The benefit of using alkali-treated hemp fibre as the reinforcement for rotationally moulded polyethylene composites was evaluated in this research. Untreated and alkali-treated hemp fibre were characterised using different techniques such as scanning electron microscopy (SEM), thermal analysis, and Fourier transform infrared spectroscopy (FT-IR). These techniques showed that the alkali treatment removed non-cellulosic components from hemp fibres, which improved their separation and thermal resistance. Composites with alkali-treated fibre resisted the exposure to elevated temperatures for prolonged periods (characteristic of the rotational moulding process) with no apparent signs of thermal degradation, unlike when untreated fibre was used. The effect of using maleic anhydride grafted polyethylene (MAPE) as a coupling agent was also investigated. The addition of 3 wt% MAPE improved the properties tensile strength and Young's modulus of composites with treated hemp fibre, which was attributed to better fibre-matrix adhesion. Different fibre contents were assessed in this research to produce rotationally moulded composites; a poor fibre distribution was observed above 5 wt% fibre content, which resulted in low tensile strength and Young's modulus.

在这项研究中评估了使用碱处理的麻纤维作为旋转模塑聚乙烯复合材料的增强材料的好处。未经处理和经碱处理的大麻纤维使用不同的技术进行了表征，例如扫描电子显微镜（SEM），热分析和傅里叶变换红外光谱（FT-IR）。这些技术表明，碱处理从大麻纤维中去除了非纤维素成分，从而改善了它们的分离性和耐热性。与使用未经处理的纤维不同，经碱处理的纤维的复合材料可长时间抵抗高温暴露（旋转模塑工艺的特性），没有明显的热降解迹象。还研究了使用马来酸酐接枝的聚乙烯（MAPE）作为偶联剂的效果。添加3 wt％的MAPE可以改善处理过的大麻纤维复合材料的性能，拉伸强度和杨氏模量，这归因于更好的纤维基质粘合性。在这项研究中评估了不同的纤维含量，以生产旋转模塑复合材料；在纤维含量超过5重量％时观察到不良的纤维分布，这导致低的拉伸强度和杨氏模量。