Journal ArticleDOI
Ultrathin Polyamide Nanofiltration Membrane Fabricated on Brush-Painted Single-Walled Carbon Nanotube Network Support for Ion Sieving
Shoujian Gao,Shoujian Gao,Yuzhang Zhu,Yuqiong Gong,Zhenyi Wang,Zhenyi Wang,Wangxi Fang,Wangxi Fang,Jian Jin,Jian Jin,Jian Jin +10 more
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TLDR
This work demonstrates a practical route toward the controllable large-scale fabrication of the TFC membrane with an SWCNT network support for ion and molecule sieving and is expected to boost the mass production and practical applications of state-of-the-art membranes composed of one-dimensional and two-dimensional Nanomaterials as well as the nanomaterial-supported TFC membranes.Abstract:
Recently, ultrathin polyamide nanofiltration membranes fabricated on nanomaterial-based supports have overcome the limitations of conventional supports and show greatly improved separation performance. However, the feasibility of the nanomaterial-based supports for large-scale fabrication of the ultrathin polyamide membrane is still unclear. Herein, we report a controllable and saleable fabrication technique for a single-walled carbon nanotube (SWCNT) network support via brush painting. The mechanical and chemical stability of the SWCNT network support were carefully examined, and an ultrathin polyamide membrane with thickness of ∼15 nm was successfully fabricated based on such a support. The obtained thin-film composite (TFC) polyamide nanofiltration membranes exhibited extremely high water permeability of ∼40 L m-2 h -1 bar-1, a high Na2SO 4 rejection of 96.5%, and high monovalent/divalent ion permeation selectivity and maintained highly efficient ion sieving throughout 48 h of testing. This work demonstrates a practical route toward the controllable large-scale fabrication of the TFC membrane with an SWCNT network support for ion and molecule sieving. This work is also expected to boost the mass production and practical applications of state-of-the-art membranes composed of one-dimensional and two-dimensional nanomaterials as well as the nanomaterial-supported TFC membranes.read more
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Journal ArticleDOI
The upper bound of thin-film composite (TFC) polyamide membranes for desalination
TL;DR: This work analyzed the tradeoff between the water permeance and the water/NaCl selectivity for TFC membranes gathered from more than 300 published papers, providing a critical tool for the evaluation and benchmarking of future membrane development works in the context of desalination and water reuse.
Journal ArticleDOI
A Critical Review on Thin-Film Nanocomposite Membranes with Interlayered Structure: Mechanisms, Recent Developments, and Environmental Applications
Zhiqing Yang,Peng Fei Sun,Peng Fei Sun,Xianhui Li,Bowen Gan,Bowen Gan,Li Wang,Xiaoxiao Song,Hee Deung Park,Chuyang Y. Tang +9 more
TL;DR: The use of nanostructured interlayers not only improves the formation of polyamide rejection layers but also provides an optimized water transport path, which enables TFNi membranes to potentially overcome the longstanding trade-off between membrane permeability and selectivity.
Journal ArticleDOI
Molecularly soldered covalent organic frameworks for ultrafast precision sieving
TL;DR: In this paper, a facile in situ molecularly soldered strategy was developed to fabricate defect-free ultrathin COF membranes with precise sieving abilities using the typical chemical environment for COF condensation polymerization and dopamine self-polymerization.
Journal ArticleDOI
Ultraselective and Highly Permeable Polyamide Nanofilms for Ionic and Molecular Nanofiltration
Journal ArticleDOI
How to coordinate the trade-off between water permeability and salt rejection in nanofiltration?
TL;DR: In this paper, the functional layer of a nanofiltration (NF) membrane is divided into four different mass transfer regions according to its mass transfer characteristics, and the relationship between water permeability and salt rejection has been expounded according to the mass transfer properties of the four regions.
References
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Journal ArticleDOI
The Future of Seawater Desalination: Energy, Technology, and the Environment
TL;DR: The possible reductions in energy demand by state-of-the-art seawater Desalination technologies, the potential role of advanced materials and innovative technologies in improving performance, and the sustainability of desalination as a technological solution to global water shortages are reviewed.
Journal ArticleDOI
Composite reverse osmosis and nanofiltration membranes
TL;DR: A review of the field of thin film composite reverse osmosis membranes, with emphasis on the chemistry and composition of these membranes, is given in this article, with particular attention given to composite membranes that have found commercial use, whether in the present or past.
Journal ArticleDOI
Ultrathin Graphene Nanofiltration Membrane for Water Purification
TL;DR: In this article, a method of fabricating ultrathin (22-53 nm thick) graphene nanofiltration membranes (uGNMs) on microporous substrates is presented for efficient water purification using chemically converted graphene (CCG).
Journal ArticleDOI
Sub–10 nm polyamide nanofilms with ultrafast solvent transport for molecular separation
TL;DR: Thin, crumpled polymer films on ceramic supports are high-flux membranes for removing small molecules from organic fluids and were sufficiently rigid that the crumpling textures could withstand pressurized filtration, resulting in increased permeable area.
Journal ArticleDOI
Interfacial polymerization of thin film nanocomposites: A new concept for reverse osmosis membranes
Byeong-Heon Jeong,Eric M.V. Hoek,Yushan Yan,Arun Subramani,Xiaofei Huang,Gil Hurwitz,A. K. Ghosh,Anna Jawor +7 more
TL;DR: In this article, a new concept for formation of mixed matrix reverse osmosis membranes by interfacial polymerization of nanocomposite thin films in situ on porous polysulfone supports is reported.