A New Approach for Conversion of Eucalyptus Lignocellulosic Biomass into Cellulose Nanostructures: A Method that Can Be Applied in Industry

Souza, Alana G.; Lima, Giovanni F. de; Rodrigues, Roberta Cunha Matheus; Cesarino, Ivana; Leão, Alcides Lopes; Rosa, Derval dos Santos

doi:10.1080/15440478.2019.1691125

Cited by 20 publications

(11 citation statements)

References 29 publications

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“…The hydrodynamic particle size of all samples is comparable with that observed for commercial cellulose. Comparison with other related works showed that hydrodynamic particle size is of the order of 192 nm for nanostructured cellulose and 438 nm for MCC, both using acid hydrolysis 84,135 . So, it is clear that GM produces sizes even smaller than those reported for nano‐ and microcellulose.…”

Section: Resultsmentioning

confidence: 67%

“…They are even very similar to extracted cellulose from waste pencil shavings with stable temperatures ~200°C 82 . However, SWT 1‐C and SW T2‐C are less stable than extracted cellulose nanostructures treated by acid hydrolysis, sodium chlorite, sodium hydroxide and ball milling process, respectively 84 …”

Section: Resultsmentioning

confidence: 69%

“…who used conventional method followed by acid hydrolysis to obtain CNC of 120–140, 100–130 and 70–100 nm from softwood, hardwood and non‐wood samples, respectively. A method that can be applied at the industry has been reported by Souza et al 84 . who extracted nanostructures of cellulose with a minimum and maximum particle size of 61.0 and 1600 nm, respectively.…”

Section: Resultsmentioning

confidence: 99%

“…It is well known that the determination of extractable compounds has an important role in the inhibition of SW hydrolysis 54 however, it is common to isolate lignocellulosic compounds without a detailed analysis of the extractable compounds. On the other hand, other researches focus on the removal of extractable compounds in different media such as ethanol/toluene, cyclohexane/ethanol and ethanol/water, 54,81 but the studies lack of a structural evaluation 58,[82][83][84] ; highlighting the value of this work.…”

Section: Analysis Of Functional Groups During Cellulose Extractionmentioning

confidence: 99%

“…112 Specifically, this zone is due to the decomposition of the structures linked by acetal and pyranose rings, fragmented into lower molecular weights, releasing CO, CO 2 , organic and volatiles compounds from the amorphous hemicellulose and amorphous/ crystalline cellulose phases. 113,114 Other works have reported this stage as the degradation of hemicelluloses, the breaking of the cellulose glycosidic bond and the beginning of lignin degradation 84 ; the latter is incorrect since lignin begins to degrade at higher temperatures. 115 Although the decomposition of both biopolymers is overlapped in the same signal, the greatest mass loss was observed for cellulosic compounds.…”

Section: Thermal Stability During Cellulose Extraction At Each Step A...mentioning

confidence: 99%

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Valorization of sawdust biomass for biopolymer extraction via green method: Comparison with conventional process

