ABSTRACT

This research was aimed at investigating the physicochemical, thermal, and mechanical properties of newly identified cellulosic fiber extracted from the bark of Erythrina variegata (EV) tree. The chemical analysis of EVFs revealed the existence of high cellulose (50.64 wt.%) and lignin content (17.44 wt.%) which in turn makes the fiber rigid and strong. Crystallinity index and crystallite size of EVFs determined through X-ray diffraction analysis were found to be 51.80% and 3.00 nm. High onset temperature for hemicellulose degradation (227.99°C) and high activation energy (74.05 kJ/mol) confirms the thermal stability of EVFs. The tensile strength and young’s modulus of EVF were found to be 503.2315 ± 202.23 MPa and 7.62 ± 2.91 GPa. The FESEM micrographs of EVFs revealed the existence of a rough fiber surface, which facilitate better interfacial adhesion with the polymer matrix.

摘要

本研究旨在研究从Erythrina variegata树皮中提取的新发现的纤维素纤维的理化、热和机械性能(EV) 树。EVF 的化学分析揭示了高纤维素 (50.64 wt.%) 和木质素含量 (17.44 wt.%) 的存在，这反过来又使纤维变得坚硬和坚固。发现通过 X 射线衍射分析确定的 EVF 的结晶度指数和微晶尺寸为 51.80% 和 3.00 nm。半纤维素降解的高起始温度 (227.99°C) 和高活化能 (74.05 kJ/mol) 证实了 EVF 的热稳定性。EVF 的拉伸强度和杨氏模量分别为 503.2315 ± 202.23 MPa 和 7.62 ± 2.91 GPa。EVF 的 FESEM 显微照片显示存在粗糙的纤维表面，这有助于与聚合物基质更好的界面粘附。