A Bilayered Structure Comprised of Functionalized Carbon Nanotubes for Desalination by Membrane Distillation

Madhuleena Bhadra; Sagar Roy; Somenath Mitra

doi:10.1021/acsami.6b05644

A Bilayered Structure Comprised of Functionalized Carbon Nanotubes for Desalination by Membrane Distillation

Madhuleena Bhadra, Sagar Roy, Somenath Mitra

Research output: Contribution to journal › Article › peer-review

73 Scopus citations

Abstract

The development of a novel carbon nanotube (CNT) immobilized membrane comprised of a double-layer structure is presented for water desalination by membrane distillation. The bilayered structure is comprised of CNTs functionalized with a hydrophobic octadecyl amine group on the feed side and carboxylated CNTs on the permeate side. The latter is more hydrophilic. The hydrophobic CNTs provide higher water vapor permeation, while the hydrophilic CNTs facilitate the condensation of water vapor. Together, these led to superior performance, and flux in a direct contact membrane distillation mode was found to be as high as 121 kg/m²h at 80 °C. The bilayered membrane represented an enhancement of 70% over the unmodified membrane and 37% over a membrane which had a monolayered structure where only the feed side was CNT-modified.

Original language	English (US)
Pages (from-to)	19507-19513
Number of pages	7
Journal	ACS Applied Materials and Interfaces
Volume	8
Issue number	30
DOIs	https://doi.org/10.1021/acsami.6b05644
State	Published - Aug 3 2016

All Science Journal Classification (ASJC) codes

General Materials Science

Keywords

DCMD
PTFE
functionalized CNTs
mass transfer
water vapor flux

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10.1021/acsami.6b05644

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title = "A Bilayered Structure Comprised of Functionalized Carbon Nanotubes for Desalination by Membrane Distillation",

abstract = "The development of a novel carbon nanotube (CNT) immobilized membrane comprised of a double-layer structure is presented for water desalination by membrane distillation. The bilayered structure is comprised of CNTs functionalized with a hydrophobic octadecyl amine group on the feed side and carboxylated CNTs on the permeate side. The latter is more hydrophilic. The hydrophobic CNTs provide higher water vapor permeation, while the hydrophilic CNTs facilitate the condensation of water vapor. Together, these led to superior performance, and flux in a direct contact membrane distillation mode was found to be as high as 121 kg/m2h at 80 °C. The bilayered membrane represented an enhancement of 70% over the unmodified membrane and 37% over a membrane which had a monolayered structure where only the feed side was CNT-modified.",

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author = "Madhuleena Bhadra and Sagar Roy and Somenath Mitra",

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T1 - A Bilayered Structure Comprised of Functionalized Carbon Nanotubes for Desalination by Membrane Distillation

AU - Bhadra, Madhuleena

AU - Roy, Sagar

AU - Mitra, Somenath

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Y1 - 2016/8/3

N2 - The development of a novel carbon nanotube (CNT) immobilized membrane comprised of a double-layer structure is presented for water desalination by membrane distillation. The bilayered structure is comprised of CNTs functionalized with a hydrophobic octadecyl amine group on the feed side and carboxylated CNTs on the permeate side. The latter is more hydrophilic. The hydrophobic CNTs provide higher water vapor permeation, while the hydrophilic CNTs facilitate the condensation of water vapor. Together, these led to superior performance, and flux in a direct contact membrane distillation mode was found to be as high as 121 kg/m2h at 80 °C. The bilayered membrane represented an enhancement of 70% over the unmodified membrane and 37% over a membrane which had a monolayered structure where only the feed side was CNT-modified.

AB - The development of a novel carbon nanotube (CNT) immobilized membrane comprised of a double-layer structure is presented for water desalination by membrane distillation. The bilayered structure is comprised of CNTs functionalized with a hydrophobic octadecyl amine group on the feed side and carboxylated CNTs on the permeate side. The latter is more hydrophilic. The hydrophobic CNTs provide higher water vapor permeation, while the hydrophilic CNTs facilitate the condensation of water vapor. Together, these led to superior performance, and flux in a direct contact membrane distillation mode was found to be as high as 121 kg/m2h at 80 °C. The bilayered membrane represented an enhancement of 70% over the unmodified membrane and 37% over a membrane which had a monolayered structure where only the feed side was CNT-modified.

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KW - PTFE

KW - functionalized CNTs

KW - mass transfer

KW - water vapor flux

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A Bilayered Structure Comprised of Functionalized Carbon Nanotubes for Desalination by Membrane Distillation

Abstract

All Science Journal Classification (ASJC) codes

Keywords

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