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- Title
A novel poly(p-phenylene benzobisoxazole) (PBO)-based three-phase silk-cocoon network structure nanocomposites with enhanced dielectric properties.
- Authors
Ni, Xinyao; Feng, Hao; Li, Lihui; Liu, Xiaoyun; Wang, Tianyi; Cui, Zhong-Kai; Gu, Jinlou; Zhuang, Qixin
- Abstract
Nanocomposites with great thermal stability and excellent dielectric properties play a vital role in the development of high-temperature resistant capacitors. A facile yet effective method to synthesize enhanced dielectric properties of thermostable three-phase poly(p-phenylene benzobisoxazole) (mCCTO@CFGO/PBO) nanocomposite films is demonstrated in this work. The amino-functionalized oxide CaCu3Ti4O12 nanoparticles (mCCTO) are enwrapped by the carboxyl-functionalized ultrathin graphene shells (CFGO), forming the silk-cocoon structure to achieve homogeneous dispersion in the matrix. The final films are fabricated via in situ polymerization by introducing the mCCTO@CFGO nanoparticles into the PBO precursor polymer. The mCCTO@CFGO/PBO nanocomposite films exhibit high thermal stability (the 5% thermal decomposition temperature is 655 °C), while the unique silk-cocoon structure effectively confers the high dielectric constant up to 86.9 and ultra-low dielectric loss (0.063) with the loading of 10 wt% mCCTO@3 wt% CFGO/PBO at 1 kHz and 200 °C. This promising strategy accelerates the development of electronic devices used under high temperatures.
- Subjects
DIELECTRIC properties; LEAD oxides; NANOCOMPOSITE materials; DIELECTRIC loss; PERMITTIVITY; THERMAL stability
- Publication
Journal of Materials Science: Materials in Electronics, 2021, Vol 32, Issue 6, p7574
- ISSN
0957-4522
- Publication type
Article
- DOI
10.1007/s10854-021-05474-9