Cárdenas‐Zapata

Palma‐Ramírez

Flores‐Vela

et al. 2022

Intl J of Energy Research

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Summary The valorization of sawdust (SW) biomass by‐product, to extract cellulose through alkali and bleaching processes, including side‐streams to recover hemicellulose and lignin, is performed with the intention of evaluating differences with a proposed green method (GM). The study is developed with the intention of having a process at laboratory scale without leading to the complicated nanoscale processing. This study contemplates a process with scalable characteristics for the future, which contributes to wood processing waste around the world. Particularly, agroindustrial wastes from Durango (SWT1) and Hidalgo (SWT2), local communities of Mexico, were studied. SWT1 and SWT2 samples were processed with ethanol, sodium hydroxide followed by bleaching with sodium chlorite/acetic acid to remove, extractives (E), hemicellulose (H) and lignin (L), respectively. Selected‐SWT2 was processed through a proposed GM using hydrogen peroxide/sodium hydroxide. On the basis of results including Fourier transform infrared spectroscopy, thermogravimetric/differential analysis (TGA/DTG), X‐ray diffraction (XRD), dynamic light scattering, high heating value, scanning electron microscopy techniques and chemical composition, GM was capable of producing a biomass rich in α‐cellulose (58.0%: SWT2‐C), whereas processed SWT1 and SWT2 through conventional method led to a more percentage of H, β‐ and γ‐C mixtures than α‐polymorphous; 41.0% and 51.0%, respectively. This new method could impact of an important manner to the development of biodegradable thermoplastics. The approximation, from deconvolution of TGA/DTA, led to determine adequately the composition of hemicellulose (SWT1‐C: 51.0%, SWT2‐C: 36.0–0.00%), lignin (SWT1‐C: 17.0%, SWT2‐C: 20.0%) and cellulose (SWT1‐C: 32.0%, SWT2‐C: 44.0%). XRD analysis also indicated that samples contain the following percentage of polymorphous cellulose compounds: SWT1‐C (Type II: 71.3%), SWT2‐C (Type I α: 44.6% and II: 41.4%) and SWT2‐C‐GM (Type II: 38.8%), which confirms that the combination of the type of biomass and the applied pretreatment plays a fundamental role for final applications; in this case, it can be appropriate for elastomers and thermoplastic uses. As a final point, the cellulose composition and thermal stability of both sources is comparable with the commonly used raw material for commercial products.

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Section: Resultsmentioning

confidence: 67%

Section: Resultsmentioning

confidence: 69%

Section: Resultsmentioning

confidence: 99%

Section: Analysis Of Functional Groups During Cellulose Extractionmentioning

confidence: 99%

Section: Thermal Stability During Cellulose Extraction At Each Step A...mentioning

confidence: 99%

See 3 more Smart Citations

Valorization of sawdust biomass for biopolymer extraction via green method: Comparison with conventional process

Cárdenas‐Zapata

Palma‐Ramírez

Flores‐Vela

et al. 2022

Intl J of Energy Research

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Nanocellulose as Reinforcement in Carboxymethylcellulose Superabsorbent Nanocomposite Hydrogels

Lima

Souza

Rosa

2020

Macromolecular Symposia

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Carboxymethylcellulose (CMC) is an abundant and low‐cost material that can be used to synthesize environmentally friendly superabsorbent hydrogels for numerous applications. However, this biopolymer results in hydrogels with poor mechanical properties; different fillers can be used to improve this property, but occasionally can decrease the swelling capacity. Nanocelluloses (NC) are an excellent option to improve hydrogel physicochemical characteristics. In this work, CMC‐hydrogels are prepared using citric acid, and NC is added as a filler in different contents: 1, 3, and 5 wt%. The Fourier Transformed Infrared spectroscopy (FTIR) is used to confirm the crosslink reaction, and a peak related to the carboxylic acid functional group confirmed the hydrogel formation. The NC incorporation didn't change the FTIR spectrum since both materials have a similar structure. The water absorption analysis indicated that the developed can be classified as superabsorbent since all of them show an absorption capacity above 40 g.g−1. Besides that, NC played an essential role in the water absorption capacity, the incorporation of 3% of NC resulted in a material with a degree of swelling of, approximately 100 g.g−1. The NCs act as an excellent filler, improving the storage modulus significantly, i.e., the mechanical resistance of the material. The developed hydrogels showed exceptional characteristics, being adequate to various applications, mainly agricultural ones aiming for the water delivery to the soil.

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Pretreatment of lignocellulosic feedstocks for cellulose nanofibril production

Copenhaver

Wang

et al. 2022

Cellulose

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A New Approach for Conversion of Eucalyptus Lignocellulosic Biomass into Cellulose Nanostructures: A Method that Can Be Applied in Industry

Cited by 20 publications

References 29 publications

Valorization of sawdust biomass for biopolymer extraction via green method: Comparison with conventional process

Valorization of sawdust biomass for biopolymer extraction via green method: Comparison with conventional process

Nanocellulose as Reinforcement in Carboxymethylcellulose Superabsorbent Nanocomposite Hydrogels

Pretreatment of lignocellulosic feedstocks for cellulose nanofibril production

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