Influence of Surface Modifications of Flax Fiber on Mechanical and Flow Properties of Thermoplastic Polyurethane Based Eco-Composites

ABSTRACT

In this study, several treatments including alkali, permanganate, peroxide and silanization were applied to flax fiber (FF) to improve its adhesion to bio-based thermoplastic polyurethane (TPU) matrix. TPU/FF composites were prepared at a constant ratio of 30 wt% by using extrusion process. Their mechanical properties, modulus of elasticity, water uptake behaviors, melt-flow properties and morphologies of composites were investigated. All treatments resulted in better mechanical properties with respect to untreated FF. Silane treated FF containing composite exhibited the highest tensile strength and lowest water absorption. Results confirmed that surface modifications improve the adhesion between FF and TPU matrix.

亚麻纤维表面改性对热塑性聚氨酯基复合材料力学性能和流动性能的影响

在这项研究中，几种处理方法包括碱、高锰酸钾、过氧化氢和硅烷化应用于亚麻纤维（FF），以提高其对生物基热塑性聚氨酯（TPU）基质的粘合性。在通过使用挤压工艺的30％（重量）的恒定比率制备的TPU / FF复合材料。研究了它们的其机械性能，弹性模量，熔融流动性和形态的影响。所有的处理中，相对于未经处理的FF，取得了较好的mechan-15机械性能。硅烷处理的含FF复合材料具有最高的拉伸强度和低吸水性。结果表明，表面改性提高FF和TPU基质之间的粘附力。

KEYWORDS:

• Flax fiber
• green composites
• mechanical properties
• polymer composites
• surface modification
• thermoplastic polyurethane

关键词:

• 亚麻纤维；绿色复合材料；力学性能；聚合物复合材料；表面改性；热塑性聚氨酯