ABSTRACT

This study deals with the extraction and characterization of novel cellulosic fiber extracted from the bark of Markhamia lutea tree. The chemical constituents of fibers such as 66.41 wt.% of cellulose, 6.36 wt.% of hemicellulose, 7.82 wt.% of lignin, 0.41 wt.% of wax and 9.06 wt.% of moisture were identified. The functional groups present in the fibers were examined through Fourier transform infrared spectroscopy. The crystallinity index and crystallite size of fibers determined using X-ray diffractogram are found to be 71.77% and 2.07 nm. Lower density (1050 kg/m³) and high tensile strength (835.72 ± 197.05 MPa) makes MLF reinforced polymer composites ideal for lightweight applications. Thermal degradation behavior of the fiber investigated through thermogravimetric, derivative thermogravimetric and differential scanning calorimetry revealed the beginning of initial thermal degradation at 244°C, and this makes them suitable for making green composites.

摘要

本研究涉及提取和表征从Markhamia lutea树树皮中提取的新型纤维素纤维。确定了纤维的化学成分，例如 66.41 wt.% 的纤维素、6.36 wt.% 的半纤维素、7.82 wt.% 的木质素、0.41 wt.% 的蜡和 9.06 wt.% 的水分。通过傅里叶变换红外光谱检查存在于纤维中的官能团。发现使用 X 射线衍射图测定的纤维的结晶度指数和微晶尺寸为 71.77% 和 2.07 nm。较低的密度（1050 kg/m ³) 和高拉伸强度 (835.72 ± 197.05 MPa) 使 MLF 增强聚合物复合材料成为轻型应用的理想选择。通过热重、导数热重和差示扫描量热法研究的纤维的热降解行为表明，在 244°C 时开始初始热降解，这使得它们适合制造绿色复合材料。