Gas transport characteristics of supramolecular networks of metal-coordinated highly branched Poly(ethylene oxide)

Alebrahim, Taliehsadat; Chakraborty, Alisa; Hu, Leiqing; Patil, Shalin; Cheng, Shiwang; Acharya, Durga P.; Doherty, Cara M.; Hill, Anita J.; Cook, Timothy R.; Lin, Haiqing

doi:10.1016/j.memsci.2021.120063

Cited by 13 publications

(17 citation statements)

References 57 publications

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“…9,10 Particularly, the ion-coordinated SPNs have been developed for membrane gas separations, 11,12 such as polyMOFs, 13−15 metal-induced ordered microporous polymers, 16 and ioncoordinated poly(ethylene oxide). 17,18 For example, Cu 2+ or Zn 2+ ions were used to induce the formation of ordered microstructures in amine-containing polymers, rendering superior CO 2 /N 2 separation properties. 16 Hydrogen has emerged as an important clean energy carrier, and most H 2 is currently produced from fossil fuels with CO 2 as a byproduct.…”

Section: Introductionmentioning

confidence: 99%

“…Supramolecular polymer networks (SPNs) comprising polymers coordinated by ions have been widely explored for various applications, such as self-healing, , stimuli-responsive materials, , catalysts, , and liquid separations. , The noncovalent interactions between the ions and polymers can enhance the packing efficiency of the polymer chains, increasing the size-sieving ability and mechanical properties. , Particularly, the ion-coordinated SPNs have been developed for membrane gas separations, , such as polyMOFs, − metal-induced ordered microporous polymers, and ion-coordinated poly(ethylene oxide). , For example, Cu 2+ or Zn 2+ ions were used to induce the formation of ordered microstructures in amine-containing polymers, rendering superior CO 2 /N 2 separation properties …”

Section: Introductionmentioning

confidence: 99%

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Supramolecular Polymer Networks of Ion-Coordinated Polybenzimidazole with Simultaneously Improved H₂ Permeability and H₂/CO₂ Selectivity

Fan

Huang

et al. 2022

Macromolecules

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Cross-linking polymers using covalent bonds often improves polymer chain packing efficiency and thus molecular sizesieving ability but decreases gas permeability. Herein, we demonstrate that supramolecular polymer networks (SPNs) comprising polybenzimidazole (PBI) and dissociable metal salts (including palladium trifluoroacetate and nickel trifluoroacetate) display unusual behavior of breaking the permeability/selectivity tradeoff for H 2 /CO 2 separation. With metal ions coordinating the imidazole rings on PBI chains and trifluoroacetate anions plasticizing the PBI chains, the SPNs achieve higher fractional free volumes yet lower d-spacing than PBI, simultaneously increasing H 2 permeability and H 2 /CO 2 selectivity. For instance, doping PBI with 13.7 mass% nickel trifluoroacetate increases H 2 permeability by 82%, from 34 to 62 Barrer, and H 2 /CO 2 selectivity from 10 to 15 at 150 °C. The SPNs also exhibit mechanical properties superior to PBI and stable mixed-gas H 2 /CO 2 separation performance in the presence of water vapor. This study unveils a facile approach to design materials exhibiting small but dense free volume elements and thereby achieving high gas permeability and selectivity.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Supramolecular Polymer Networks of Ion-Coordinated Polybenzimidazole with Simultaneously Improved H₂ Permeability and H₂/CO₂ Selectivity

Fan

Huang

et al. 2022

Macromolecules

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“…Figure b exhibits the superior pure-gas CO 2 /N 2 separation property of the MMMs containing low loadings of MOP-3 in Robeson’s upper bound plot. ,, PolyPDXLA/MOP-3 exhibits CO 2 /N 2 separation properties close to the 2019 upper bound, indicating their promise for industrial applications.…”

Section: Resultsmentioning

confidence: 89%

“…Gas sorption in MMMs was determined using a gravimetric method with an IGA 001 microbalance (Hiden Isochema, Warrington, U.K.) at 35 °C and three pressures (4.5, 7.9, and 11.4 bar). ,, Gas sorption reached equilibrium when the sample mass was stable for at least 1 h, and the average mass in the last hour was used to calculate the gas solubility. The gas solubility and diffusivity have an uncertainty of <10 and <14%, respectively, estimated using the propagation analysis of error …”

Section: Experimental Sectionmentioning

confidence: 99%

Low-Loading Mixed Matrix Materials: Fractal-Like Structure and Peculiarly Enhanced Gas Permeability

