Recent developments in nanocellulose-based aerogels as air filters: A review

Sepahvand, Sima; Kargarzadeh, Hanieh; Jonoobi, Mehdi; Ashori, Alireza; Ismaeilimoghadam, Saeed; Varghese, Rini Thresia; Chirayl, Cintil Jose; Azimi, Bahareh; Danti, Serena

doi:10.1016/j.ijbiomac.2023.125721

Cited by 35 publications

(4 citation statements)

References 95 publications

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“…Such gel structures can be employed for the removal of organic contaminants (e.g., organic dyes, pesticides, polycyclic aromatic hydrocarbons, organic solvents, and oils) and different heavy metal ions (e.g., Cr(III), Cr(IV), As(V), Cd(II), Cu(II), and Pb(II)) [ 65 , 66 , 67 ]. Moreover, interesting studies have revealed the potential of aerogels for gas adsorption, opening the door for air purification [ 68 , 69 , 70 ] and CO 2 conversion applications [ 71 , 72 , 73 ]. Thus, the fabricated materials deserve further investigations to assess their potential for additional uses along with pesticide adsorption.…”

Section: Resultsmentioning

confidence: 99%

Fabrication and Advanced Imaging Characterization of Magnetic Aerogel-Based Thin Films for Water Decontamination

Niculescu,

Mihaiescu,

Bîrcă

et al. 2024

Gels

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Aerogels have emerged as appealing materials for various applications due to their unique features, such as low density, high porosity, high surface area, and low thermal conductivity. Aiming to bring the advantages of these materials to the environmental field, this study focuses on synthesizing magnetic silica aerogel-based films suitable for water decontamination. In this respect, a novel microfluidic platform was created to obtain core-shell iron oxide nanoparticles that were further incorporated into gel-forming precursor solutions. Afterward, dip-coating deposition was utilized to create thin layers of silica-based gels, which were further processed by 15-hour gelation time, solvent transfer, and further CO2 desiccation. A series of physicochemical analyses (XRD, HR-MS FT-ICR, FT-IR, TEM, SEM, and EDS) were performed to characterize the final films and intermediate products. The proposed advanced imaging experimental model for film homogeneity and adsorption characteristics confirmed uniform aerogel film deposition, nanostructured surface, and ability to remove pesticides from contaminated water samples. Based on thorough investigations, it was concluded that the fabricated magnetic aerogel-based thin films are promising candidates for water decontamination and novel solid-phase extraction sample preparation.

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Section: Resultsmentioning

confidence: 99%

Fabrication and Advanced Imaging Characterization of Magnetic Aerogel-Based Thin Films for Water Decontamination

Niculescu,

Mihaiescu,

Bîrcă

et al. 2024

Gels

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“…However, the extraction of nanofibers still presents a challenge regarding commercial production, especially cost. For this reason, these studies have aimed to simplify the extraction process of these materials by utilizing other lignocellulosic sources, such as agricultural residues [14].…”

Section: Introductionmentioning

confidence: 99%

Bionanocomposite Based on Cassava Waste Starch, Locust Bean Galactomannan, and Cassava Waste Cellulose Nanofibers

Fronza,

Batista,

Franca

et al. 2024

Foods

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Natural polysaccharides are among the renewable sources with great potential for replacing petroleum-derived chemicals as precursors to produce biodegradable films. This study aimed to prepare biopolymeric films using starch extracted from the periderm and cortex of cassava roots (waste from cassava root processing), locust bean galactomannan, and cellulose nanofibers also obtained from cassava waste. The films were prepared by casting, and their physicochemical, mechanical, and biodegradability properties were evaluated. The content of cellulose nanofibers varied from 0.5 to 2.5%. Although the addition of cellulose nanofibers did not alter the mechanical properties of the films, it significantly enhanced the vapor barrier of the films (0.055 g mm/m2 h kPa–2.5% nanofibers) and their respective stabilities in aqueous acidic and alkaline media. All prepared films were biodegradable, with complete degradation occurring within five days. The prepared films were deemed promising alternatives for minimizing environmental impacts caused by the disposal of petroleum-derived materials.

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“…On the other hand, the toughening mechanism is about dissipating more energy, which is related to strength and stiffness . Macroscopic networks of cellulose nanofiber, such as bacterial cellulose mats , and regenerated cellulose gels, ,− form continuous phase in nanocomposites when embedded in a polymer matrix. While these networks can effectively dissipate the applied energy and increase the modulus, the connectivity/continuation of the polymer matrix is interrupted, leading to decreased elongation, which compromises toughness.…”

Section: Introductionmentioning

confidence: 99%

“…On the other hand, the toughening mechanism is about dissipating more energy, which is related to strength and stiffness. 27 Macroscopic networks of cellulose nanofiber, 28 such as bacterial cellulose mats 29,30 and regenerated cellulose gels, 27,31−34 continuation of the polymer matrix is interrupted, leading to decreased elongation, which compromises toughness. There-fore, it is essential to maintain the polymer matrix as a continuous phase in the nanocomposite to keep its original stretchability.…”

Section: Introductionmentioning

confidence: 99%

Cellulose Microgel Toughening of Starch Nanocomposites: Exploiting the Advantages of Micro-Nanoscale Networks

Sun,

Li,

et al. 2023

ACS Sustainable Chem. Eng.

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The imperative shift from fossil-based, nonbiodegradable plastics to ecofriendly and biodegradable alternatives stands as a cornerstone of sustainable societal progress. However, the high cost of biodegradable polymers, e.g., poly(butylene adipate) terephthalate (PBAT), hinders the transition to sustainable plastics. And the commonly used biodegradable fillers, such as plasticized starch (PLS), weaken the mechanical performance of biodegradable composites. Cellulose microgels (CM) are micrometer-sized particles consisting of cellulose nanofibers (CNF) with a micronanometer hierarchical architecture. In this work, we show the superior performance of CM in toughening nanocomposites in binary system (CM/PLS) and ternary systems (CM/PLS/PBAT) as compared to CNF. The use of CM simultaneously increases the stress-at-break, Young’s modulus, and strain-at-break, resulting in enhanced toughness, which is compromised by using CNF. CMs hold great potential as novel natural toughening agents for industrial polymers by the typical melt blending process.

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Recent developments in nanocellulose-based aerogels as air filters: A review

Cited by 35 publications

References 95 publications

Fabrication and Advanced Imaging Characterization of Magnetic Aerogel-Based Thin Films for Water Decontamination

Fabrication and Advanced Imaging Characterization of Magnetic Aerogel-Based Thin Films for Water Decontamination

Bionanocomposite Based on Cassava Waste Starch, Locust Bean Galactomannan, and Cassava Waste Cellulose Nanofibers

Cellulose Microgel Toughening of Starch Nanocomposites: Exploiting the Advantages of Micro-Nanoscale Networks

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