碳基纳米填充剂对CFRP冷温度机械性能的影响
Aldobenedetto Zotti1, Simona Zuppolini1, Anna Borriello1
1Institute for Polymers, Composites and Biomaterials, National Research Council of Italy, P.le Fermi, 1, 80055 Portici, NA, Italy.
Polymers
|March 13, 2024
概括
添加像石墨烯纳米板块 (GNPs) 这样的碳纳米填充剂可以增强碳纤维增强聚合物 (CFRPs) 的冷机械性能. 这些纳米填充剂在室温和冷温度下提高了断裂性和屈曲强度.
科学领域:
- 材料科学 材料科学 材料科学
- 聚合物工程 聚合物工程
- 纳米技术 纳米技术
背景情况:
- 碳纤维增强聚合物 (CFRP) 在需要高性能的应用中至关重要.
- 了解它们在冷温度 (77K) 的机械行为对于专业用途至关重要.
- 结合纳米填充剂可能会增强CFRP的性能,但它们的冷性能需要调查.
研究的目的:
- 研究碳基纳米填充剂 (石墨烯纳米板,碳纳米纤维,碳纳米管) 在冷温度 (77 K) 下对CFRP机械性能的影响.
- 评估无溶剂流化床混合技术 (FBM) 的有效性,以创建纳米复合材料矩阵.
- 评估破裂性,屈曲强度和间层切割强度 (ILSS) 在室温 (RT) 和 77 K 的改善.
主要方法:
- 使用流化床混合 (FBM) 将0.5%重量的石墨烯纳米板 (GNP),碳纳米纤维 (CNF) 或碳纳米管 (CNT) 纳入环氧基质.
- 单向CFRP样品的制造通过将碳纤维浸纳米填充剂修饰的环氧纤维.
- 低温机械测试 (77K) 使用现场调节方法,包括断裂性,曲性和层间剪切强度 (ILSS) 测试.
- 光学显微镜用于填充剂分散分析.
主要成果:
- 在环氧矩阵内观察到GNP和CNF的均分散.
- 用GNP加载的系统表现出更好的断裂性,在RT时应力强度因子 (KC) 增加了13.2%,在77K时增加了14.7%.
- 柔性测试表明,在RT和77K时,所有测试的碳基纳米填充剂的柔性强度普遍增加.
结论:
- 碳基纳米填充剂,特别是GNP,显著增强了CFRP的冷机械性能.
- 在CFRP应用中,FBM技术有效地在环氧矩阵中实现同质的纳米填充剂分散.
- 这些发现支持使用纳米填充剂修改的CFRP用于在冷温度下工作的结构部件.
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