Extraction and Characterization of Natural Cellulosic Erythrina variegata Fiber for Biocomposites

ABSTRACT

This paper presents a study on extraction and characterization of the cellulose fiber from the bark of Erythrina variegate (EV) plant. Several tests were carried out on Erythrina variegata fibers (EVFs) to determine their properties. These included thermogravimetric analysis (TGA)/difference thermogravimetric (DTG), X-ray diffraction (XRD) analysis, Fourier transform infrared spectroscopy (FTIR) as well as morphological analysis, using scanning electron microscopy (SEM) and atomic force microscopy (AFM). From the results obtained, chemical composition of EVFs, such as cellulose, lignin, ash, and wax content of 70.60, 12.70, 8.60, and 0.24 wt.%, respectively, were recorded through standard chemical analysis. The maximum and average tensile strength of the EVFs were found as 6.06 ± 0.02MPa and 2.80 MPa, respectively. The thermogravimetric analysis on the fiber showed excellent stability with a char residue of 19.23% and a maximum degradation temperature of 349°C. The crystallinity index (CI) of 37.5% and crystalline size of 36.93 nm of EVFs were calculated through X-ray diffraction analysis. The morphological study established that EVFs possessed rough surface even in raw form. The density of EVF was obtained at 1412 kg/m³, which was higher than that of Grewia damine of 1378 kg/m³ and lower than that of jute of 1460 kg/m³.

摘要

本文研究了刺桐树皮中纤维素纤维的提取和表征. 对刺桐纤维 (EVF) 进行了多项测试, 以确定其性能. 其中包括热重分析 (TGA)/差热重分析 (DTG), X射线衍射 (XRD) 分析, 傅里叶变换红外光谱 (FTIR) 以及使用扫描电子显微镜 (SEM) 和原子力显微镜 (AFM) 进行的形态分析. 根据获得的结果, 通过标准化学分析记录EVFs的化学成分, 例如纤维素, 木质素, 灰分和蜡含量分别为70.60, 12.70, 8.60和0.24 wt.%. EVFs的最大和平均抗拉强度分别为6.06 ± 0.02MPa和2.80MPa. 对纤维的热重分析显示出良好的稳定性, 残炭率为19.23%, 最高降解温度为349°C. 通过X射线衍射分析计算了EVFs的结晶指数 (CI) 为37.5%, 晶粒尺寸为36.93 nm. 形态学研究表明, EVFs即使在原始状态下也具有粗糙的表面. EVF的密度为1412kg/m3, 高于Grewia damine的1378kg/m3, 低于黄麻的1460kg/m3.

KEYWORDS:

• Erythrina variegate fibers (EVFs)
• extraction
• characterization
• chemical composition
• biocomposites
• applications

关键词:

• 刺桐杂色纤维
• 提取
• 刻画
• 化学成分
• 生物复合材料
• 应用.

Acknowledgments

The King Saud University authors acknowledge the funding from Researchers Supporting Project (RSP-2021/355), King Saud University, Riyadh, Saudi Arabia.

Disclosure statement

No potential conflict of interest was reported by the author(s).

Correction Statement

This article has been republished with minor changes. These changes do not impact the academic content of the article.