Microcrystalline cellulose (MCC) and nutshell fiber reinforced high-density polyethylene (HDPE) composites were exposed to accelerated weathering for total of 672 h. The effects of weathering exposure on the mechanical, surface and morphological properties of the composites were investigated. The results revealed that the weathering exposure caused a slight decrease on tensile and flexural strengths whilst the modulus of elasticity increased up to 62%. The MCC / nutshell reinforced composites had higher color changes and gloss loss than MCC reinforced composites. Addition of MCC and nutshell to HDPE composites increased surface roughness of samples. After the weathering, the polymer band intensities decreased due to the degradation. The SEM observations on the exposed composites are in accordance with the surface roughness of composites after weathering. The investigated properties of MCC/nutshell filled HDPE composites were less affected by weathering exposure than those of composites without nutshell.

微晶纤维素 (MCC) 和坚果壳纤维增强高密度聚乙烯 (HDPE) 复合材料暴露于加速风化条件下总共 672 小时。研究了风化暴露对复合材料的力学、表面和形态性能的影响。结果表明，风化暴露导致拉伸和弯曲强度略有下降，而弹性模量增加了 62%。MCC/坚果壳增强复合材料比MCC增强复合材料具有更高的颜色变化和光泽损失。在 HDPE 复合材料中添加 MCC 和 nutshell 会增加样品的表面粗糙度。风化后，聚合物带强度由于降解而降低。暴露的复合材料的 SEM 观察与风化后复合材料的表面粗糙度一致。与没有坚果壳的复合材料相比，MCC/坚果壳填充的 HDPE 复合材料的研究性能受风化暴露的影响较小。