Aqueous Synthesis of Compressible and Thermally Stable Cellulose Nanofibril–Silica Aerogel for CO<sub>2</sub> Adsorption

Jiang, Feng; Hu, Shengquan; Hsieh, You‐Lo

doi:10.1021/acsanm.8b01515

Cited by 43 publications

(26 citation statements)

References 54 publications

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“…1c and d), thus having a very high aspect ratio and specific surface. Furthermore, these CNF surfaces are amphiphilic, allowing their self-assembling into unique aerogels of super low density (2-8 mg cm À 3 ), ultra-high porosity (>99.5%), high specific surface area (123 m 2 g À 1 ) with a 0.37 cm 3 g -1 pore volume, and wet-resilience while retaining amphiphilicity [8,14,15,[17][18][19][20]. Thermal insulation is among many of the diverse potential applications of these CNF aerogels.…”

Section: Introductionmentioning

confidence: 99%

Nanocellulose aerogel-based porous coaxial fibers for thermal insulation

2020

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Strong, continuous, and highly porous coaxial fibers with cellulose nanofibril (CNF) aerogel core and celluloserich sheath were fabricated by wet-spinning hollow fibers and infusing them with aerogel precursor for highperformance thermal insulators. The sheath contained multiscale pores, including microvoids (14.5 μm) and sub-micron pores (133 nm) in bulk, as well as ca. 25-26 nm surface nanopores, to function as a template and protective sheath for the microporous CNF aerogel core. The porous coaxial fibers had many desirable qualities, including low density (0.2 g cm 3), high porosity (85%), high specific tensile strength (23.5 � 2.5 MPa g cm À 3), wide working temperatures (À 20 to 150 � C), continuous and large-scale producibility, as well as biodegradability. The unique combination of multiscale porous sheath and ultra-low density aerogel core synergistically minimizes heat conductivity by all three mechanisms, i.e., restrain air circulation to limit convective heat transfer, while the poor conducting cellulose permitting little conductive heat transfer and the highly crystalline aerogel cellular walls prohibit infrared radiation, effectively suppresses radiative heat transfer under extreme temperatures.

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Section: Introductionmentioning

confidence: 99%

Nanocellulose aerogel-based porous coaxial fibers for thermal insulation

2020

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“…At 101.33 kPa and at 25 and 35°C, the CO 2 adsorption capacity of the modified CNC aerogel was up to 2.57 and 2.05 mmol CO 2 g −1 absorbent. They were at least 35% higher than the previously reported ones (1.5–1.9 mmol g −1 ) of the nanocellulose‐based aerogels 9,14,34 . Additionally, Figure 8(a) displayed the CO 2 adsorption capacity of the modified CNC aerogel increased by more than 7 folds in comparison to the one of the pristine in the range of pressure.…”

Section: Resultsmentioning

confidence: 66%

The aminosilane functionalization of cellulose nanocrystal aerogel via vapor‐phase reaction and its CO₂ adsorption characteristics

Jia

Wang

et al. 2021

J of Applied Polymer Sci

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The cellulose nanocrystal (CNC) aerogel was functionalized using aminosilane via vapor‐phase reaction and then the modified CNC aerogel was characterized by several techniques such as Fourier transform infrared spectroscopy, FE‐SEM, and elemental analysis. Finally, the CO2 adsorption on the aminosilane‐grafted CNC aerogel was featured using a dual‐site Langmuir adsorption model. The result showed triethylamine significantly enhanced the amine loading, being 7.06 mmol g−1 at 120°C. The primary amine groups in the aminosilane survived the vapor‐phase reaction. The amine groups were homogeneously distributed inside the aerogel due to its porous structure. The dual‐site Langmuir model could well describe its CO2 sorption characteristics. The adsorption capacity was up to 2.57 mmolCO2 g−1 at 25°C and 101.33 kPa, of which the chemisorption entirely dominated, and it decreased only 3%–4% after six runs. Therefore, these features positively suggested the vapor‐phase reaction provided a new and feasible method to functionalize CNC aerogel for the capture of CO2.

