Extraction and Characterization of Fiber and Cellulose from Ethiopian Linseed Straw: Determination of Retting Period and Optimization of Multi-Step Alkaline Peroxide Process

Feleke, Kibrom; Thothadri, Ganesh; Tufa, Habtamu Beri; Rajhi, Ali A.; Ahmed, Gulam Mohammed Sayeed

doi:10.3390/polym15020469

Cited by 30 publications

(13 citation statements)

References 81 publications

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“…It is noteworthy that LO, EC, and P‐EC all exhibit hydrophobic properties, enabling the establishment of interactions between LO and the respective EC and P‐EC components via hydrophobic forces. This, in turn, expedites the encapsulation of the oil payload 34,38 . Additionally, a discerning analysis of the microcapsules formed with EC and P‐EC revealed the absence of spectral bands related to SDS, thereby substantiating the efficacy of the cleaning procedures implemented during the preparation steps.…”

Section: Resultsmentioning

confidence: 81%

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Anti‐solvent method synthesized phosphorylated microcapsules with flame retardancy and self‐healing analysis

Li,

Meng,

Song

et al. 2024

J of Applied Polymer Sci

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In this study, an anti‐solvent method is employed to encapsulate linseed oil (LO) into phosphorylated ethyl cellulose (P‐EC), successfully preparing microcapsules (LO@P‐EC). Scanning electron microscopy and Fourier transform infrared spectroscopy experimental results indicate the introduction of phosphoric groups into P‐EC, and the successful encapsulation of LO within the microcapsules, which are spherical with an average diameter of 145 μm. Hartmann tests reveal that the introduction of phosphate groups reduces the microcapsule flame propagation height by 43.75% and the average flame propagation speed by 55.67%. Thermodynamic analyses based on the Coats‐Redfern equation are performed to determine the changes in activation energy during thermal degradation. Furthermore, fitting analysis shows that the apparent activation energy of microcapsules with shell material of P‐EC significantly increases, confirming the evident thermodynamic inhibition of microcapsule deflagration by P‐EC. This is mainly attributed to the formation of a char structure by the P‐EC shell during combustion, which hinders the progress of the combustion reaction. When immersed in 3.5 wt% NaCl corrosive solution for 15 days, the microcapsule‐filled epoxy resin (LO@P‐EC/EP) coating exhibits excellent corrosion resistance, which is mainly attributed to the excellent self‐healing properties of the microcapsule core LO.

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Section: Resultsmentioning

confidence: 81%

“…This, in turn, expedites the encapsulation of the oil payload. 34,38 Additionally, a discerning analysis of the microcapsules formed with EC and P-EC revealed the absence of spectral bands related to SDS, thereby substantiating the efficacy of the cleaning procedures implemented during the preparation steps.…”

Section: Ftir Analysismentioning

confidence: 77%

Anti‐solvent method synthesized phosphorylated microcapsules with flame retardancy and self‐healing analysis

Li,

Meng,

Song

et al. 2024

J of Applied Polymer Sci

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“…These different cellulose ratios vary based on factors such as plant species, geographical location, and climate of the cultivation area. Although all cellulosicbased fibers share the same fundamental chemical components, the diversity in their ratios results in varied properties and behaviors in the fibers (Feleke et al 2023).…”

Section: Morphological Characterization Of Sbfmentioning

confidence: 99%

Exploring the potential of sustainable natural cellulosic fiber from Sorghum bicolor (Sorghum vulgare var. technicus) stem for textile and composite applications

Ovalı,

Eryılmaz,

Uyanık

2024

Cellulose

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In the present research, the usability of cellulosic-based fibers obtained from the Sorghum bicolor plant stem as reinforcing fibers in composites and textiles was investigated. The fibers were obtained from a Sorghum bicolor plant growing wild in the Adana region in the South of Turkey. Density, chemical structure analysis, FTIR, XRD, TGA, XPS SEM, and single fiber tensile tests characterized Sorghum bicolor fiber (SBF). SBF contains cellulose (73.6%), hemicellulose (13.3%), and lignin (12.1%). The oxygen/carbon ratio of 0.43 found as a result of XPS analysis indicates that fibers have a hydrophilic character. SBF has a 59.34% crystallinity index, 284.6 MPa tensile strength, 4.71% GPa tensile modulus, and 21.44% elongation at break. The maximum degradation temperature of the fibers was determined as 364.22 °C. Sorghum bicolor fiber, through detailed characterization, emerges as potential promising reinforcement for the composite industry with relatively good strength and high cellulose content for the textile industry.

