Experimental characterization of surface modified Palmyra Palm Leaf Stalk Fiber (PPLSF) /polymer composites– Mechanical, Crystallinity and Acoustic properties

ABSTRACT

In this work chemically treated Palmyra Palm Leaf Stalk Fiber (PPLSF) reinforced polymer composites are evaluated for their mechanical properties (Tensile, Flexural, and Impact) before and after Moisture absorption, crystallinity, and acoustic properties for their possible usage in engineering applications. Alkali and silane treated PPLSF are used as reinforcements in the polyester matrix for fabrication of composite samples. The composite specimens were soaked in three types of water (drinking water, well water and sea water) for a period of 3 days and tests on the specimens were conducted after each day of immersion at different time intervals. It was observed that there was less moisture abortion was less in silane treated composites. Mechanical and acoustic tests showed that the properties of silane treated fiber composites were higher compared to all the other composites. Moisture penetration was higher in the composites exposed to sea water in comparison to others. The changes in the crystallinity index of the composites were identified through X-Ray Diffraction (XRD) technique. Scanning Electron Microscopy (SEM) images of the tensile fractured specimens were used to understand the mechanism of failure of the composites before and after moisture absorption. Properties of the composites from the literature were compared with those of the proposed composite.

摘要

在这项工作中，对化学处理的棕榈叶柄纤维（PPLSF）增强聚合物复合材料在吸湿前后的力学性能（拉伸、弯曲和冲击）、结晶度和声学性能进行了评估，以确定其在工程应用中的可能用途. 经碱和硅烷处理的PPLSF用作聚酯基体中的增强材料，用于制备复合样品. 复合试样在三种水（饮用水、井水和海水）中浸泡三天，并在每天浸泡后以不同的时间间隔对试样进行测试. 观察到硅烷处理的复合材料中水分流失较少. 力学和声学测试表明，硅烷处理的纤维复合材料的性能高于其他所有复合材料. 与其他材料相比，暴露于海水中的复合材料的透湿性更高. 通过X射线衍射（XRD）技术确定了复合材料结晶度指数的变化. 利用拉伸断裂试样的扫描电子显微镜（SEM）图像来了解吸湿前后复合材料的失效机理. 将文献中的复合材料的性能与所提出的复合材料进行了比较.

KEYWORDS:

• Palmyra Palm Leaf Stalk Fiber
• moisture absorption
• mechanical properties
• acoustic properties
• cyrstallinity

关键词:

• 棕榈叶柄纤维
• 吸湿性
• 机械性能
• 声学性能
• 细胞相容性

Acknowledgments

The authors would like to thank the Naval Research Board (NRB) of DRDO, India for providing funding support vide NRB-412/MAT/17-18, infrastructure facilities support provided by DRDO center Bharatiyar University Coimbatore, Tamil Nadu, India, and infrastructure provided by the management of Dr. Mahalingam college of Engineering Technology, Pollachi, Coimbatore, Tamil Nadu, India, to carry out the work.

Additional information

Funding

This work was supported by the Naval Research Board [NRB-412/MAT/17-18].