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Highly porous carbon nanotube/polysulfone nanocomposite supports for high-flux polyamide reverse osmosis membranes

Title
Highly porous carbon nanotube/polysulfone nanocomposite supports for high-flux polyamide reverse osmosis membranes
Author
박호범
Keywords
Reverse osmosis; Desalination; Carbon nanotube; Supports; Polymer nanocomposites
Issue Date
2017-06
Publisher
ELSEVIER SCIENCE BV
Citation
JOURNAL OF MEMBRANE SCIENCE, v. 539, page. 441-450
Abstract
Recent studies have emphasized that the surface properties of support layers in thin-film composite (TFC) membranes play a significant role in reverse osmosis (RO) performance. In this study, we used carbon nanotubes (CNTs) to tune the surface properties of microporous polysulfone membranes. The prepared CNT/PSf nanocomposite supports showed significantly improved surface porosity while maintaining both surface pore radius and hydrophobicity. Such surface characteristics resulted in the defect-free formation of a polyamide (PA) selective layer possessing a large surface area, which led to enhancement in the flux of PA-TFC membranes. PA-TFC membranes prepared with CNT/PSf nanocomposite supports showed improved water permeance up to 35% without losing salt rejection compared to the bare PA-TFC membranes. The results revealed that the surface porosity of the support is a dominant factor influencing the water permeance of TFC membranes rather than the pure water flux inside the support itself or the thickness of the PA layer. We also propose a direction for generating optimal supports through a comparison study between CNTs and hydrophilic pore formers as additives in the support material.
URI
https://www.sciencedirect.com/science/article/pii/S0376738817308189?via%3Dihubhttps://repository.hanyang.ac.kr/handle/20.500.11754/114393
ISSN
0376-7388; 1873-3123
DOI
10.1016/j.memsci.2017.06.027
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > ENERGY ENGINEERING(에너지공학과) > Articles
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