Alebrahim,

Huang,

Welgama

et al. 2024

ACS Appl. Mater. Interfaces

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Mixed matrix materials (MMMs) containing metal−organic framework (MOF) nanoparticles are attractive for membrane carbon capture. Particularly, adding <5 mass % MOFs in polymers dramatically increased gas permeability, far surpassing the Maxwell model's prediction. However, no sound mechanisms have been offered to explain this unusual lowloading phenomenon. Herein, we design an ideal series of MMMs containing polyethers (one of the leading polymers for CO 2 /N 2 separation) and discrete metal−organic polyhedra (MOPs) with cage sizes of 2−5 nm. Adding 3 mass % MOP-3 in a polyether increases the CO 2 permeability by 100% from 510 to 1000 Barrer at 35 °C because of the increased gas diffusivity. No discernible changes in typical physical properties governing gas transport properties are detected, such as glass transition temperature, fractional free volume, d-spacing, etc. We hypothesize that this behavior is attributed to fractal-like networks formed by highly porous MOPs, and for the first time, we validate this hypothesis using small-angle X-ray scattering analysis.

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“…Electrostatic interactions are another means of assembling metal nanoparticles on solid supports [ 78 ]. This can be achieved by employing polymers as adhesives, e.g., polyelectrolytes [ 79 ], polyvinyl pyrrolidone (PVP) [ 80 ], polyvinyl pyridine [ 81 ], and polystyrene [ 82 ]. Biomolecules, such as DNA [ 83 ] and proteins [ 84 ], are used as linkers, sometimes acting as recognition elements.…”

Section: Applications Of Sers In Drug Detectionmentioning

confidence: 99%

Recent Advances in the Use of Surface-Enhanced Raman Scattering for Illicit Drug Detection

Azimi¹,

Docoslis²

2022

Sensors

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The rapid increase in illicit drug use and its adverse health effects and socio-economic consequences have reached alarming proportions in recent years. Surface-enhanced Raman scattering (SERS) has emerged as a highly sensitive analytical tool for the detection of low dosages of drugs in liquid and solid samples. In the present article, we review the state-of-the-art use of SERS for chemical analysis of illicit drugs in aqueous and complex biological samples, including saliva, urine, and blood. We also include a review of the types of SERS substrates used for this purpose, pointing out recent advancements in substrate fabrication towards quantitative and qualitative detection of illicit drugs. Finally, we conclude by providing our perspective on the field of SERS-based drug detection, including presently faced challenges. Overall, our review provides evidence of the strong potential of SERS to establish itself as both a laboratory and in situ analytical method for fast and sensitive drug detection and identification.

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Gas transport characteristics of supramolecular networks of metal-coordinated highly branched Poly(ethylene oxide)

Cited by 13 publications

References 57 publications

Supramolecular Polymer Networks of Ion-Coordinated Polybenzimidazole with Simultaneously Improved H₂ Permeability and H₂/CO₂ Selectivity

Supramolecular Polymer Networks of Ion-Coordinated Polybenzimidazole with Simultaneously Improved H₂ Permeability and H₂/CO₂ Selectivity

Low-Loading Mixed Matrix Materials: Fractal-Like Structure and Peculiarly Enhanced Gas Permeability

Recent Advances in the Use of Surface-Enhanced Raman Scattering for Illicit Drug Detection

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Gas transport characteristics of supramolecular networks of metal-coordinated highly branched Poly(ethylene oxide)

Cited by 13 publications

References 57 publications

Supramolecular Polymer Networks of Ion-Coordinated Polybenzimidazole with Simultaneously Improved H2 Permeability and H2/CO2 Selectivity

Supramolecular Polymer Networks of Ion-Coordinated Polybenzimidazole with Simultaneously Improved H2 Permeability and H2/CO2 Selectivity

Low-Loading Mixed Matrix Materials: Fractal-Like Structure and Peculiarly Enhanced Gas Permeability

Recent Advances in the Use of Surface-Enhanced Raman Scattering for Illicit Drug Detection

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Product

Resources

About

Supramolecular Polymer Networks of Ion-Coordinated Polybenzimidazole with Simultaneously Improved H₂ Permeability and H₂/CO₂ Selectivity

Supramolecular Polymer Networks of Ion-Coordinated Polybenzimidazole with Simultaneously Improved H₂ Permeability and H₂/CO₂ Selectivity