@article{Su2022, 
author = {Liying Su and Xiaoyan Ma and Jiale Zhou and Xiangchen Liu and Fanglin Du and Chao Teng},
title = {Large-scale preparation of high-performance boron nitride/aramid nanofiber dielectric composites},
year = {2022},
journal = {Nano Research},
volume = {15},
number = {9},
pages = {8648-8655},
keywords = {multifunctional composites, thermal properties, mechanical properties, dielectric properties},
url = {https://www.sciopen.com/article/10.1007/s12274-022-4456-6},
doi = {10.1007/s12274-022-4456-6},
abstract = {Dielectric polymers featuring high thermal conductivity, excellent mechanical, and stable dielectric properties over a broad temperature range have attracted extensive scientific attention. In this work, a large-scale, layered film was fabricated using blade-coating approach, which integrated aramid nanofibers (ANFs) and boron nitride nanosheets (BNNSs) through a typical sol-gel transformation procedure. The as-prepared film with 20 wt.% BNNS displays high thermal conductivity (14.03 W·m−1·K−1), 103-fold higher than pure ANF film, attributing to massive continuous thermal conduction pathway between BNNSs so as to facilitate fast phonon transmission. The film boasts excellent mechanical properties (stress 97.14 ± 5.17 MPa, strain 19.36 ± 0.35%), high degradation temperature (~ 542 °C), a moderate dielectric constant (~ 6.9 at 104 Hz), together with low dielectric loss (~ 0.026 at 104 Hz). Meanwhile, the film reveals high breakdown voltage (310 MV·m−1) and volume resistivity (1013 Ω·cm). Notably, these dielectric properties remain largely unchanged over a wide temperature range (25 to 200 °C).}
}