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“…Table 2. Cellulose content in some plants [14][15][16][17]. Leveraging this resource as a renewable source of cellulose fibers presents a more sustainable strategy for mitigating substantial volumes of agro-residue.…”

Section: Fibermentioning

confidence: 99%

Conversion of Waste Agricultural Biomass from Straw into Useful Bioproducts—Wheat Fibers and Biofuels

Kovačević,

Bischof,

Bilandžija

et al. 2024

Sustainability

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Straw, the primary agricultural waste, constitutes approximately 20% of the total biomass in the EU. Only a small fraction of the material is applied in various products, e.g., animal bedding, mulch, building, and composite materials, while a significantly larger portion is often burned in the field. This practice, while prohibited for several reasons, including the increased risk of fire and the release of carbon dioxide contributing to global warming, is still prevalent. Given the increasingly evident effects of climate change, EU legislation aims to reduce greenhouse gas emissions as much as possible. One of the strategies includes applying the cascade principle in the circular economy. This principle aims to use the entire raw material, in this case, cereal crops, such that the products with the highest added value, like cellulose fibers from cereal straw, are extracted first. The vast potential for utilizing lignocellulosic agro-waste sustainably arises from its status as the most abundant organic compound on Earth. Its significant presence, renewability, and biodegradability make it a desirable source for producing materials in numerous industries. This study examines the potential of wheat fibers, isolated from the straw of two distinct cultivars (Srpanjka represents an old variety, and Kraljica represents the new variety) primarily for application in technical textiles. The following testing methods were applied: determination of wheat fibers and residues yield, fibers tensile properties, length, moisture content/regain, density, morphology, and Fourier transform infrared (FTIR) spectroscopy. The yield of isolated fibers relies on the wheat variety and the climatic conditions affecting plant growth, resulting in fiber yields from 10.91% to 15.34%. Fourier transform infrared (FTIR) analysis indicates reduced peak intensity, which is related to hemicellulose and lignin content, suggesting their improved deposition following the process of chemical maceration. Wheat fiber quality was found to be comparable to cotton fibers regarding its density. However, they showed a significant difference in higher moisture regain (9.72–11.40%). The vast majority of the scientific papers related to wheat fibers did not indicate the length of the individual fibers obtained by chemical maceration nor their strength. Therefore, this paper indicated that both varieties demonstrated sufficient fiber tenacity (greater than 10 cN/tex) and fiber length (2–3 cm), stressing the spinning potential of these fibers into yarns and extending their use to the apparel industry. Moreover, our research underscores the feasibility of adhering to the zero-waste principle. A high percentage of solid waste remaining after fiber extraction (25.3–39.5%) was successfully used for biofuel production, thus closing the loop in the circular economy.

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Extraction and Characterization of Fiber and Cellulose from Ethiopian Linseed Straw: Determination of Retting Period and Optimization of Multi-Step Alkaline Peroxide Process

Cited by 30 publications

References 81 publications

Anti‐solvent method synthesized phosphorylated microcapsules with flame retardancy and self‐healing analysis

Anti‐solvent method synthesized phosphorylated microcapsules with flame retardancy and self‐healing analysis

Exploring the potential of sustainable natural cellulosic fiber from Sorghum bicolor (Sorghum vulgare var. technicus) stem for textile and composite applications

Conversion of Waste Agricultural Biomass from Straw into Useful Bioproducts—Wheat Fibers and Biofuels

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