Sulfated and carboxylated nanocellulose for Co+2 adsorption

Teixeira, Lucas T.; Braz, Wanderson Ferreira; Siqueira, Rogério Navarro Correia de; Pandoli, Omar; Geraldes, Mauro César

doi:10.1016/j.jmrt.2021.07.123

Cited by 16 publications

(16 citation statements)

References 27 publications

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“…The viscosity for the sCNC and LAE-sCNC suspensions in the studied concentration range was determined previously by some of the authors [12,13]. The measured viscosity of 1.3 mPas for sCNC CelluForce, in agreement with the literature [21][22][23][24][25][26]30], was the same for cellulose nanocrystals and LAE-sCNC (at 0.23 mM LAE). Moreover, the estimated rate of the film thinning was the same for 0.35 mM and 1 mM of LAE and 0.3 wt% of sCNCs.…”

Section: Suspension Characterisationsupporting

confidence: 85%

“…Analytical grade ethyl lauroyl arginate and two types of commercially available cellulose nanocrystals were used: sCNCs with sulfate ester groups and cCNCs with carboxyl groups, both having comparable size and surface charge [12,13]. Industrially produced CNCs compare well with CNCs extracted at a bench scale, with all material containing highly crystalline, high-aspect-ratio cellulose nanocrystals [21][22][23][24][25]. Sulfate-based cellulose nanocrystals derived from cellulose by sulfuric acid hydrolysis are widely available.…”

Section: Introductionmentioning

confidence: 99%

“…Sulfate-based cellulose nanocrystals derived from cellulose by sulfuric acid hydrolysis are widely available. Carboxylic cellulose nanocrystals are manufactured with the technology of H 2 O 2 oxidation [21,22]. So far, they have not been well characterised yet for their interfacial properties.…”

Section: Introductionmentioning

confidence: 99%

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The Influence of the Surface Chemistry of Cellulose Nanocrystals on Ethyl Lauroyl Arginate Foam Stability

et al. 2022

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Guanidine-based surfactant ethyl lauroyl arginate (LAE) and cellulose nanocrystals (CNCs) form complexes of enhanced surface activity when compared to pure surfactants. The LAE-CNC mixtures show enhanced foaming properties. The dynamic thin-film balance technique (DTFB) was used to study the morphology, drainage and rupture of LAE-CNC thin liquid films under constant driving pressure. A total of three concentrations of surfactant and the corresponding mixtures of LAE with sulfated (sCNC) and carboxylated (cCNC) cellulose nanocrystals were studied. The sCNC and cCNC suspension with LAE formed thin films, with stability increasing with surfactant concentration and with complex rheological properties. In the presence of LAE, the aggregation of CNC was observed. While the sCNC aggregates were preferentially present in the film volume with a small fraction at the surface, the cCNC aggregates, due to their higher hydrophobicity, were preferentially located at film interfaces, forming compact layers. The presence of both types of aggregates decreased the stability of the thin liquid film compared to the one for the LAE solution with the same concentration. The addition of CNC to LAE was critical for foam formation, and foam stability was in qualitative agreement with the thin films’ lifetimes. The foam volume increased with the LAE concentration. However, there was an optimum surfactant concentration to achieve stable foam. In particular, the very resistant foam was obtained with cCNC suspensions that formed the interfaces with a complex structure and rheology. On the other hand, at high LAE concentrations, the aggregates of CNC may exhibit antifoaming properties

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Section: Suspension Characterisationsupporting

confidence: 85%

Section: Introductionmentioning

confidence: 99%

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The Influence of the Surface Chemistry of Cellulose Nanocrystals on Ethyl Lauroyl Arginate Foam Stability

et al. 2022

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“…Hydrogels, xerogels, and cryogels based on oxidized cellulose fibers have been also successfully used for the removal of heavy metals from wastewater [ 182 , 186 , 187 , 188 , 189 ]. Many other formulations have been designed to include oxidized cellulose fibers, such as PVA hybrid aerogels [ 190 ], alginate-based materials [ 183 ], graphene oxide-containing hybrid bio-nanocomposites [ 191 ], nanoparticles obtained by assembling PEI into TOCFN-PVA aerogels [ 185 ], sulfated and carboxylated cellulose nanofibrils [ 192 ]. All these materials are highly competitive in terms of adsorption capacity evaluated for numerous heavy metals.…”

Section: Environmental Applications Of Materials Based On Selectively...mentioning

confidence: 99%

Selective Oxidation of Cellulose—A Multitask Platform with Significant Environmental Impact

