Preparation of Unidirectional Grewia Serrulata Fiber-Reinforced Polyester Composites and Evaluation of Tensile and Flexural Properties

ABSTRACT

Partially biodegradable composites were prepared using bast fibers extracted from Grewia Serrulata trees with unsaturated polyester resin. Different durations of fiber pretreatment and volume fraction variations were tried for fabricating the composites. Hand lay-up technique was used for the fabrication; tensile strength and flexural strength of the specimens were tested following American Society for Testing and Materials (ASTM) standards. It is found that the mechanical properties of Grewia Serrulata bast fiber-reinforced unsaturated polyester composites are superior in comparison with relevant properties of unsaturated polyester resin. Such natural fiber-reinforced composites are adaptable in applications such as automotive interiors, partition walls, and false ceilings and ensures easy material disposal ways at the end of service life as raw materials used are mostly biodegradable.

摘要

本文的研究对象是部分可生物降解的复合材料，它是使用不饱和聚酯树脂从扁担石楠树中提取韧皮纤维而制得的。本文对制造该复合材料的纤维预处理和体积分率变化的不同持续时间进行了试验。制造采用手工涂敷技术；样本的抗拉强度和抗弯强度按照美国测试和材料协会（ASTM）标准进行检测。研究发现，用扁担石楠韧皮纤维增强的不饱和聚酯复合材料的机械性能优于不饱和聚酯树脂的相关性能。这种用天然纤维增强的复合材料有多种用途，例如汽车内饰、隔断墙和吊顶，并且由于其使用的原材料大多是可生物降解的，可确保在其使用寿命结束时易于处理材料。

KEYWORDS:

• Flexural strength
• Grewia Serrulata
• Hand lay-up
• polyester
• tensile strength

关键词:

• 抗弯强度
• 扁担石楠
• 手工涂敷
• 聚酯
• 抗拉强度