https://orcid.org/0000-0001-7579-4595
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ABSTRACT
The present study aims to explore the modification of nanofiller lignite fly ash (LFA) on mechanical, wear, friction, and moisture intake behavior of Sansevieria Roxburghiana fiber (SRF)-reinforced epoxy composites. The matrix epoxy was modified with a filler LFA of size 20 nm with different weight proportions of 0, 0.5, 1, 1.5, 2, and 2.5. The composite samples with different compositions were manufactured with a hand layup method followed by a compression molding technique. The prepared samples were investigated for tensile, flexural, impact, wear, and friction properties as per ASTM standards. The optimal results on tensile, impact, flexural, wear, and friction properties were obtained with the addition of 2 wt. % filler LFA. The percentage increase in the mechanical properties was perceived as 38.33% for tensile, 41.34% for flexural, and 33.56% for impact strength respectively. Minimum moisture intake is observed for the composite samples with nanofiller LFA, the water diffusion coefficient was reduced by 55% with the incorporation of nanoparticles LFA. The rupture surface of tensile-tested specimens was inspected using a scanning electron microscope. The SRF epoxy composites possess excellent tribological and mechanical features that can be exploited as low-cost construction materials.
摘要
本研究旨在探讨纳米填料褐煤粉煤灰（LFA）对刺梨纤维（SRF）增强环氧树脂复合材料的力学性能、磨损性能、摩擦性能和吸湿性能的影响. 采用粒径为20nm的填料LFA对基体环氧树脂进行改性，改性剂的重量比分别为0、0.5、1、1.5、2和2.5. 采用手糊法和模压工艺制备了不同成分的复合材料样品. 根据ASTM标准，对制备的样品进行拉伸、弯曲、冲击、磨损和摩擦性能研究. 添加质量分数为2%的填料LFA，可获得最佳的拉伸、冲击、弯曲、磨损和摩擦性能. 拉伸、弯曲和冲击强度分别提高了38.33%、41.34%和33.56%. 纳米填料LFA的加入使复合材料的水分吸收量最小，水分扩散系数降低了55%. 用扫描电子显微镜观察拉伸试样的断裂面. SRF环氧复合材料具有优良的摩擦学和力学性能，可以作为低成本的建筑材料.
Acknowledgments
The authors would like to acknowledge the Central workshop of the Mechanical Engineering Department, Anna University (Chennai, India), and the research center of Easwari Engineering College (Chennai, India) for providing their facilities for completing the research work.