Duceac¹,

Tanasă²,

Coseri³

2022

Materials

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Raw cellulose, or even agro-industrial waste, have been extensively used for environmental applications, namely industrial water decontamination, due to their effectiveness, availability, and low production cost. This was a response to the increasing societal demand for fresh water, which made the purification of wastewater one of the major research issue for both academic and industrial R&D communities. Cellulose has undergone various derivatization reactions in order to change the cellulose surface charge density, a prerequisite condition to delaminate fibers down to nanometric fibrils through a low-energy process, and to obtain products with various structures and properties able to undergo further processing. Selective oxidation of cellulose, one of the most important methods of chemical modification, turned out to be a multitask platform to obtain new high-performance, versatile, cellulose-based materials, with many other applications aside from the environmental ones: in biomedical engineering and healthcare, energy storage, barrier and sensing applications, food packaging, etc. Various methods of selective oxidation have been studied, but among these, (2,2,6,6-tetramethylpiperidin-1-yl)oxyl) (TEMPO)-mediated and periodate oxidation reactions have attracted more interest due to their enhanced regioselectivity, high yield and degree of substitution, mild conditions, and the possibility to further process the selectively oxidized cellulose into new materials with more complex formulations. This study systematically presents the main methods commonly used for the selective oxidation of cellulose and provides a survey of the most recent reports on the environmental applications of oxidized cellulose, such as the removal of heavy metals, dyes, and other organic pollutants from the wastewater.

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“…Such biopolymers can efficiently act as regulators during nanostructures' synthesis [38]. In this context, polysaccharides nanofibers, such as nanocellulose, have attracted considerable attention from the scientific community, which can be explained by both the high surface area that can be achieved (typically around 153-284 m 2 /g) [38], and the presence of hydroxyl or carboxylate groups when oxidized under the presence of TEMPO [39,40], building interesting sites for controlled nanostructures growth [39]. Additionally, their interaction with the nanostructures obtained can be weak enough (coulombic interaction), making it easy to separate the nanostructure from nanofibers through simple physical processes, such as solvent extraction [39].…”

Section: Introductionmentioning

confidence: 99%

Sustainable Cellulose Nanofibers-Mediated Synthesis of Uniform Spinel Zn-Ferrites Nanocorals for High Performances in Supercapacitors

Teixeira

Lima

Rosado

et al. 2023

IJMS

Self Cite

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Spinel ferrites are versatile, low-cost, and abundant metal oxides with remarkable electronic and magnetic properties, which find several applications. Among them, they have been considered part of the next generation of electrochemical energy storage materials due to their variable oxidation states, low environmental toxicity, and possible synthesis through simple green chemical processing. However, most traditional procedures lead to the formation of poorly controlled materials (in terms of size, shape, composition, and/or crystalline structure). Thus, we report herein a cellulose nanofibers-mediated green procedure to prepare controlled highly porous nanocorals comprised of spinel Zn-ferrites. Then, they presented remarkable applications as electrodes in supercapacitors, which were thoroughly and critically discussed. The spinel Zn-ferrites nanocorals supercapacitor showed a much higher maximum specific capacitance (2031.81 F g−1 at a current density of 1 A g−1) than Fe2O3 and ZnO counterparts prepared by a similar approach (189.74 and 24.39 F g−1 at a current density of 1 A g−1). Its cyclic stability was also scrutinized via galvanostatic charging/discharging and electrochemical impedance spectroscopy, indicating excellent long-term stability. In addition, we manufactured an asymmetric supercapacitor device, which offered a high energy density value of 18.1 Wh kg−1 at a power density of 2609.2 W kg−1 (at 1 A g−1 in 2.0 mol L−1 KOH electrolyte). Based on our findings, we believe that higher performances observed for spinel Zn-ferrites nanocorals could be explained by their unique crystal structure and electronic configuration based on crystal field stabilization energy, which provides an electrostatic repulsion between the d electrons and the p orbitals of the surrounding oxygen anions, creating a level of energy that determines their final supercapacitance then evidenced, which is a very interesting property that could be explored for the production of clean energy storage devices.

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Sulfated and carboxylated nanocellulose for Co+2 adsorption

Cited by 16 publications

References 27 publications

The Influence of the Surface Chemistry of Cellulose Nanocrystals on Ethyl Lauroyl Arginate Foam Stability

The Influence of the Surface Chemistry of Cellulose Nanocrystals on Ethyl Lauroyl Arginate Foam Stability

Selective Oxidation of Cellulose—A Multitask Platform with Significant Environmental Impact

Sustainable Cellulose Nanofibers-Mediated Synthesis of Uniform Spinel Zn-Ferrites Nanocorals for High Performances in Supercapacitors

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