Abstract A Fourier transform infrared (FTIR) spectro-microtomography system was used to conduct a 3-dimensional (3D) structural analysis of a Polyimide (PI) blend/boron nitride (BN) composite film, and the system was optimized by measuring materials with complex shapes, including a micrometer-sized loop and commercial PAN fiber. The results of the 3D reconstruction of the microloop and PAN fiber are in good agreement with optical and chemical images. In addition, the FTIR spectro-microtomography successfully described the phase separation behaviors of the PI blend/BN composite film in a 3D representation. Thereby, we could observe the internal structure of the blend film, which improves the thermal conduction in the out-of-plane direction.

中文翻译：

---

使用 FTIR 光谱显微断层扫描仪对 PI 共混物/BN 复合膜进行 3D 结构分析

摘要 使用傅里叶变换红外 (FTIR) 光谱显微成像系统对聚酰亚胺 (PI) 共混物/氮化硼 (BN) 复合薄膜进行 3D (3D) 结构分析，并通过测量材料的复杂的形状，包括微米大小的环和商用 PAN 纤维。微环和 PAN 光纤的 3D 重建结果与光学和化学图像非常吻合。此外，FTIR 光谱显微断层扫描成功地以 3D 表示方式描述了 PI 共混物/BN 复合膜的相分离行为。因此，我们可以观察到共混膜的内部结构，这改善了面外方向的热传导。