Humidity-responsive molecular gate-opening mechanism for gas separation in ultraselective nanocellulose/IL hybrid membranes

Janakiram, Saravanan; Ansaloni, Luca; Jin, Soo Ah; Yu, Xinyi; Dai, Zhongde; Spontak, Richard J.; Deng, Liyuan

doi:10.1039/d0gc00544d

Cited by 41 publications

(30 citation statements)

References 39 publications

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“…While optimum humidity promotes both CO 2 permeability and selectivity, often exceeding the upper bound Robeson limit, excessive humidity may have an adverse effect on selectivity through relaxation of the polymer network. 548 Using a nanofibrillated cellulose (NFC)-based membrane doped with 1-ethyl-3-methylimidazolium acetate ionic liquid (IL), as shown in Figure 44, Janakiram et al 182 identified three permeation regimes, depending on relative humidity. The first regime (R-I) is dominated by low permeation of semicrystalline NFC nanofibrils because the humidity level is not sufficient to swell the membrane and create continuous water channels.…”

Section: Membranesmentioning

confidence: 99%

Understanding the Effect of Water on CO₂ Adsorption

2021

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Carbon capture from large sources and ambient air is one of the most promising strategies to curb the deleterious effect of greenhouse gases. Among different technologies, CO2 adsorption has drawn widespread attention mostly because of its low energy requirements. Considering that water vapor is a ubiquitous component in air and almost all CO2-rich industrial gas streams, understanding its impact on CO2 adsorption is of critical importance. Owing to the large diversity of adsorbents, water plays many different roles from a severe inhibitor of CO2 adsorption to an excellent promoter. Water may also increase the rate of CO2 capture or have the opposite effect. In the presence of amine-containing adsorbents, water is even necessary for their long-term stability. The current contribution is a comprehensive review of the effects of water whether in the gas feed or as adsorbent moisture on CO2 adsorption. For convenience, we discuss the effect of water vapor on CO2 adsorption over four broadly defined groups of materials separately, namely (i) physical adsorbents, including carbons, zeolites and MOFs, (ii) amine-functionalized adsorbents, and (iii) reactive adsorbents, including metal carbonates and oxides. For each category, the effects of humidity level on CO2 uptake, selectivity, and adsorption kinetics under different operational conditions are discussed. Whenever possible, findings from different sources are compared, paying particular attention to both similarities and inconsistencies. For completeness, the effect of water on membrane CO2 separation is also discussed, albeit briefly.

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Section: Membranesmentioning

confidence: 99%

Understanding the Effect of Water on CO₂ Adsorption

2021

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“…94,95 Their inherently high crystallinity and hydrogen-bonding propensity promote the formation of films with excellent gasbarrier properties. 95 Lignin. Lignin is the second-most abundant polymer on Earth after cellulose, serving as structural support to cell walls.…”

Section: Manufacturingmentioning

confidence: 99%

“…Cellulose derives biobased nanomaterialsnamely, nanocellulose, including nanofibrillated cellulose (NFC), cellulose nanocrystal (CNC), and bacterial nanocellulose (BNC)are also emerging green materials for membrane fabrication. , Their inherently high crystallinity and hydrogen-bonding propensity promote the formation of films with excellent gas-barrier properties …”

Section: Biobased Polymers For Membrane Manufacturingmentioning

confidence: 99%

Toward the Next Generation of Sustainable Membranes from Green Chemistry Principles

Xie

Tiraferri

et al. 2020

ACS Sustainable Chem. Eng.

137

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Large-scale membrane technology has been widely implemented and rapidly growing for roughly 40 years. However, considering its entire life cycle, there are aspects being characterized by low sustainability, and this industry certainly cannot be defined as green. In the membrane manufacturing process, raw materials mainly rely on nonbiodegradable petroleum-based polymers and hazardous solvents. These materials are thus associated with the energy crisis and with disposal burdens at the end of their lifetime, and they pose risks to workers and the environment. Therefore, biobased polymers and green solvents should be employed within the membrane preparation process and replace traditional ones. Moreover, the wastewater generated from membrane fabrication processes contains an important amount of organic solvents and should be efficiently treated or recycled before discharge. The application of artificial intelligence in membrane manufacturing and use processes can also improve efficiency significantly. Finally, a large number of spent membrane elements should also be reused and recovered, rather than landfilled. This review critically evaluates the recent advances in methods to improve the sustainability of membrane technology, specifically emphasizing the progresses made, with regard to the above aspects. This review thus analyzes the needs for membrane industry transformations in the light of circular economy.

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“…9–11 Hence, the fabrication of ionogels for CO 2 separation has received extensive attention from researchers. 12–15…”

Section: Introductionmentioning

confidence: 99%

Spontaneous self-healing ionogels for efficient and reliable carbon dioxide separation

Chen

et al. 2022

J. Mater. Chem. A

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Humidity-responsive molecular gate-opening mechanism for gas separation in ultraselective nanocellulose/IL hybrid membranes

Abstract: A class of “green” hybrid membranes composed of nanocellulose and an ionic liquid exhibits exceptional separation properties arising from a humidity-responsive size-exclusive “gate” that allows selective CO2 permeation.

Cited by 41 publications

References 39 publications

Understanding the Effect of Water on CO₂ Adsorption

Understanding the Effect of Water on CO₂ Adsorption

Toward the Next Generation of Sustainable Membranes from Green Chemistry Principles

Spontaneous self-healing ionogels for efficient and reliable carbon dioxide separation

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Humidity-responsive molecular gate-opening mechanism for gas separation in ultraselective nanocellulose/IL hybrid membranes

Abstract: A class of “green” hybrid membranes composed of nanocellulose and an ionic liquid exhibits exceptional separation properties arising from a humidity-responsive size-exclusive “gate” that allows selective CO2 permeation.

Cited by 41 publications

References 39 publications

Understanding the Effect of Water on CO2 Adsorption

Understanding the Effect of Water on CO2 Adsorption

Toward the Next Generation of Sustainable Membranes from Green Chemistry Principles

Spontaneous self-healing ionogels for efficient and reliable carbon dioxide separation

Contact Info

Product

Resources

About

Understanding the Effect of Water on CO₂ Adsorption

Understanding the Effect of Water on CO₂ Adsorption