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Supplementary Data
Thin-film nanocomposite membrane with CNT
positioning in support layer for energy harvesting
from saline water
Moon Son a, Hosik Park b, Lei Liu a, Hyeongyu Choi a, Joon Ha Kim a, and Heechul Choi a,*
a School of Environmental Science and Engineering, Gwangju Institute of Science and
Technology (GIST), 123 Cheomdangwagi-ro, Buk-gu, Gwangju 500-712, Republic of Korea
b Center for Membranes, Advanced Materials Division, Korea Research Institute of Chemical
Technology (KRICT), 141 Gajeong-ro, Yuseong-gu, Daejeon 305-600, Republic of Korea
* Corresponding author. Email: hcchoi@gist.ac.kr, Tel.: +82-62-715-2441, Fax: +82-62-715-
2434
A Manuscript for
Chemical Engineering Journal
KEYWORDS: thin-film nanocomposite; membrane; carbon nanotube; pressure retarded
osmosis; energy harvesting
Fig. S1. Schematic illustration for the reverse osmosis (RO) and pressure retarded osmosis (PRO) processes.
Fig. S2. Cost analysis of adding carbon nanotubes (CNT) to the total membrane material cost for thin-film nanocomposite (TFN) membrane. (a) Lab-scale chemicals and polymer purchased by Sigma-Aldrich and Solvay Company; (b) Industry chemicals searched in various companies by web. Solvent: n-methyl-2-pyrrolidinone (NMP), Polymer: polyethersulfone (PES), Additive: polyvinylpyrrolidone (PVP), Precursor: trimesoyl chloride (TMC) and m-phenylenediamine (MPD).
Fig. S3. Conceptual illustration of the concentration polarization of TFC, TFN, and TFN-500 membranes at high applied pressure condition in the draw side.
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