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Alkali Treatment Influence on Characterization of Setaria Italic (Foxtail Millet) Fiber Reinforced Polymer Composites Using Vacuum Bagging
Journal of Natural Fibers ( IF 3.5 ) Pub Date : 2020-07-09 , DOI: 10.1080/15440478.2020.1788494
R. V. Saikumar Reddy 1 , D. Mohana Krishnudu 1 , P. Rajendra Prasad 1 , P. Venkateshwar Reddy 1
Affiliation  

ABSTRACT

Natural fiber polymer composites have broad interest in recent times due to low cost and superior mechanical properties. The present study deals with Setaria italic (Foxtail millet) fiber reinforced Lapox L-12 resin polymer composite fabricated by vacuum bagging method. The work examined the differences of NaOH alkali-treated (5% and 10% concentration) and untreated fibers with different weight ratios (10%, 15%, and 20%) of fibers. Mechanical properties of the prepared discrete polymer composite materials were analyzed. The alkali treatment behavior of Setaria italic fiber was analyzed using scanning electron microscopy (SEM), thermogravimetric analysis (TGA), and Fourier transform infrared spectroscopy (FTIR). An increase in 35.1%, 8.6%, and 6% for tensile, flexural, and impact strength, respectively, were observed for 20 wt% reinforced composites with 10% NaOH treatment when compared to untreated composites. From TGA, it was concluded that residue content of the samples were observed to be 15%, 10%, and 7% for untreated, 5% NaOH-treated and 10% NaOH-treated samples, respectively. Based on the acquired results, it was concluded that alkali-treated Setaria italic (Foxtail millet) fiber reinforced epoxy composites can be a resourceful substitute in construction and building applications.



中文翻译:

碱处理对使用真空袋装法表征狗尾草(谷子)纤维增强聚合物复合材料的影响

摘要

由于低成本和优越的机械性能,天然纤维聚合物复合材料近年来受到广泛关注。本研究涉及通过真空袋装法制造的斜体狗尾草(谷子)纤维增强 Lapox L-12 树脂聚合物复合材料。这项工作检查了 NaOH 碱处理(5% 和 10% 浓度)和未处理纤维的不同重量比(10%、15% 和 20%)纤维的差异。分析了制备的离散聚合物复合材料的力学性能。采用扫描电子显微镜 (SEM)、热重分析 (TGA) 和傅里叶变换红外光谱 (FTIR) 分析了狗尾草斜体纤维的碱处理行为。拉伸、弯曲和冲击强度分别提高了 35.1%、8.6% 和 6%,与未处理的复合材料相比,用 10% NaOH 处理的 20 wt% 的增强复合材料观察到。从 TGA 得出的结论是,对于未处理、5% NaOH 处理和 10% NaOH 处理的样品,观察到样品的残留物含量分别为 15%、10% 和 7%。根据获得的结果,得出的结论是,碱处理的狗尾草(谷子)纤维增强环氧树脂复合材料可以成为建筑和建筑应用中的资源丰富的替代品。

更新日期:2020-07-09
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