Bibliographic Details
| Title: |
Physicochemical Characterization of Cellulose and Microcrystalline Cellulose from Cordia africana Lam. Seeds. |
| Authors: |
Tessema, Tewodros Ayalew, Feroche, Alemu Tadesse, Workneh, Getachew Adam, Gabriel, Tesfaye |
| Source: |
Journal of Natural Fibers; 2023, Vol. 20 Issue 2, p1-12, 12p |
| Subject Terms: |
CELLULOSE, WOOD-pulp, SCANNING electron microscopy, INFRARED spectroscopy |
| Abstract (English): |
This study aims to explore Cordia africana seeds as an alternative source of cellulose and MCC due to depletion of the major commercial sources such as wood pulp, and cotton. Cellulose was extracted from Cordia africana seeds employing a chlorine-free treatment approach, followed by partial depolymerization using acid hydrolysis to obtain microcrystalline cellulose (MCC). The untreated seeds, as-extracted cellulose, and MCC were investigated for yield, chemical composition, functionality, crystallinity, morphology, diameter, and thermal stability. The cellulose content increased from 30% (w/w) in the untreated seeds to 80.2% (w/w) in cellulose and 88.1% (w/w) in the MCC. The removal of non-cellulosic constituents was confirmed by the results obtained from Fourier-transform infrared spectroscopy, X-ray diffraction, Scanning electron microscopy, and Thermogravimetric analysis (TGA)/Derivative thermogravimetry (DTG). The crystallinity index of as-obtained cellulose and MCC increased from 32.38% (untreated seeds) to 68.28 (cellulose) and 73.19% (MCC) with chemical treatments. The extracted samples exhibited characteristic peaks of Cellulose I at around 15°, 16°, 22°, and 34°. Th e TGA/DTG results confirmed the cellulose and MCC had higher thermal stability than the untreated seeds. This study shows that cellulose and MCC can be obtained from unexploited source, Cordia africana seeds, for promising applications in various industries. [ABSTRACT FROM AUTHOR] |
| Abstract (Chinese): |
由于木浆和棉花等主要商业来源的枯竭，本研究旨在探索非洲虫草种子作为纤维素和MCC的替代来源. 采用无氯处理方法从非洲虫草种子中提取纤维素，然后使用酸水解进行部分解聚，获得微晶纤维素（MCC）. 对未处理的种子、提取的纤维素和MCC的产量、化学成分、功能、结晶度、形态、直径和热稳定性进行了研究. 纤维素含量从未处理种子中的30%（w/w）增加到纤维素中的80.2%（w/w）和MCC中的88.1%（w/w）. 通过傅里叶变换红外光谱、X射线衍射、扫描电子显微镜和热重分析（TGA）/导数热重（DTG）获得的结果证实了非纤维素成分的去除. 化学处理后，所得纤维素和MCC的结晶度指数从32.38%（未处理的种子）提高到68.28（纤维素）和73.19%（MCC）. 提取的样品在15°、16°、22°和34°左右显示出纤维素I的特征峰. TGA/DTG结果证实纤维素和MCC比未处理的种子具有更高的热稳定性. 这项研究表明，纤维素和MCC可以从未开发的来源非洲虫草种子中获得，在各个行业都有很好的应用前景. [ABSTRACT FROM AUTHOR] |
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| Database: |
Complementary Index |
