Constructing Dual-Transport Pathways by Incorporating Beaded Nanofillers in Mixed Matrix Membranes for Efficient CO<sub>2</sub> Separation

Lv, Xia; Ding, Siyuan; Huang, Lu; Li, Xueqin; Zhang, Jinli

doi:10.1021/acsami.2c15905

Cited by 14 publications

(3 citation statements)

References 57 publications

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“…A MMM is a filler introduced into a polymer matrix . MMMs have a potential to overcome Robeson upper bound’s restriction due to the advantages of a multifunctional filler. − In particular, because of their high porosity, adaptable pore sizes, and design flexibility, IL/MOF composites are the best choice for MMM applications. , Therefore, the introduction of IL/MOF composites into MMMs affords high permeability and selectivity, along with improved separation performance.…”

Section: Il/mof Composites For Membrane Separationmentioning

confidence: 99%

Ionic Liquids Functionalized MOFs for Adsorption

et al. 2023

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Metal–organic frameworks (MOFs) and ionic liquids (ILs) represent promising materials for adsorption separation. ILs incorporated into MOF materials (denoted as IL/MOF composites) have been developed, and IL/MOF composites combine the advantages of MOFs and ILs to achieve enhanced performance in the adsorption-based separation of fluid mixtures. The designed different ILs are introduced into the various MOFs to tailor their functional properties, which affect the optimal adsorptive separation performance. In this Perspective, the rational fabrication of IL/MOF composites is presented, and their functional properties are demonstrated. This paper provides a critical overview of an emergent class of materials termed IL/MOF composites as well as the recent advances in the applications of IL/MOF composites as adsorbents or membranes in fluid separation. Furthermore, the applications of IL/MOF in adsorptive gas separations (CO2 capture from flue gas, natural gas purification, separation of acetylene and ethylene, indoor pollutants removal) and liquid separations (separation of bioactive components, organic-contaminant removal, adsorptive desulfurization, radionuclide removal) are discussed. Finally, the existing challenges of IL/MOF are highlighted, and an appropriate design strategy direction for the effective exploration of new IL/MOF adsorptive materials is proposed.

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Section: Il/mof Composites For Membrane Separationmentioning

confidence: 99%

Ionic Liquids Functionalized MOFs for Adsorption

et al. 2023

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“…Biogas is one of the most readily available and widespread renewable energies, and it is usually obtained from the decomposition of biodegradable waste. − Biogas has been expected to replace the conventional fossil fuel . However, CO 2 in biogas not only causes corrosion of equipment and pipelines but also greatly reduces the calorific value of biogas. − Hence, it is required to take CO 2 out of biogas.…”

Section: Introductionmentioning

confidence: 99%

“…1−3 Biogas has been expected to replace the conventional fossil fuel. 4 However, CO 2 in biogas not only causes corrosion of equipment and pipelines but also greatly reduces the calorific value of biogas. 5−8 Hence, it is required to take CO 2 out of biogas.…”

Section: Introductionmentioning

confidence: 99%

Low-Resistance Transport Pathways in POSS/CPBI Mixed Matrix Membranes for Efficient CO₂ Separation

Kang

Wang

et al. 2023

ACS Appl. Nano Mater.

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An amino-functionalized polyhedral oligomeric silsesquioxane (NH2-POSS) was grafted onto molecular chains of a chlorinated alkane-activated polybenzimidazole (CPBI) matrix to fabricate mixed matrix membranes (MMMs) for highly efficient CO2/CH4 separation. The nanocages NH2-POSS contributed significantly to the improvement of the CO2 separation performance. The following explanations were given as the primary causes: first, the nanocages NH2-POSS constructed low-resistance transport pathways for accelerating CO2 transport in MMMs. Second, the amino groups of NH2-POSS provided carriers for CO2, benefiting the improvement of CO2 selectivity. Moreover, the introduced nanocages NH2-POSS reduced the face to face packing and strong hydrogen bonding between CPBI molecule chains to enhance CO2 permeability. As a result, the CO2/CH4 separation performance of CPBI/NH2-POSS MMMs was significantly improved. In particular, compared with the pure CPBI membrane, the CO2 permeability and CO2/CH4 separation factor of CPBI/NH2-POSS-6 MMM were increased by 196.9 and 248.2%, respectively. This work suggested that an efficient strategy for CO2/CH4 separation involved the construction of low-resistance transport pathways by nanocage fillers.

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Regulating the Positive Localized Electric Field in Mixed Matrix Membranes by Charge Reversal of ILs‐COF for Boosting CO₂ Separation

Liang,

Zhang,

et al. 2024

Adv Funct Materials

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Covalent organic frameworks (COFs), characterized by their high porosity and stability, hold great potential for applications in gas separations. However, achieving precise size sieving without hindering the gas diffusion rate is challenging. This study presents a novel approach to establishing tunable localized electric fields in COF channels to achieve efficient CO2 separation in Pebax‐based mixed matrix membranes (MMMs). Different charge densities of the localized electric field are achieved by the host–guest interaction between COF and varying charged ionic liquids (ILs). Remarkably, the MMM with a positive localized electric field attains the optimal CO2/CH4 separation performance with a significantly enhanced permeability (≈38%) and selectivity (≈99%), surpassing the Robeson upper bound. Through density functional theory (DFT) calculations, the enhanced CO2/CH4 selectivity of MMM is due to the “sieving effect” of a positive localized electric field on CO2 over CH4. Specifically, the negatively charged O atom in CO2 exhibits stronger electrostatic interaction than the positively charged H atom of CH4. Therefore, the strategy of regulating the localized electric field can be employed as an efficient design for CO2 separation in MMMs.

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Constructing Dual-Transport Pathways by Incorporating Beaded Nanofillers in Mixed Matrix Membranes for Efficient CO₂ Separation

Cited by 14 publications

References 57 publications

Ionic Liquids Functionalized MOFs for Adsorption

Ionic Liquids Functionalized MOFs for Adsorption

Low-Resistance Transport Pathways in POSS/CPBI Mixed Matrix Membranes for Efficient CO₂ Separation

Regulating the Positive Localized Electric Field in Mixed Matrix Membranes by Charge Reversal of ILs‐COF for Boosting CO₂ Separation

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Constructing Dual-Transport Pathways by Incorporating Beaded Nanofillers in Mixed Matrix Membranes for Efficient CO2 Separation

Cited by 14 publications

References 57 publications

Ionic Liquids Functionalized MOFs for Adsorption

Ionic Liquids Functionalized MOFs for Adsorption

Low-Resistance Transport Pathways in POSS/CPBI Mixed Matrix Membranes for Efficient CO2 Separation

Regulating the Positive Localized Electric Field in Mixed Matrix Membranes by Charge Reversal of ILs‐COF for Boosting CO2 Separation

Contact Info

Product

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Constructing Dual-Transport Pathways by Incorporating Beaded Nanofillers in Mixed Matrix Membranes for Efficient CO₂ Separation

Low-Resistance Transport Pathways in POSS/CPBI Mixed Matrix Membranes for Efficient CO₂ Separation

Regulating the Positive Localized Electric Field in Mixed Matrix Membranes by Charge Reversal of ILs‐COF for Boosting CO₂ Separation