Characterization of Sida acuta fiber and its polymer composites with effect of fly ash

ABSTRACT

In this paper, the physical, chemical, and thermal properties of cellulosic fiber extracted from the stem of Sida acuta have been reported. Tests such as tensile, chemical, thermo gravimetric analysis, X-ray diffraction, and Fourier transform infrared spectroscopy were conducted on Sida acuta fibers (SAFs). From the test results, it was found that SAFs possess high cellulose content (72.99 wt.%), high tensile strength (627 ± 14 MPa), high crystallinity index (67.70%), and high thermal stability (up to 240°C). Furthermore, the water absorption and mechanical properties of Sida acuta fiber reinforced epoxy composite added with fly ash filler were studied through tensile, flexural, and impact test as per the ASTM standards. The composite samples were prepared by varying the weight fraction of fly ash at 1, 1.5, 2, and 2.5 wt.%. The experimental results revealed that the composites added with 2 wt.% fly ash exhibited superior mechanical properties when compared to other samples. The surface morphological changes of fiber-matrix interface due to the presence of fly ash were confirmed through the field emission scanning electron microscope images obtained from the fractured tensile specimens.

摘要

本文报道了从刺五加茎中提取的纤维素纤维的物理、化学和热性能. 对Sida acuta纤维(SAF)进行了拉伸、化学、热重分析、X射线衍射和傅里叶变换红外光谱等测试. 根据试验结果, 发现SAFs具有高纤维素含量 (72.99 wt.%)、高拉伸强度 (627±14 MPa)、高结晶指数 (67.70%), 和高热稳定性 (高达240°C). 此外, 根据ASTM标准, 通过拉伸、弯曲和冲击试验研究了添加粉煤灰填料的Sida acuta纤维增强环氧复合材料的吸水性和力学性能. 通过改变1、1.5、2和2.5 wt.%下飞灰的重量分数制备复合样品. 实验结果表明, 与其他样品相比, 添加2 wt.%粉煤灰的复合材料具有优异的力学性能. 通过从断裂拉伸试样获得的场发射扫描电子显微镜 (FESEM) 图像, 证实了由于粉煤灰的存在而导致的纤维-基体界面的表面形态变化.

关键词:

• 维
• 纤维素
• 结晶度指数
• 抗拉强度
• 热稳定性
• 力学性能

KEYWORDS:

• Sida acuta fibers
• cellulose
• crystallinity index
• tensile strength
• thermal stability
• mechanical properties

Acknowledgments

The authors thank the lab assistant, University College of Engineering Tindivanam 604001, Tamilnadu, India, for rendering his support for carrying out this research work.

Disclosure statement

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