Dynamic Mechanical Analysis, Biodegradability and Water Absorption Behavior of Permanganate Treated Woven Fabrics/Polyvinyl Alcohol Composites

ABSTRACT

Natural fiber composites are the recent upcoming materials used in structural and other general engineering applications. They are more popular because of their biodegradability, lightweight, more strength-to-weight ratio, easy availability, eco-friendliness, and sustainable material features. But natural fibers are available in the form of dust particles, hemicellulose, lignin, and other waste substances, due to the existence of these particles strength and internal bonding could vary. To improve strength and contact area between fabric/matrix, chemical treatment is very much necessary. In the present work, plain woven banana fabrics (PWBFs)/polyvinyl alcohol (PVA) biodegradable composites were prepared to understand the effect of potassium permanganate (KMnO₄) solution with 0.5, 1, 2, 3, and 4% concentrations for 4 hours, test samples were fabricated by using hand lay-up method as per ASTM standards, tested for dynamic mechanical analysis. From the experimental results, it was observed that 1% KMnO₄-treated composite got the best results as compared to untreated and other sets of treated composites. Hence for further analysis, biodegradability and water absorption analysis were carried out for a duration of 60 days, from experimental results it was noticed that KMnO₄ treated composites required more time to completely biodegradable in normal soil and increases the surface roughness as well as decreased the water absorption.

摘要

天然纤维复合材料是近期即将用于结构和其他一般工程应用的材料. 由于其生物降解性、重量轻、强度重量比更高、易获得、环保和可持续材料特性, 它们更受欢迎. 但是, 天然纤维以灰尘颗粒、半纤维素、木质素和其他废弃物的形式存在, 因为这些颗粒的存在强度和内部结合可能会有所不同. 为了提高织物/基体之间的强度和接触面积, 化学处理是非常必要的. 本研究制备了香蕉平纹织物 (PWBFs)/聚乙烯醇 (PVA) 可生物降解复合材料, 以了解高锰酸钾 (KMnO4) 溶液在0.5%、1%、2%、3%和4%浓度下4小时的效果. 根据ASTM标准, 采用手糊法制作试样, 进行动态力学分析. 从实验结果来看, 与未经处理和其他处理的复合材料相比, 1%高锰酸钾处理的复合材料获得了最好的结果. 因此, 为了进一步分析, 进行了为期60天的生物降解性和吸水性分析. 从实验结果来看, KMnO4处理的复合材料需要更多时间才能在正常土壤中完全生物降解, 增加了表面粗糙度, 同时降低了吸水率.

KEYWORDS:

• PWBFs
• PVA
• KMnO₄
• dynamic mechanical behavior
• biodegradability
• water absorption

关键词:

• 动态力学行为
• 生物降解性
• 吸水性

Acknowledgments

The authors would like to express their gratitude towards Nagarjuna College of Engineering and Technology, Bangalore and Sri Jayachamarajendra College of Engineering, Mysore for the smooth conduction of experimental tests.

Disclosure statement

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

Additional information

Funding

The author(s) received no financial support for the current work, authorship and/or publication of this article.