Preparation and Characterization of Cellulose Acetate and Cellulose Nitrate
Prepared from Cellulose Extracted from Calamagrostis intermedia

Vela, Dennis Renato Manzano; Logroño, Fernando Augusto Novillo

doi:10.14233/ajchem.2022.23862

Cited by 3 publications

(2 citation statements)

References 24 publications

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“…After achieving a neutral pH through successive washings, a treatment was carried out with a 3.5% sodium chlorite solution, heating it in a water bath at 95°C for 40 minutes. Finally, the sample underwent additional treatments with 20% NaOH and 0.5% sodium chlorite solutions, with constant stirring, followed by washings and a nal drying at 65°C to obtain pure cellulose [9]. This alkaline method, by not requiring prior degreasing steps or meticulous cleaning, represents a more direct and e cient approach for cellulose extraction, especially suitable for laboratory-scale studies and potential industrial applications [11].…”

Section: Cellulose Extractionmentioning

confidence: 99%

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Integral Evaluation of the Cellulose of Tibouchina lepidota (Bonpl.) Baill. for the Valorization of Residues in Sustainable Forestry Management

Vela,

Vizuete,

Mancheno

2024

Preprint

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This study investigates cellulose extracted from Tibouchina lepidota, a native forest species of Ecuador. It focuses on its potential for industrial use, highlighting its role in the circular economy and carbon footprint reduction. The research explores the use of forest waste as a cellulose source, proposing sustainable alternatives to traditional tree species. The methodology includes botanical identification, sample pretreatment, and cellulose extraction through an alkaline process. The extracted cellulose was characterized using Fourier Transform Infrared (FTIR) spectroscopy and optical microscopy, examining its morphology, structure, and solubility to determine its typology. Results revealed that particle size significantly influences cellulose extraction yield, with smaller particles showing higher efficiency, confirming it as beta-type via solubility tests in alkaline solutions. Microscopic observations indicated a high-quality filamentous structure, with thin, long, and non-oriented filaments. This research demonstrates the viability of Tibouchina lepidota as a sustainable cellulose source, highlighting its potential for industry and contribution to more sustainable and balanced forest management practices, providing a solid foundation for future developments in bioeconomy and composite material industry.

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Section: Cellulose Extractionmentioning

confidence: 99%

“…The cellulose extraction from Tibouchina lepidota was carried out using an alkaline methodology, which offers signi cant advantages in terms of e ciency and simplicity [9]. This technique is characterized by its ability to extract cellulose without the need for prior degreasing or exhaustive sample cleaning.…”

Section: Cellulose Extractionmentioning

confidence: 99%

Integral Evaluation of the Cellulose of Tibouchina lepidota (Bonpl.) Baill. for the Valorization of Residues in Sustainable Forestry Management

Vela,

Vizuete,

Mancheno

2024

Preprint

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Implications of Particle Size in the Extraction of Cellulose from the Calamagrostis Intermedia Species

Manzano Vela,

Zabala Vizuete,

Flores Mancheno

2023

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This research aimed to elucidate the implications of particle size on cellulose extraction from the species Calamagrostis intermedia, endemic to Ecuador. Within the versatile cellulose extraction and trade industry, using timber sources results in a relentless environmental impact, mainly when no resource rationing occurs during the washing or bleaching phases. The investigation incorporated a sample pretreatment encompassing a drying, grinding, and sieving study, followed by an alkaline extraction. The study found that particle size significantly affected the quantity of fiber and cellulose pulp extracted from samples previously dried at 65°C with particle sizes of 300 and 106 μm. Characterization tests revealed variations in the color and texture of the extracted cellulose, attributable to an ineffective delignification stage within the fiber bleaching process. Variations in molecular weight corresponding to 126.32 x 103 g/mol were identified among samples, and FTIR analysis presented a syringyl ring and lignin stretching. Optical microscopy exposed the absence of well-defined regions in the fibers and a readily observable crystalline network. In conclusion, particle size critically influences cellulose extraction from Calamagrostis intermedia, impacting the yield and properties of the resultant product, indicating that further optimization of the extraction and delignification process is required to enhance the quality of the extracted cellulose. Keywords: Calamagrostis intermedia; Particle Size; Cellulose Extraction

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Utilization of Forest Residues for Cellulose Extraction from Timber Species in the High Montane Forest of Chimborazo, Ecuador

Manzano Vela,

Villegas Freire,

Zabala Vizuete

et al. 2024

Polymers

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The present study explored the extraction of cellulose from forest residues of four timber species, namely Cedrela montana Moritz ex Turcz, Buddleja incana Ruiz & Pav, Vallea stipularis L. f. and Myrsine andina (Mez) Pipoly, in the high montane forest of Chimborazo province, Ecuador, for the sustainable utilization of leaves, branches, and flowers. An alkaline extraction method was used on the residues without the need for prior degreasing. An ANOVA analysis was applied to evaluate significant differences in cellulose extraction yields among the species’ residues. The characterization techniques used were Fourier transform infrared spectroscopy (FTIR) and polarized light optical microscopy, which confirmed the successful extraction of cellulose with characteristics comparable to standard cotton cellulose and other traditional species. The results showed significant variations in cellulose yield among the species, with Vallea stipularis L. f achieving the highest yield of 80.83%. The crystallinity of the samples was clearly evidenced by the polarity of the light in the samples during microscopy, demonstrating that the residues can be a viable and sustainable source of cellulose, contributing to a circular economy and reducing the environmental impact of forest waste.

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Preparation and Characterization of Cellulose Acetate and Cellulose Nitrate Prepared from Cellulose Extracted from Calamagrostis intermedia

Cited by 3 publications

References 24 publications

Integral Evaluation of the Cellulose of Tibouchina lepidota (Bonpl.) Baill. for the Valorization of Residues in Sustainable Forestry Management

Integral Evaluation of the Cellulose of Tibouchina lepidota (Bonpl.) Baill. for the Valorization of Residues in Sustainable Forestry Management

Implications of Particle Size in the Extraction of Cellulose from the Calamagrostis Intermedia Species

Utilization of Forest Residues for Cellulose Extraction from Timber Species in the High Montane Forest of Chimborazo, Ecuador

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