Thin film composite forward osmosis membranes based on polydopamine modified polysulfone substrates with enhancements in both water flux and salt rejection

2012 ◽  
Vol 80 ◽  
pp. 219-231 ◽  
Author(s):  
Gang Han ◽  
Sui Zhang ◽  
Xue Li ◽  
Natalia Widjojo ◽  
Tai-Shung Chung
Keyword(s):  
Thin Film ◽  
Water Flux ◽  
Forward Osmosis ◽  
Film Composite ◽  
Salt Rejection ◽  
Thin Film Composite

scholarly journals Preparation of thin-film composite membranes supported with electrospun nanofibers for desalination by forward osmosis

2020 ◽  
Vol 13 (2) ◽  
pp. 51-57
Author(s):  
Mustafa Al-Furaiji ◽  
Mohammed Kadhom ◽  
Khairi Kalash ◽  
Basma Waisi ◽  
Noor Albayati
Keyword(s):  
Thin Film ◽  
Water Flux ◽  
Applied Pressure ◽  
Forward Osmosis ◽  
Composite Membranes ◽  
Polymerization Reaction ◽  
Film Composite ◽  
Salt Rejection ◽  
Thin Film Composite ◽  
Tfc Membrane

Abstract. The forward osmosis (FO) process has been considered to be a viable option for water desalination in comparison to the traditional processes like reverse osmosis, regarding energy consumption and economical operation. In this work, a polyacrylonitrile (PAN) nanofiber support layer was prepared using the electrospinning process as a modern method. Then, an interfacial polymerization reaction between m-phenylenediamine (MPD) and trimesoyl chloride (TMC) was carried out to generate a polyamide selective thin-film composite (TFC) membrane on the support layer. The TFC membrane was tested in FO mode (feed solution facing the active layer) using the standard methodology and compared to a commercially available cellulose triacetate membrane (CTA). The synthesized membrane showed a high performance in terms of water flux (16 Lm −2 h−1) but traded the salt rejection (4 gm−2 h−1) compared with the commercial CTA membrane (water flux = 13 Lm−2 h−1 and salt rejection = 3 gm−2 h−1) at no applied pressure and room temperature. Scanning electron microscopy (SEM), contact angle, mechanical properties, porosity, and performance characterizations were conducted to examine the membrane.

scholarly journals Fabrication of a novel cyanoethyl cellulose substrate for thin-film composite forward osmosis membrane

2019 ◽  
Vol 1 (1) ◽  
pp. 18-32 ◽  
Author(s):  
Ke Zheng ◽  
Shaoqi Zhou
Keyword(s):  
Thin Film ◽  
Water Flux ◽  
Forward Osmosis ◽  
Feed Solution ◽  
Salt Flux ◽  
Sem Images ◽  
Film Composite ◽  
Thin Film Composite ◽  
Reverse Salt Flux ◽  
Cyanoethyl Cellulose

Abstract In this study, cyanoethyl cellulose (CEC) was used as a membrane material, and polyvinylpyrrolidone (PVP) was used as pore-forming agent to prepare the substrates for the thin-film composite (TFC) forward osmosis (FO) membrane for the first time. The experimental results demonstrate that the properties of the substrates were significantly improved after PVP was added. The scanning electron microscope (SEM) images show that a two-sublayer structure, a fringe-like top sublayer and macrovoids with sponge-like wall bottom sublayer, were formed after the addition of PVP. These improvements contributed to improved membrane performance during FO tests. Meanwhile, after adding PVP, the TFC membranes exhibited good water flux, and excellent specific reverse salt flux. For instance, the TFC-M2 exhibited 9.10/20.67 LMH water flux, 1.35/2.24 gMH reverse salt flux, and 0.15/0.11 g/L specific reverse salt flux in FO/pressure-retarded osmosis mode while using 1 M NaCl as the draw solution and deionized (DI) water as the feed solution.

scholarly journals Comparison of performance and biofouling resistance of thin-film composite forward osmosis membranes with substrate/active layer modified by graphene oxide

RSC Advances ◽  
2019 ◽  
Vol 9 (12) ◽  
pp. 6502-6509 ◽  
Author(s):  
Yuan Li ◽  
Yu Yang ◽  
Chen Li ◽  
Li-an Hou
Keyword(s):  
Thin Film ◽  
Graphene Oxide ◽  
Active Layer ◽  
Water Flux ◽  
Forward Osmosis ◽  
Film Composite ◽  
Thin Film Composite

The substrate modified by GO could greatly improve water flux, whereas the GO-functionalized active layer is favorable for biofouling mitigation.

