五种植物纤维/聚乙烯木塑复合材料紫外老化性能

doi:10.19936/j.cnki.2096-8000.20241228.004

摘要/Abstract

摘要： 为探究杨木、稻壳、竹材、稻秆、麦秆五种植物纤维/聚乙烯(PE)木塑复合材料的紫外老化性能,对其进行为期120 d的人工加速紫外老化试验,分析其老化前后表观颜色、质量、力学性能和微观形貌变化。结果表明:人工紫外老化导致五种PE基木塑复合材料色差变化稳定,质量先降低(前30 d)后回增,力学性能下降,出现断面裂缝、翘曲。紫外老化120 d后,五种PE基木塑复合材料弯曲强度和拉伸强度降幅如下:杨木/PE复合材料分别为32.04%和16.31%,稻壳/PE复合材料分别为34.95%和26.41%,竹材/PE复合材料分别为27.57%和21.85%,稻秆/PE复合材料分别为33.06%和27.85%,麦秆/PE复合材料分别为25.57%和23.95%。

关键词: 植物纤维, 聚乙烯, 木塑复合材料, 紫外老化, 力学性能

Abstract: In order to investigate the UV aging properties of polyethylene (PE) based wood plastic composites, five types of plant fibers (poplar, rice husk, bamboo, rice straw and straw fibers) were incorporated into PE. The 120-day artificially accelerated UV aging test was carried on to analysis the color stability, quality, mechanical properties, and microstructure of five types of plant/PE composites before and after aging. The results indicate that artificial UV aging causes stable color difference changes, a decreased quality (during the first 30 days) followed by an increase, and poorer mechanical properties, with cracks and warping in the sections in the five PE-based wood plastic composites. After the 120 days of UV aging, the reductions of the flexural and tensile strength of poplar/PE composites are 32.04% and 16.31%, respectively; for the rice husk/PE composites, the reductions are 34.95% and 26.41%, respectively; for the rice bamboo/PE composites, the reductions are 27.57% and 21.85%, respectively; for the rice straw/PE composites, the reductions are 33.06% and 27.85%, respectively; and for the straw/PE composites, the reductions are 25.57% and 23.95%, respectively.

Key words: plant fibers, polyethylene, wood plastic composites, UV aging, mechanical properties

中图分类号:

TB332

黄淼林, 方海, 霍瑞丽, 陈航. 五种植物纤维/聚乙烯木塑复合材料紫外老化性能[J]. 复合材料科学与工程, 2024, 0(12): 26-33.

HUANG Miaolin, FANG Hai, HUO Ruili, CHEN Hang. UV aging properties of five types of plant fibers/polyethylene wood plastic composites[J]. COMPOSITES SCIENCE AND ENGINEERING, 2024, 0(12): 26-33.

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