Inkjet printed single walled carbon nanotube as an interlayer for high performance thin film composite nanofiltration membrane

Park, Myoung Jun; Wang, Chen; Seo, Dong Han; Gonzales, Ralph Rolly; Matsuyama, Hideto; Shon, Ho Kyong

doi:10.1016/j.memsci.2020.118901

Cited by 50 publications

(28 citation statements)

References 29 publications

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“…The rejection efficiencies of CGOPVA-50 at 5 bars for other salts (Figure 8c) showed that the composite membrane was most effective for Na 2 SO 4 , followed by MgSO 4 , then NaCl and, lastly, for MgCl 2 . This trend is typically observed with negatively charged nanofiltration membranes [47,55]. The CGOPVA-50 membrane had a highly negative charged surface, as confirmed by the zeta potential measurement (Figure 5c).…”

Section: Nf Performance Of Gopva and Cgopva Membranessupporting

confidence: 71%

“…Attenuated total reflectance-Fourier-transform infrared spectroscopy (ATR-FTIR) (IRAffinity-1, Shimadzu, Kyoto, Japan) and X-ray photoelectron spectroscopy (XPS) were also conducted to confirm the successful reaction of GA cross-linking. Additionally, membrane surface chemistry was characterized by zeta potential measurement using an Anton Paar Surpass solid-surface analysis, following the conditions reported in a previous study [47]. X-ray diffraction (XRD, Bruker D8) data were acquired with CuKα radiation (λ = 1.5418 Å) to determine the GO interlayer distances (d-spacing) of GO-PVA composite membranes in dry and wet states.…”

Section: Membrane Characterizationmentioning

confidence: 99%

“…The stability of the GO-selective layer on GOPVA-50 and CGOPVA-50 composite membranes was evaluated using the ultrasonication method. This test has been commonly used to evaluate the stability of GO membranes [30,[47][48][49]. The membrane samples were first soaked in DI water and then ultrasonicated at 230 W from 0 to 30 min.…”

Section: Evaluation Of Membrane Stability and Reusabilitymentioning

confidence: 99%

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Chemically Cross-Linked Graphene Oxide as a Selective Layer on Electrospun Polyvinyl Alcohol Nanofiber Membrane for Nanofiltration Application

et al. 2021

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Graphene oxide (GO) nanosheets were utilized as a selective layer on a highly porous polyvinyl alcohol (PVA) nanofiber support via a pressure-assisted self-assembly technique to synthesize composite nanofiltration membranes. The GO layer was rendered stable by cross-linking the nanosheets (GO-to-GO) and by linking them onto the support surface (GO-to-PVA) using glutaraldehyde (GA). The amounts of GO and GA deposited on the PVA substrate were varied to determine the optimum nanofiltration membrane both in terms of water flux and salt rejection performances. The successful GA cross-linking of GO interlayers and GO-PVA via acetalization was confirmed by FTIR and XPS analyses, which corroborated with other characterization results from contact angle and zeta potential measurements. Morphologies of the most effective membrane (CGOPVA-50) featured a defect-free GA cross-linked GO layer with a thickness of ~67 nm. The best solute rejections of the CGOPVA-50 membrane were 91.01% for Na2SO4 (20 mM), 98.12% for Eosin Y (10 mg/L), 76.92% for Methylene blue (10 mg/L), and 49.62% for NaCl (20 mM). These findings may provide one of the promising approaches in synthesizing mechanically stable GO-based thin-film composite membranes that are effective for solute separation via nanofiltration.

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Section: Nf Performance Of Gopva and Cgopva Membranessupporting

confidence: 71%

Section: Membrane Characterizationmentioning

confidence: 99%

Section: Evaluation Of Membrane Stability and Reusabilitymentioning

confidence: 99%

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Chemically Cross-Linked Graphene Oxide as a Selective Layer on Electrospun Polyvinyl Alcohol Nanofiber Membrane for Nanofiltration Application

et al. 2021

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Section: Introductionmentioning

confidence: 99%

“…Internal concentration polarization (ICP) is a major factor influencing the membrane performance during FO operation [16,21,22]. ICP is related to the substrate structural parameter and chemical properties of the support layer [22]. Moreover, previous studies suggested that a substrate with finger-like morphology is ideal to have high water flux and to decrease the ICP, due to a direct path for water molecules and lower resistance [15].…”

Section: Introductionmentioning

confidence: 99%

Developing a Thin Film Composite Membrane with Hydrophilic Sulfonated Substrate on Nonwoven Backing Fabric Support for Forward Osmosis

et al. 2021

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This study describes the fabrication of sulfonated polyethersulfone (SPES) as a super-hydrophilic substrate for developing a composite forward osmosis (FO) membrane on a nonwoven backing fabric support. SPES was prepared through an indirect sulfonation procedure and then blended with PES at a certain ratio. Applying SPES as the substrate affected membrane properties, such as porosity, total thickness, morphology, and hydrophilicity. The PES-based FO membrane with a finger-like structure had lower performance in comparison with the SPES based FO membrane having a sponge-like structure. The finger-like morphology changed to a sponge-like morphology with the increase in the SPES concentration. The FO membrane based on a more hydrophilic substrate via sulfonation had a sponge morphology and showed better water flux results. Water flux of 26.1 L m−2 h−1 and specific reverse solute flux of 0.66 g L−1 were attained at a SPES blend ratio of 50 wt.% when 3 M NaCl was used as the draw solution and DI water as feed solution under the FO mode. This work offers significant insights into understanding the factors affecting FO membrane performance, such as porosity and functionality.

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Metal‐Organic Frameworks and Electrospinning: A Happy Marriage for Wastewater Treatment

Ahmadijokani

Molavi

Bahi

et al. 2022

Adv Funct Materials

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Metal-organic frameworks (MOFs), an emerging class of porous organic-inorganic hybrid materials, have shown great potential for water and wastewater treatment applications. However, pure MOF powders have limited practical applications in water treatment due to their insolubility, poor processability, brittleness, safety hazard from dust formation, and difficult separation from aqueous solutions. Thus, exploring potential MOFs composites with improved separation performance is of great importance. The marriage of MOFs with electrospun nanofiber with forethought into the final product's morphology, structure, and chemistry has opened up new opportunities for efficient wastewater treatment. The present review exhaustively summarizes the strategies to integrate MOFs into nanofibers via electrospinning to remove various pollutants (i.e., organic dyes, heavy metal ions, pharmaceuticals, personal care products, oily compounds, organic solvents, etc.) via adsorption, photodegradation, and membrane filtration. Besides, the most recent advances of electrospun MOF nanofibers for wastewater treatment and their current challenges and future outlook are delineated.

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Inkjet printed single walled carbon nanotube as an interlayer for high performance thin film composite nanofiltration membrane

Cited by 50 publications

References 29 publications

Chemically Cross-Linked Graphene Oxide as a Selective Layer on Electrospun Polyvinyl Alcohol Nanofiber Membrane for Nanofiltration Application

Chemically Cross-Linked Graphene Oxide as a Selective Layer on Electrospun Polyvinyl Alcohol Nanofiber Membrane for Nanofiltration Application

Developing a Thin Film Composite Membrane with Hydrophilic Sulfonated Substrate on Nonwoven Backing Fabric Support for Forward Osmosis

Metal‐Organic Frameworks and Electrospinning: A Happy Marriage for Wastewater Treatment

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