导电纳米粒子增强环氧粘合剂用于复合材料粘合中的局部焦力加热固化
Karina Dragasiute1, Gediminas Monastyreckis1, Daiva Zeleniakiene1
1Department of Mechanical Engineering, Kaunas University of Technology, Studentu str. 56, LT-51424 Kaunas, Lithuania.
Polymers
|May 14, 2025
概括
碳纳米管 (CNT) 增强环氧粘合剂通过局部的朱尔加热实现了高效的复合材料粘合. 对齐的CNT可以提高导电性和固化,提高航空航天应用的剪切强度.
科学领域:
- 材料科学 材料科学 材料科学
- 聚合物化学 聚合物化学
- 纳米技术纳米技术
背景情况:
- 复合材料粘合需要高效和局部化的固化方法.
- 碳纳米管 (CNTs) 为先进材料提供独特的电热性能.
研究的目的:
- 为了研究CNT增强的环氧粘合剂用于局部化的基于焦勒加热的复合材料粘合.
- 评估CNT对齐对电,热和机械性能的影响.
- 建立 CNT 增强的朱尔加热作为一个可行的固化技术.
主要方法:
- 准备和表征了具有不同CNT负载 (0.25-1重量%) 的环氧粘合剂.
- 用直流电压方法进行CNT对齐.
- 用有限元建模和红外热成像来进行热分析.
- 拉皮剪切试验和扫描电子显微镜 (SEM) 用于机械评估和故障分析.
主要成果:
- CNT调整显著降低了透值,并提高了电导率.
- 对齐的CNT导致局部温度增加和更均的加热.
- 在0.5%的CNT重量负载下,达到10.16MPa的峰值切削强度,比纯环氧增加9%.
- SEM分析显示了对齐的CNT集群,以及随着CNT负载增加的故障模式的过渡.
结论:
- 在环氧粘合剂中,CNT对齐对于提高局部导电性和固化效率至关重要.
- 用CNT增强的朱尔加热是一种有希望的,可扩展的替代方案,用于高效的复合材料粘合在苛刻的应用程序.
- 这种方法为结构复合材料提供了更好的机械性能和受控的故障机制.
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