通过剪切对齐的BNNT/环氧复合材料进行几何可编程的热路由:从被动扩散到定向引导
Jisu Park1,2, Seongbin Kim1,2, Taehoon Hwang1,2
1Department of Materials Science and Chemical Engineering, Hanyang University, Ansan, Republic of Korea.
Small methods
|March 17, 2026
概括
研究人员开发了一种化纳米管 (BNNT) /环氧热导体,用于精确的热路由. 这种材料选择性地导向热量,防止绝缘基板上的热点,同时保持电绝缘.
科学领域:
- 材料科学 材料科学 材料科学
- 纳米技术 纳米技术
- 热管理 热管理
背景情况:
- 绝缘基板上的局部热点是由于设备小型化和功率密度增加而造成的越来越严重的问题.
- 目前的散热方法是非选择性的,导致效率低下的热管理和对敏感元件的潜在损伤.
- 需要能够控制,定向传热的先进材料.
研究的目的:
- 开发一种用于选择性和几何可编程的热路由的新型热指南.
- 为了研究化纳米管 (BNNT) /环氧复合材料的热和电性能.
- 为了证明分配器打印的可行性,以创建微规模的热管理解决方案.
主要方法:
- 制造一种粘度调节的BNNT/环氧墨水.
- 微喷嘴挤出处理以诱导剪切诱导的BNNTs对齐.
- 使用小角度X射线散射,流动模拟,红外热学和电阻测量进行表征.
主要成果:
- 对齐的BNNT/环氧复合材料表现出显著的平面内热异构性 (ky/kx ≈2.53-2.96).
- 红外热学证实了对齐导向的热传输,定向的标本显示在BNNT对齐轴上更高的温度.
- 该材料保持了介电完整性 (体积电阻≤1013Ω·m在20重%的BNNT) 和低介电损耗.
- 分配器打印使得能够创建~200微米宽的指南,其终端温度对比度>20°C.
结论:
- 该BNNT/环氧热导使电气安全,选择性热路由从局部来源到目标地区.
- 开发的方法有效地抑制了寄生虫侧向热扩散,保护热敏感区域.
- 这项技术为微电子设备和其他应用中的先进热管理提供了有前途的解决方案.
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