Novel thin-film nanocomposite membranes filled with multi-functional Ti 3 C 2 T x nanosheets for task-specific solvent transport

Hao, Lan; Zhang, Haoqin; Wu, Xiaoli; Zhang, Jiakui; Wang, Jingtao; Li, Yifan

doi:10.1016/j.compositesa.2017.05.003

Cited by 100 publications

(70 citation statements)

References 55 publications

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“…With respect to silane coupling agents possessing amine functional groups, Hao et al used (3‐aminopropyl)triethoxysilane (APTES) to functionalize the surface of Ti 3 C 2 T x for thin‐film membranes in polyacrylonitrile (PAN) or polydimethylsiloxane (PDMS) matrix, which showed strong enhancement in flux and selectivity for alcohol‐based solvents . Kumar et al also used APTES to functionalize the surface of Ti 3 C 2 T x for the detection of cancer biomarkers .…”

Section: Introductionmentioning

confidence: 99%

Surface Modification of a MXene by an Aminosilane Coupling Agent

Riazi

Anayee

Hantanasirisakul

et al. 2020

Adv Materials Inter

186

119

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MXenes, two‐dimensional (2D) transition metal carbides and/or nitrides, possess surface termination groups such as hydroxyl, oxygen, and fluorine, which are available for surface functionalization. Their surface chemistry is critical in many applications. This article reports amine functionalization of Ti3C2Tx MXene surface with [3‐(2‐aminoethylamino)‐propyl]trimethoxysilane (AEAPTMS). Characterization techniques such as X‐ray photoelectron spectroscopy verify the success of the surface functionalization and confirm that the silane coupling agent bonds to Ti3C2Tx surface both physically and chemically. The functionalization changes the MXene surface charge from −35 to +25 mV at neutral pH, which allows for in situ preparation of self‐assembled films. Further, surface charge measurements of the functionalized MXene at different pH values show that the functionalized MXene has an isoelectric point at a pH around 10.7, and the highest reported positive surface charge of +62 mV at a pH of 2.58. Furthermore, the existence of a mixture of different orientations of AEAPTMS and the simultaneous presence of protonated and free amine groups on the surface of Ti3C2Tx are demonstrated. The availability of free amine groups on the surface potentially permits the fabrication of crosslinked electrically conductive MXene/epoxy composites, dye adsorbents, high‐performance membranes, and drug carriers. Surface modifications of this type are applicable to many other MXenes.

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Section: Introductionmentioning

confidence: 99%

Surface Modification of a MXene by an Aminosilane Coupling Agent

Riazi

Anayee

Hantanasirisakul

et al. 2020

Adv Materials Inter

186

119

View full text Add to dashboard Cite

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“…[75][76][77][78] Beyond that, by leveraging silanol chemistry on OH groups, the Ti 3 C 2 T x nanosheets were also grafted with organosiloxanes to give a multitude of functional groups including NH 2 , COOR, C 6 H 6 , and C 12 H 26 . [79] These efforts not only confirm the feasibility of wettability tuning for MXene-based materials but also demonstrate the chemical versatility of MXenes, which is desirable for membrane development.…”

Section: Solution Processabilitymentioning

confidence: 71%

“…[5] Thus, successful fabrication of Ti 3 C 2 T x -based MMMs using various polymers (as matrix) had been reported for effective purification of water and organic solvents. [79,84,96,97] The roles played by MXene fillers in the MMMs can range from leveraging the 2D morphology and narrow interlayer spacing for size exclusion, lengthening diffusion pathways for realizing selective solute transport, and tuning surface chemistries for promoting facilitated transport to altering the packing of polymer chains for enhancing mechanical properties and separation performances. In retrospect, these roles are not distinctly different from those played by other 2DM fillers (see ref.…”

Section: Mixed-matrix Membranesmentioning

confidence: 99%

“…Owing to their high solvent resistance, MXenes are promising for the purification of organic solvents. [75,79,109] With their elastic moduli at around 260-440 GPa, which is comparable to that of GO (≈110-420 GPa), MXenes are useful for obtaining highly robust membranes. [25,129] In addition, it is possible to limit the solvent uptake and swelling of MXene-filled membranes for different solvents by functionalization.…”

Section: Organic Solvent Purificationmentioning

confidence: 99%

“…For example, Ti 3 C 2 T x -NH 2 and Ti 3 C 2 T x -COOR derivatives have inhibited solvent uptake and swelling (of PEI-and PDMS-based membranes) more efficiently against nonpolar solvents (e.g., toluene or n-heptane), while alkyl-modified derivatives (Ti 3 C 2 T x -C 6 H 6 and Ti 3 C 2 T x -C 12 H 26 ) performed better with polar solvents (e.g., isopropanol or ethyl acetate). [79] As such, MXenes attracted growing attention for organic solvent nanofiltration (OSN) as well as pervaporation of solvent mixtures, both of which demand highly stable membranes under long-term exposure to organic solvents.…”

Section: Organic Solvent Purificationmentioning

confidence: 99%

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MXene Materials for Designing Advanced Separation Membranes

et al. 2020

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MXenes are emerging rapidly as a new family of multifunctional nanomaterials with prospective applications rivaling that of graphenes. Herein, a timely account of the design and performance evaluation of MXene‐based membranes is provided. First, the preparation and physicochemical characteristics of MXenes are outlined, with a focus on exfoliation, dispersion stability, and processability, which are crucial factors for membrane fabrication. Then, different formats of MXene‐based membranes in the literature are introduced, comprising pristine or intercalated nanolaminates and polymer‐based nanocomposites. Next, the major membrane processes so far pursued by MXenes are evaluated, covering gas separation, wastewater treatment, desalination, and organic solvent purification. The potential utility of MXenes in phase inversion and interfacial polymerization, as well as layer‐by‐layer assembly for the preparation of nanocomposite membranes, is also critically discussed. Looking forward, exploiting the high electrical conductivity and catalytic activity of certain MXenes is put into perspective for niche applications that are not easily achievable by other nanomaterials. Furthermore, the benefits of simulation/modeling approaches for designing MXene‐based membranes are exemplified. Overall, critical insights are provided for materials science and membrane communities to navigate better while exploring the potential of MXenes for developing advanced separation membranes.

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MXene‐Based Polymer Composite Membranes for Pervaporation and Gas Separation

Manobalan,

Sumangala

2024

MXene Reinforced Polymer Composites

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Novel thin-film nanocomposite membranes filled with multi-functional Ti 3 C 2 T x nanosheets for task-specific solvent transport

Cited by 100 publications

References 55 publications

Surface Modification of a MXene by an Aminosilane Coupling Agent

Surface Modification of a MXene by an Aminosilane Coupling Agent

MXene Materials for Designing Advanced Separation Membranes

MXene‐Based Polymer Composite Membranes for Pervaporation and Gas Separation

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