不同环境因素对玉米老化的影响/聚碳酸 (PPC) /聚乳酸 (PLA) 复合材料
MengYao Han1, Yu Lin1, Jiaming Yu1
1School of Materials Science and Engineering, Beihua University, Jilin 132000, China.
ACS omega
|January 20, 2025
概括
环境因素大大降低了玉米复合材料的性能. 高温,湿度和光照会降低机械强度,改变表面性能,影响材料的耐用性和外观.
科学领域:
- 材料科学 材料科学 材料科学
- 聚合物科学 聚合物科学
- 复合材料 复合材料 复合材料
背景情况:
- 基于玉米的复合材料提供了可持续的替代品,但需要了解环境退化.
- 聚碳酸盐 (PC) 和聚乳酸 (PLA) 是复合材料中常用的聚合物.
- 温度,湿度和光等环境因素显著影响材料性能.
研究的目的:
- 研究各种环境老化条件对玉米/PC/PLA复合材料的机械性能,表面形态和微观结构的影响.
- 在不同的老化场景下量化机械性能的退化.
- 分析因环境暴露而导致的表面和内部结构的变化.
主要方法:
- 被湿热,自然和氧化热老化的复合样本.
- 使用扫描电子显微镜 (SEM) 对表面形态学的分析.
- 通过富里埃变换红外光谱学 (FTIR),X射线光电子光谱学 (XPS),热重力学分析 (TGA) 和X射线衍射 (XRD) 进行表征.
主要成果:
- 高温导致塑料降解,使曲强度和冲击强度分别降低了57.6%和30.3%.
- 高湿度导致水透,削弱纤维-矩阵键并减少曲和冲击强度分别为58.1%和7.2%.
- 暴露于光线诱导的素光氧化,导致表面色 (△E增加了19.28%).
结论:
- 温度,湿度和光线显著降解玉米/PC/PLA复合材料.
- 降解表现为机械强度降低,表面形态变化和微观结构变化.
- 了解这些环境影响对于预测和提高这些可持续复合材料的长期耐用性至关重要.
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