Composite aerogels of TEMPO-oxidized pineapple leaf pulp and chitosan for dyes removal

N., Nga H.; Truong, Binh Y.; Nguyen, Phuong Thy; Le, Kien Anh; Duong, Hai M.; Le, Phung K.

doi:10.1016/j.seppur.2021.120200

Cited by 32 publications

(12 citation statements)

References 62 publications

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“…For LCNF-Mec and CNF-Mec, values of 67.87 KPa and 61.50 KPa were observed for tensile strength (TS), respectively (Table S1). These results are substantially higher than those obtained by Do et al [67], in which aerogels made from TEMPO-oxidized nanocellulose reinforced with chitosan showed a maximum YM of 27.25 KPa. Furthermore, the compressive modulus of Mec aerogels was higher than that resulting from a mixture of PVA/carboxymethyl cellulose (0.85-15.42 kPa) [68] and similar to that for CNF aerogels obtained by Huang et al and Luo et al [69,70].…”

Section: Cellulose-based Aerogel Characterizationcontrasting

confidence: 71%

Cellulose Nanofiber-Based Aerogels from Wheat Straw: Influence of Surface Load and Lignin Content on Their Properties and Dye Removal Capacity

et al. 2022

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Water pollution is one of the most serious problems worldwide. Nanocellulose-based aerogels usually show excellent adsorption capacities due to their high aspect ratio, specific surface area and surface charge, making them ideal for water purification. In this work, (ligno)cellulose nanofibers (LCNFs/CNFs) from wheat straw residues were obtained using two types of pre-treatments: mechanical (Mec) and TEMPO-mediated oxidization (TO), to obtain different consistency (0.2, 0.4, 0.6 and 0.8) bioaerogels, and their adsorption capacities as dye removers were further studied. The materials were characterized in terms of density, porosity and mechanical properties. An inversely proportional relationship was observed between the consistencies of the aerogels and their achieved densities. Despite the increase in density, all samples showed porosities above 99%. In terms of mechanical properties, the best results were obtained for the 0.8% consistency LCNF and CNF-Mec aerogels, reaching 67.87 kPa and 64.6 kPa for tensile strength and Young’s modulus, respectively. In contrast, the adsorption capacity of the aerogels was better for TEMPO-oxidized aerogels, reaching removal rates of almost 100% for the CNF-TO5 samples. Furthermore, the residual lignin content in LCNF-Mec aerogels showed a great improvement in the removal capacity, reaching rates higher than 80%, further improving the cost efficiency of the samples due to the reduction in chemical treatments.

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Section: Cellulose-based Aerogel Characterizationcontrasting

confidence: 71%

Cellulose Nanofiber-Based Aerogels from Wheat Straw: Influence of Surface Load and Lignin Content on Their Properties and Dye Removal Capacity

et al. 2022

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“…From the graphs, it can be observed that the pseudo-second-order models’ coefficients of determination for all aerogels were observed to be closer to the value of 1 in contrast to their respective pseudo-first-order models’ correlation coefficient. This implies that the pseudo-second-order model is a better prediction model and a better representation for the oil absorption kinetics of AAs for this study [ 53 ].…”

Section: Resultsmentioning

confidence: 99%

Advanced Fabrication and Multi-Properties of Aluminum-Based Aerogels from Aluminum Waste for Thermal Insulation and Oil Absorption Applications

et al. 2023

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Metal-based aerogels have attracted numerous studies due to their unique physical, structural, thermal, and chemical properties. Utilizing aluminum waste, a novel, facile, environmentally friendly approach to aluminum-based aerogels is proposed. In this work, the aluminum-based aerogels produced do not use toxic chemicals unlike conventional aerogel production. Aluminum powder, with poly(acrylic acid) and carboxymethyl cellulose as binders, is converted into aluminum-based aerogels using the freeze-drying method. The aluminum-based aerogels have low density (0.08–0.12 g/cm3) and high porosity (93.83–95.68%). The thermal conductivity of the aerogels obtained is very low (0.038–0.045 W/m·K), comparable to other types of aerogels and commercial heat insulation materials. Additionally, the aerogels can withstand temperatures up to 1000 °C with less than 40% decomposition. The aerogels exhibited promising oil absorption properties with their absorption capacity of 9.8 g/g and 0.784 g/cm3. The Young’s modulus of the aerogels ranged from 70.6 kPa to 330.2 kPa. This study suggests that aluminum-based aerogels have potential in thermal insulation and oil absorption applications.

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“…Aerogel is well known for outstanding properties such as high mesoporosity (above 90% of air), ultra-lightweight (0.001-0.500 g/cm 3 ), and large specific surface area (100-900 m 2 /g) [4]. Recently, scientific communities have been increasingly interested in using cellulose which is a potential biopolymer with abundant renewable resources on Earth from various agricultural wastes to prepare aerogel for wastewater-containing dye treatment such as coir [5,6], pineapple leaf [7,8], sugarcane bagasse [9], and rice straw [10]. Coconut fibrils, which are one of the strongest, toughest, and hardest natural fibers with cellulose content (43.44%) [11], are evaluated as agro-waste with significant economic value on a global scale; however, these are commonly burned, which results in a detrimental effect on the environment.…”

Section: Introductionmentioning

confidence: 99%

Flexible aerogel composites for the elimination of crystal violet and methyl orange

Nguyen,

Pham,

Nguyen

et al. 2024

Preprint

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The application of porous aerogels for dye adsorption has proven to be an effective approach in wastewater treatment. In this study, bio-cellulose aerogels from coconut fibrils were successfully developed via the formation of physically cross-linking cellulose with non-toxic binders (polyvinyl alcohol (PVA) and xanthan gum (XTG)) after a freeze-drying technique. The resulting cellulose aerogel demonstrated remarkably low density (27.59–47.76 g/cm3), high porosity (> 96.0%), a specific surface area of 518.01 m2/g, and a desorption average pore diameter distribution of 3.77 nm. These aerogels were tested for crystal violet (CV) and methyl orange (MO) adsorption to evaluate their effectiveness in treating dye-polluted water via various conditions such as contact time, pH values, initial concentrations, and temperature. The dye adsorption process reached equilibrium after approx. 30 mins and strictly followed pseudo-second-order and the Redlich-Peterson model. FT-IR and SEM-EDX analyses proved that the adsorption mechanism is primarily ascribed to the hydrogen bonding, electrostatic, π-π, and Vander Waals interactions between aerogel and dye molecules. The eco-friendly synthesis of recycled cellulose aerogels from coconut fibrils using green chemicals holds great promise for dye elimination.

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Composite aerogels of TEMPO-oxidized pineapple leaf pulp and chitosan for dyes removal

Cited by 32 publications

References 62 publications

Cellulose Nanofiber-Based Aerogels from Wheat Straw: Influence of Surface Load and Lignin Content on Their Properties and Dye Removal Capacity

Cellulose Nanofiber-Based Aerogels from Wheat Straw: Influence of Surface Load and Lignin Content on Their Properties and Dye Removal Capacity

Advanced Fabrication and Multi-Properties of Aluminum-Based Aerogels from Aluminum Waste for Thermal Insulation and Oil Absorption Applications

Flexible aerogel composites for the elimination of crystal violet and methyl orange

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