but was drastically reduced to 82% in the absence of MWCNT. It was observed that the surface roughness of the membranes changed significantly by adding MWCNT. Moreover, membranes containing MWCNT fractions above 12.5 wt.% clearly improved degradation resistance against chlorine exposure, with an increase in water flux while maintaining salt rejection performance. Molecular dynamics and quantum chemical calculations were performed in order to understand the high chemical stability of the MWCNT-PA nanocomposite membranes, and revealed that high activation energies are required for the chlorination of PA. The results presented here confirm the unique potential of carbon nanomaterials embedded in polymeric composite membranes for efficient RO water desalination technologies.

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Ortiz-Medina J, Inukai S, Araki T, Morelos-Gomez A, Cruz-Silva R, Takeuchi K et al. Robust water desalination membranes against degradation using high loads of carbon nanotubes. Scientific reports. 2018 Dec 1;8(1). 2748. https://doi.org/10.1038/s41598-018-21192-5