| Autor: |
Gómora-Hernández, Julio César, Tecante, Alberto, del Carmen Carreño-de-León, María, Flores-Álamo, Nicolás, Ventura-Cruz, Sagnite |
| Předmět: |
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| Zdroj: |
Cellulose; Mar2023, Vol. 30 Issue 4, p2067-2084, 18p |
| Abstrakt: |
Microcrystalline cellulose was obtained from agave bagasse by sequential alkaline hydrogen peroxide hydrolysis at low reagent concentrations, followed by dilute acid hydrolysis. The impact of reaction time, hydrogen peroxide concentration, and sulfuric acid hydrolysis on the physicochemical properties of the extracted crystalline cellulose was examined. Alkaline treatments efficiently produced porous crystalline cellulose and reduced its lignin and hemicellulose content. However, they were inadequate to remove the characteristic calcium oxalate crystals (COC) in agave bagasse cell walls. No significant differences in crystallinity degrees of the alkaline treated samples were detected in 62.8–5.2%, which increased to 69.4% after acid hydrolysis. X-ray diffractograms revealed the presence of type I cellulose as the primary domain, and FTIR confirmed the presence of COC and the removal of the non-cellulosic components during chemical treatments. In addition, morphological studies revealed the disruption of the lignocellulosic matrix and porous formation. The proposed method promises to produce porous crystalline cellulose in a short-term process, avoiding the complex and high-cost steps such as dewaxing and concentrated acid hydrolysis. Moreover, agave bagasse is a potential waste material for cellulose derivatives with interesting applications. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
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