ABSTRACT

The aims of this study were to identify the best method of extracting cellulose from lignocellulosic fibers based on crystallinity index in the preparation of nanocellulose. Cellulose fibers were extracted by chemical and mechanical methods from Embul variety (AAB) of banana. The chemically extracted cellulose were developed into nanocellulose using acid hydrolysis, as it showed ahigher crystallinity index (61.7%) in the X-Ray Diffraction (XRD) analysis compared to mechanical extraction (50.8%). The crystallinity index of nanocellulose showed abetter value (70.7%) and Fourier Transformed Infrared Spectroscopy (FTIR) revealed that there are changes of bonding patterns of active groups at different stages of extraction process. Further, the fiber yield is lower in chemical extraction compared to mechanical extraction method. The finding reveals that the method of fiber extraction has great influence on quantity and quality of the cellulosic materials to be used, in commercial utilization.

摘要

本研究的目的是根据纳米纤维素制备中的结晶度指数确定从木质纤维素纤维中提取纤维素的最佳方法。通过化学和机械方法从香蕉的 Embul 品种 (AAB) 中提取纤维素纤维。使用酸水解将化学提取的纤维素开发成纳米纤维素，因为与机械提取 (50.8%) 相比，它在 X 射线衍射 (XRD) 分析中显示出更高的结晶度指数 (61.7%)。纳米纤维素的结晶度指数显示出较好的值（70.7%），傅里叶变换红外光谱（FTIR）表明，在提取过程的不同阶段，活性基团的键合模式存在变化。此外，与机械提取方法相比，化学提取的纤维产量较低。