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“…At ambient condition, the CO 2 adsorption capacity of TO-wood/Cu 3 (BTC) 2 in this work is superior to that of the wood- or cellulose-based CO 2 sorbents loaded with PEI, 59 acetylated CNCs, 60 and zeolite 61 and is comparable to that of the APTES-grafted TO-CNFs/silica aerogels. 34 Although the TO-CNFs/PEI foam showed a high CO 2 adsorption capacity of 2.22 mmol g –1 at 80% RH, contribution from water is negligible. The same material tested at a lower humidity of 20% RH showed only one-fourth of its maximum capacity.…”

Section: Results and Discussionmentioning

confidence: 97%

Strong Foam-like Composites from Highly Mesoporous Wood and Metal-Organic Frameworks for Efficient CO₂ Capture

Wang

Zhou

2021

ACS Appl. Mater. Interfaces

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Mechanical stability and multicycle durability are essential for emerging solid sorbents to maintain an efficient CO 2 adsorption capacity and reduce cost. In this work, a strong foam-like composite is developed as a CO 2 sorbent by the in situ growth of thermally stable and microporous metal-organic frameworks (MOFs) in a mesoporous cellulose template derived from balsa wood, which is delignified by using sodium chlorite and further functionalized by 2,2,6,6-tetramethylpiperidine-1-oxyl (TEMPO)-mediated oxidation. The surface carboxyl groups in the TEMPO-oxidized wood template (TO-wood) facilitate the coordination of the cellulose network with multivalent metal ions and thus enable the nucleation and in situ growth of MOFs including copper benzene-1,3,5-tricarboxylate [Cu 3 (BTC) 2 ], zinc 2-methylimidazolate, and aluminum benzene-1,3,5-tricarboxylate. The TO-wood/Cu 3 (BTC) 2 composite shows a high specific surface area of 471 m 2 g –1 and a high CO 2 adsorption capacity of 1.46 mmol g –1 at 25 °C and atmospheric pressure. It also demonstrates high durability during the temperature swing cyclic CO 2 adsorption/desorption test. In addition, the TO-wood/Cu 3 (BTC) 2 composite is lightweight but exceptionally strong with a specific elastic modulus of 3034 kN m kg –1 and a specific yield strength of 68 kN m kg –1 under the compression test. The strong and durable TO-wood/MOF composites can potentially be used as a solid sorbent for CO 2 capture, and their application can possibly be extended to environmental remediation, gas separation and purification, insulation, and catalysis.

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Aqueous Synthesis of Compressible and Thermally Stable Cellulose Nanofibril–Silica Aerogel for CO₂ Adsorption

Cited by 43 publications

References 54 publications

Nanocellulose aerogel-based porous coaxial fibers for thermal insulation

Nanocellulose aerogel-based porous coaxial fibers for thermal insulation

The aminosilane functionalization of cellulose nanocrystal aerogel via vapor‐phase reaction and its CO₂ adsorption characteristics

Strong Foam-like Composites from Highly Mesoporous Wood and Metal-Organic Frameworks for Efficient CO₂ Capture

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Aqueous Synthesis of Compressible and Thermally Stable Cellulose Nanofibril–Silica Aerogel for CO2 Adsorption

Cited by 43 publications

References 54 publications

Nanocellulose aerogel-based porous coaxial fibers for thermal insulation

Nanocellulose aerogel-based porous coaxial fibers for thermal insulation

The aminosilane functionalization of cellulose nanocrystal aerogel via vapor‐phase reaction and its CO2 adsorption characteristics

Strong Foam-like Composites from Highly Mesoporous Wood and Metal-Organic Frameworks for Efficient CO2 Capture

Contact Info

Product

Resources

About

Aqueous Synthesis of Compressible and Thermally Stable Cellulose Nanofibril–Silica Aerogel for CO₂ Adsorption

The aminosilane functionalization of cellulose nanocrystal aerogel via vapor‐phase reaction and its CO₂ adsorption characteristics

Strong Foam-like Composites from Highly Mesoporous Wood and Metal-Organic Frameworks for Efficient CO₂ Capture