Ultraviolet Weathering Performance of High-Density Polyethylene/Wood-Flour Composites with a Basalt-Fiber-Included Shell
Ultraviolet Weathering Performance of High-Density Polyethylene/Wood-Flour Composites with a Basalt-Fiber-Included Shell
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DOI：
10.3390/polym10080831
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发表时间：
2018-07
期刊：
影响因子：
5
通讯作者：
V. Nguyen;Jianxiu Hao;Wei-hong Wang
中科院分区：
文献类型：
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作者：
V. Nguyen;Jianxiu Hao;Wei-hong Wang
采用共挤出法制备了玄武岩纤维增强高密度聚乙烯（HDPE）/木粉复合材料。将这些复合材料暴露于紫外线老化2000 h后，从颜色、表面形貌和化学性质的测量中检查它们的性能。作为对照，还将UV 326添加到壳配方中。通过扫描电子显微镜、傅里叶变换红外（FTIR）光谱和X射线光电子能谱对风化表面进行了表征。结果表明，填充有8%和12%BF的壳与填充有UV 326的壳相比在有限的持续时间内表现出较低的亮度和颜色变化。具有BF和UV 326组合的复合髋臼杯表现出最少的变色和表面裂纹。FTIR光谱表明，氧化的复合材料的增加与暴露的时间来评估的羰基基团的浓度在表面上。BF和UV 326的组合显示出协同效应，减缓木塑复合材料壳层的光氧化，验证了UV屏蔽效果。
In this study, high-density polyethylene (HDPE)/wood-flour composites with a basalt fiber (BF)-reinforced shell were prepared by coextrusion. After exposing these composites to ultraviolet weathering for 2000 h, their performances were examined from their measurements of color, surface morphology, and chemical properties. As a control, UV326 was also added to the shell formula. The weathered surface was characterized by scanning electron microscopy, Fourier transform infrared (FTIR) spectroscopy, and X-ray photoelectron spectroscopy. The results revealed that the shells filled with 8% and 12% BF exhibited low lightness and color change in comparison to those filled with UV326 for a limited duration. The composite shells with the combined BF and UV326 exhibited the least discoloration and surface cracks. FTIR spectra revealed that the oxidation of the composites increases with the duration of exposure to the assessment of the carbonyl group concentration on the surface. The combination of BF and UV326 revealed a synergistic effect on the alleviation of the photooxidation of wood-plastic composite shell layers, verifying the UV-shielding effect.