基岩纤维增强生物基不和聚复合材料的冷解耐用性
Abu T Shahid1, Mateus Hofmann2, Mário Garrido1
1Civil Engineering Research and Innovation for Sustainability (CERIS), Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais 1, 1049-001 Lisbon, Portugal.
Materials (Basel, Switzerland)
|August 12, 2023
概括
这项研究发现,沉浸在水中显著降解了生物基复合材料,比传统复合材料更多. 冷解周期的影响最小,在生物复合材料中观察到一些物质恢复.
科学领域:
- 材料科学 材料科学 材料科学
- 聚合物复合材料 聚合物复合材料
- 耐用性测试 耐用性测试
背景情况:
- 研究纤维聚合物复合材料的耐用性对于其应用至关重要.
- 生物基树脂为传统的以石油为基础的不和聚树脂 (UPR) 提供了可持续的替代品.
- 了解材料对环境压力因素的反应,例如结解 (FT) 周期,至关重要.
研究的目的:
- 实验评估生物纤维聚合物复合物的湿解 (FT) 耐用性.
- 为了比较生物基复合物的性能与常规油基复合物的性能.
- 评估浸水预调和FT循环对复合材料性能的影响.
主要方法:
- 用真空输注来生产由生物基和传统的UPR增强基岩纤维的复合材料.
- 复合材料经过了浸水预调,然后再进行多达300个湿的FT循环.
- 进行了机械 (拉力,压力,剪切) 和热力学 (DMA) 测试,以及重力学和SEM分析.
主要成果:
- 浸水预制导致生物复合材料的性能大幅降低 (5-39%),超过传统复合材料 (4-22%).
- 单单湿的FT循环对性能降解的影响很小;一些由矩阵主导的特性,如间层切削强度,显示恢复 (12%在生物复合材料中).
- 与传统复合材料相比,生物复合材料的整体性能较差,主要是由于其生物基树脂组件的水友性.
结论:
- 生物基树脂组件的水友性显著影响水浸浸过程中复合材料的耐用性.
- 湿解循环对这些复合材料的有害作用比初始水和的效果要小.
- 需要进一步开发,以提高生物基复合材料的耐水性,以便适用于苛刻的应用.
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