Thin-film composite forward osmosis membrane with high water flux and high pressure resistance using a thicker void-free polyketone porous support

Desalination ◽  
2017 ◽  
Vol 402 ◽  
pp. 1-9 ◽  
Author(s):  
Masahiro Yasukawa ◽  
Shoji Mishima ◽  
Yasuhiro Tanaka ◽  
Tomoki Takahashi ◽  
Hideto Matsuyama
Keyword(s):  
Thin Film ◽  
High Pressure ◽  
Water Flux ◽  
Forward Osmosis ◽  
High Water ◽  
Porous Support ◽  
Film Composite ◽  
Thin Film Composite ◽  
Pressure Resistance

scholarly journals Thin Film Composite Forward Osmosis Membrane with Single-Walled Carbon Nanotubes Interlayer for Alleviating Internal Concentration Polarization

Polymers ◽  
2020 ◽  
Vol 12 (2) ◽  
pp. 260 ◽  
Author(s):  
Yuanyuan Tang ◽  
Shan Li ◽  
Jia Xu ◽  
Congjie Gao
Keyword(s):  
Thin Film ◽  
Concentration Polarization ◽  
Water Flux ◽  
Forward Osmosis ◽  
Feed Solution ◽  
Film Composite ◽  
Thin Film Composite ◽  
Internal Concentration ◽  
Tfc Membrane ◽  
Internal Concentration Polarization

This study reported a series of thin film composite (TFC) membranes with single-walled nanotubes (SWCNTs) interlayers for the forward osmosis (FO) application. Pure SWCNTs with ultrahigh length-to-diameter ratio and without any functional group were applied to form an interconnect network interlayer via strong π-π interactions. Compared to the TFC membrane without SWCNTs interlayer, our TFC membrane with optimal SWCNTs interlayer exhibited more than three times the water permeability (A) of 3.3 L m−2h−1bar−1 in RO mode with 500 mg L−1 NaCl as feed solution and nearly three-fold higher FO water flux of 62.8 L m−2 h−1 in FO mode with the deionized water as feed solution and 1 M NaCl as draw solution. Meanwhile, the TFC membrane with SWCNTs interlayer exhibited significantly reduced membrane structure parameters (S) to immensely mitigate the effect of internal concentration polarization (ICP) in support layer with micro-sized pores in favor of higher water flux. It showed that the pure SWCNTs interlayer could be an effective strategy to apply in FO membranes.

scholarly journals Optimization of Aquaporin Loading for Performance Enhancement of Aquaporin-Based Biomimetic Thin-Film Composite Membranes

Membranes ◽  
2021 ◽  
Vol 12 (1) ◽  
pp. 32
Author(s):  
Yang Zhao ◽  
Xuesong Li ◽  
Jing Wei ◽  
Jaume Torres ◽  
Anthony G. Fane ◽  
...  
Keyword(s):  
Thin Film ◽  
Water Flux ◽  
Composite Membranes ◽  
Separation Performance ◽  
Scale Production ◽  
Film Composite ◽  
Salt Rejection ◽  
Thin Film Composite ◽  
Lipid Ratio ◽  
Wide Range

The aquaporin-based biomimetic thin-film composite membrane (ABM-TFC) has demonstrated superior separation performance and achieved successful commercialization. The larger-scale production of the ABM membrane requires an appropriate balance between the performance and manufacturing cost. This study has systematically investigated the effects of proteoliposome concentration, protein-to-lipid ratio, as well as the additive on the separation performance of ABM for the purpose of finding the optimal preparation conditions for the ABM from the perspective of industrial production. Although increasing the proteoliposome concentration or protein-to-lipid ratio within a certain range could significantly enhance the water permeability of ABMs by increasing the loading of aquaporins in the selective layer, the enhancement effect was marginal or even compromised beyond an optimal point. Alternatively, adding cholesterol in the proteoliposome could further enhance the water flux of the ABM membrane, with minor effects on the salt rejection. The optimized ABM not only achieved a nearly doubled water flux with unchanged salt rejection compared to the control, but also demonstrated satisfactory filtration stability within a wide range of operation temperatures. This study provides a practical strategy for the optimization of ABM-TFC membranes to fit within the scheme of industrial-scale production.

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