Embedded high-hydrophobic CNMs prepared by CVD technique with PVDF-co-HFP membrane for application in water desalination by DCMD

Mustafa Mohammed Aljumaily, Mohammed Abdulhakim Alsaadi, N. Awanis Hashim, Qusay F. Alsalhy, Rasel Das, Farouk Mjalli

Research output: Contribution to journalArticle

Abstract

In this work, conditions for fabricating high-hydrophobic carbon nanomaterials (CNMs) by chemical vapor deposition technique on nickel-doped powder activated carbon such as reaction temperature, reaction time, and H 2 :CH 4 gas ratio were optimized to achieve the optimum contact angle (CA). The results showed that the optimal reaction temperature, H 2 :CH 4 gas ratio, and reaction time for the highest CA of 145° were 950°C, 1:1, and 20 min, respectively. The CNM with a CA of 145° was embedded with poly(vinylidene fluoride-co-hexafluoropropylene) (PVDF-co-HFP) membrane to improve its hydrophobicity and, in turn, its seawater desalination performance by direct contact membrane distillation (DCMD). Various CNM contents (i.e., 1.0, 3.0 and 5.0 wt.%) were embedded with 22:78 (wt.%) of PVDF-co-HFP/N-Methyl-2-pyrrolidone solution to prepare flat-sheet membranes via phase inversion. CNM content plays an important role in the membrane preparation and thus affected the DCMD performance. Particularly interesting was the membrane prepared from dope mixture with the 5 wt.% CNMs, which resulted in an increase in CA from 83° to 133°, and porosity from 45.3% to 96.94%, along with a decrease in the membrane thickness from 210 to 165 µm. However, CNM embedding into the casting mixture also affected the membrane’s mechanical properties. Finally, DCMD permeation was enhanced from 10 to 16 L/hm 2 by embedding 5 wt.% of CNMs at the feed temperature of 45°C with salt rejection >99.9%.

Original languageEnglish
Pages (from-to)37-48
Number of pages12
JournalDesalination and Water Treatment
Volume142
DOIs
Publication statusPublished - Feb 1 2019

Fingerprint

Desalination
distillation
Nanostructured materials
fluoride
Distillation
Chemical vapor deposition
membrane
Membranes
Carbon
carbon
Water
Contact angle
water desalination
temperature
hydrophobicity
Hydrophobicity
Gases
Seawater
gas
Permeation

Keywords

  • Carbon nanomaterials
  • Chemical vapour deposition
  • Desalination
  • Direct contact membrane distillation
  • Hydrophobicity
  • PVDF-co-HFP

ASJC Scopus subject areas

  • Water Science and Technology
  • Ocean Engineering
  • Pollution

Cite this

Embedded high-hydrophobic CNMs prepared by CVD technique with PVDF-co-HFP membrane for application in water desalination by DCMD. / Aljumaily, Mustafa Mohammed; Alsaadi, Mohammed Abdulhakim; Awanis Hashim, N.; Alsalhy, Qusay F.; Das, Rasel; Mjalli, Farouk.

In: Desalination and Water Treatment, Vol. 142, 01.02.2019, p. 37-48.

Research output: Contribution to journalArticle

Aljumaily, Mustafa Mohammed ; Alsaadi, Mohammed Abdulhakim ; Awanis Hashim, N. ; Alsalhy, Qusay F. ; Das, Rasel ; Mjalli, Farouk. / Embedded high-hydrophobic CNMs prepared by CVD technique with PVDF-co-HFP membrane for application in water desalination by DCMD. In: Desalination and Water Treatment. 2019 ; Vol. 142. pp. 37-48.
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abstract = "In this work, conditions for fabricating high-hydrophobic carbon nanomaterials (CNMs) by chemical vapor deposition technique on nickel-doped powder activated carbon such as reaction temperature, reaction time, and H 2 :CH 4 gas ratio were optimized to achieve the optimum contact angle (CA). The results showed that the optimal reaction temperature, H 2 :CH 4 gas ratio, and reaction time for the highest CA of 145° were 950°C, 1:1, and 20 min, respectively. The CNM with a CA of 145° was embedded with poly(vinylidene fluoride-co-hexafluoropropylene) (PVDF-co-HFP) membrane to improve its hydrophobicity and, in turn, its seawater desalination performance by direct contact membrane distillation (DCMD). Various CNM contents (i.e., 1.0, 3.0 and 5.0 wt.{\%}) were embedded with 22:78 (wt.{\%}) of PVDF-co-HFP/N-Methyl-2-pyrrolidone solution to prepare flat-sheet membranes via phase inversion. CNM content plays an important role in the membrane preparation and thus affected the DCMD performance. Particularly interesting was the membrane prepared from dope mixture with the 5 wt.{\%} CNMs, which resulted in an increase in CA from 83° to 133°, and porosity from 45.3{\%} to 96.94{\%}, along with a decrease in the membrane thickness from 210 to 165 µm. However, CNM embedding into the casting mixture also affected the membrane’s mechanical properties. Finally, DCMD permeation was enhanced from 10 to 16 L/hm 2 by embedding 5 wt.{\%} of CNMs at the feed temperature of 45°C with salt rejection >99.9{\%}.",
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T1 - Embedded high-hydrophobic CNMs prepared by CVD technique with PVDF-co-HFP membrane for application in water desalination by DCMD

AU - Aljumaily, Mustafa Mohammed

AU - Alsaadi, Mohammed Abdulhakim

AU - Awanis Hashim, N.

AU - Alsalhy, Qusay F.

AU - Das, Rasel

AU - Mjalli, Farouk

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AB - In this work, conditions for fabricating high-hydrophobic carbon nanomaterials (CNMs) by chemical vapor deposition technique on nickel-doped powder activated carbon such as reaction temperature, reaction time, and H 2 :CH 4 gas ratio were optimized to achieve the optimum contact angle (CA). The results showed that the optimal reaction temperature, H 2 :CH 4 gas ratio, and reaction time for the highest CA of 145° were 950°C, 1:1, and 20 min, respectively. The CNM with a CA of 145° was embedded with poly(vinylidene fluoride-co-hexafluoropropylene) (PVDF-co-HFP) membrane to improve its hydrophobicity and, in turn, its seawater desalination performance by direct contact membrane distillation (DCMD). Various CNM contents (i.e., 1.0, 3.0 and 5.0 wt.%) were embedded with 22:78 (wt.%) of PVDF-co-HFP/N-Methyl-2-pyrrolidone solution to prepare flat-sheet membranes via phase inversion. CNM content plays an important role in the membrane preparation and thus affected the DCMD performance. Particularly interesting was the membrane prepared from dope mixture with the 5 wt.% CNMs, which resulted in an increase in CA from 83° to 133°, and porosity from 45.3% to 96.94%, along with a decrease in the membrane thickness from 210 to 165 µm. However, CNM embedding into the casting mixture also affected the membrane’s mechanical properties. Finally, DCMD permeation was enhanced from 10 to 16 L/hm 2 by embedding 5 wt.% of CNMs at the feed temperature of 45°C with salt rejection >99.9%.

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KW - Hydrophobicity

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