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

Document Type

Article

Publication Date

8-3-2016

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.

Identifier

84982740686 (Scopus)

Publication Title

ACS Applied Materials and Interfaces

External Full Text Location

https://doi.org/10.1021/acsami.6b05644

e-ISSN

19448252

ISSN

19448244

First Page

19507

Last Page

19513

Issue

30

Volume

8

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