Ultrathin poly (vinyl alcohol)/MXene nanofilm composite membrane with facile intrusion-free construction for pervaporative separations

Yang, Guang; Xie, Zongli; Thornton, Aaron W.; Doherty, Cara M.; Ding, Mingmei; Xu, Hang; Cran, Marlene; Ng, Derrick Wing Kwan; Gray, Stephen

doi:10.1016/j.memsci.2020.118490

Cited by 32 publications

(25 citation statements)

References 65 publications

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“…As the amount of MXene increased from 0 to 3.0 wt %, total flux decreased from 97 to 75 g/m 2 × h and the separation factor increased from 144 to 2585, again suggesting an optimum MXene content in MMMs which was related to the improved crosslinking density. A greater separation factor was reported by Yang et al 202 for Ti 3 C 2 T x /PVA MMM cross-linked with sulfosuccinic acid (SFA). MMM including 20 wt % SFA and 2 wt % MXene revealed water content in the permeate as 97.6, 99.5, 99.7, and 99.9 wt % with separation factors of 968, 4738, 7913, and 23,786 for methanol, ethanol, isopropanol, and tertbutanol aqueous solutions, respectively.…”

Section: Solvent Dehydrationmentioning

confidence: 95%

Can MXene be the Effective Nanomaterial Family for the Membrane and Adsorption Technologies to Reach a Sustainable Green World?

Massoumılari

Velioğlu

2023

ACS Omega

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Environmental pollution has intensified and accelerated due to a steady increase in the number of industries, and exploring methods to remove hazardous contaminants, which can be typically divided into inorganic and organic compounds, have become inevitable. Therefore, the development of efficacious technology for the separation processes is of paramount importance to ensure the environmental remediation. Membrane and adsorption technologies garnered attention, especially with the use of novel and high performing nanomaterials, which provide a target-specific solution. Specifically, widespread use of MXene nanomaterials in membrane and adsorption technologies has emerged due to their intriguing characteristics, combined with outstanding separation performance. In this review, we demonstrated the intrinsic properties of the MXene family for several separation applications, namely, gas separation, solvent dehydration, dye removal, separation of oil-in-water emulsions, heavy metal ion removal, removal of radionuclides, desalination, and other prominent separation applications. We highlighted the recent advancements used to tune separation potential of the MXene family such as the manipulation of surface chemistry, delamination or intercalation methods, and fabrication of composite or nanocomposite materials. Moreover, we focused on the aspects of stability, fouling, regenerability, and swelling, which deserve special attention when the MXene family is implemented in membrane and adsorption-based separation applications.

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Section: Solvent Dehydrationmentioning

confidence: 95%

Can MXene be the Effective Nanomaterial Family for the Membrane and Adsorption Technologies to Reach a Sustainable Green World?

Massoumılari

Velioğlu

2023

ACS Omega

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“…In Figure 4b, the characteristic peaks at 19.5 were attributed to the (101) plane of the PVA matrix. 48,49 By calculating the lattice parameter of the membranes, it was found that d spacing of the PVA molecular chain decreased gradually after the addition of the SSA and MXene. The crosslinking between the PVA molecular chains and the SSA molecules was stronger than that between two PVA molecule chains.…”

Section: Structural Characterization Of the Pva Mmmsmentioning

confidence: 99%

Hypergravity field induced self‐assembly of 2D MXene in polyvinyl alcohol membrane matrix and its improvement of alcohol/water pervaporation

Pan

et al. 2023

J of Applied Polymer Sci

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Hydrophilic nanomaterials were always used to improve the pervaporation (PV) performance of polyvinyl alcohol (PVA) membrane in the process of ethanol dehydration. In this work, the PVA/MXene composite membrane with high water flux and separation factor was fabricated with spin coating method.Induced by the hypergravity force, the MXene nanosheets were segregated and stacked layer-by-layer between the interface of the PVA/MXene layer and the support. The self-assembly 2D MXene in the PVA not only improved the binding force between the separation layer and the support but also enhanced the PV performance. The water flux and separation factor of the PVA/SSA/MXene composite membrane reached 1.22 kgÁm À2 Áh À1 and 1577, respectively. Both were higher than those of most reported PVA membranes. Nano indentation and scratch tests also revealed that due to the high modulus and hardness of the PVA/SSA/MXene composite membrane, 0.2822 and 0.019 GPa, strong binding force was existed between the separation layer and the support. Partly based on this reason, the structure of the PVA/SSA/MXene composite membrane remained stable during 300 hours of the PV test. It is believed that the prepared PVA/SSA/MXene composite membrane has a broad application prospect in the PV process for ethanol dehydration.

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“…Similarly, layered atomic structures constructed on covalent bonding and evenly distributed functional groups such as –OH, –O–, and –F impart MXene with excellent mechanical rigidity and thermal stability, and they have shown great promise as nanofillers in polymer-based membranes for gas separation [ 22 ]. Thus, the rational design of MXene-based membranes has dramatically improved over the last few years.…”

Section: Introductionmentioning

confidence: 99%

Cellulose Triacetate-Based Mixed-Matrix Membranes with MXene 2D Filler—CO2/CH4 Separation Performance and Comparison with TiO2-Based 1D and 0D Fillers

et al. 2022

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Mixed-matrix membranes (MMMs) possess the unique properties and inherent characteristics of their component polymer and inorganic fillers, or other possible types of additives. However, the successful fabrication of compact and defect-free MMMs with a homogeneous filler distribution poses a major challenge, due to poor filler/polymer compatibility. In this study, we use two-dimensional multi-layered Ti3C2Tx MXene nanofillers to improve the compatibility and CO2/CH4 separation performance of cellulose triacetate (CTA)-based MMMs. CTA-based MMMs with TiO2-based 1D (nanotubes) and 0D (nanofillers) additives were also fabricated and tested for comparison. The high thermal stability, compact homogeneous structure, and stable long-term CO2/CH4 separation performance of the CTA-2D samples suggest the potential application of the membrane in bio/natural gas separation. The best results were obtained for the CTA-2D sample with a loading of 3 wt.%, which exhibited a 5-fold increase in CO2 permeability and 2-fold increase in CO2/CH4 selectivity, compared with the pristine CTA membrane, approaching the state-of-the-art Robeson 2008 upper bound. The dimensional (shape) effect on separation performance was determined as 2D > 1D > 0D. The use of lamellar stacked MXene with abundant surface-terminating groups not only prevents the aggregation of particles but also enhances the CO2 adsorption properties and provides additional transport channels, resulting in improved CO2 permeability and CO2/CH4 selectivity.

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Ultrathin poly (vinyl alcohol)/MXene nanofilm composite membrane with facile intrusion-free construction for pervaporative separations

Cited by 32 publications

References 65 publications

Can MXene be the Effective Nanomaterial Family for the Membrane and Adsorption Technologies to Reach a Sustainable Green World?

Can MXene be the Effective Nanomaterial Family for the Membrane and Adsorption Technologies to Reach a Sustainable Green World?

Hypergravity field induced self‐assembly of 2D MXene in polyvinyl alcohol membrane matrix and its improvement of alcohol/water pervaporation

Cellulose Triacetate-Based Mixed-Matrix Membranes with MXene 2D Filler—CO2/CH4 Separation Performance and Comparison with TiO2-Based 1D and 0D Fillers

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