通过不同时间紫外老化处理纳米氧化锌改性木塑复合材料，分析老化前后试样颜色和弯曲强度的变化，结合 SEM和 FTIR 探讨复合材料的老化机制，分析不同含量纳米氧化锌对木塑复合材料抗老化性能的影响。结果表明：紫外老化处理后复合材料表面颜色发生变化，添加纳米氧化锌后能够改善颜色变化；老化1500 h 后空白试样的弯曲强度下降19．08％，添加1％、2％、3％、4％、5％的试样的弯曲强度分别下降15．04％、13．60％、13．71％、12．00％、14．09％；通过 SEM观察老化处理后复合材料发现其表面出现裂纹，FTIR 分析得出老化后复合材料表面发生氧化。
Anti Ageing Properties of Nano-ZnO Modified Wood Plastic Composites
The performance of wood fiber reinforced high density polyethylene composites (WPC)after experi-encing ultraviolet accelerated aging was investigated.The aging mechanism and the effect of different content of Nano-ZnO on the anti-aging properties were studied by SEMand FTIR.The results showed that ultraviolet acceler-ated aging leads to the composites color changing,which can be better with Nano-ZnO modification.The bending strength of WPC decreased significantly after aging.The bending strength of blank samples decreased by 19.08%after 1 500 h aging,and by 15.04%,13.60%,13.71%,12.00%,14.09%,respectively,for the WPCs modified with Nano-ZnO.SEManalysis showed cracks on the weathered surface of composites,and FTIR analysis indicated oxidation occurring on the surface during aging.
国家科技期刊平台
NSTL
万方数据
维普
