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- Title
Excellent electrical performance and thermal properties insulation paper based on polyimide porous fiber membrane modified by nano-SiO<sub>2</sub>.
- Authors
Sun, Xue; Chi, Minghe; Weng, Ling; Shi, Jiahao; Zhang, Xiaorui
- Abstract
Oil-paper insulation system is an important insulation structure of converter transformer. At present study, polyamic acid introduced was synthesized firstly, then perform electrospinning and thermal imidization to prepare polyimide (PI) porous fiber membrane, and the nano-SiO2 was introduced into the fiber membrane by in-situ polymerization. FT-IR was used to characterize PI porous fiber membrane chemical structure. Consequently, when the SiO2 addition amount is 4 wt.%, the breakdown voltage of the SiO2/PI composite fiber reaches the maximum, which is 74 kV/mm. The dielectric constant and dielectric loss of the composite fiber film are 1.98–0.0013 (107 Hz). It is worth noticing that nano-SiO2 available in PI significantly improved its electrical performance.
- Subjects
POLYIMIDES; THERMAL insulation; THERMAL properties; BREAKDOWN voltage; PERMITTIVITY; FIBERS; HOLLOW fibers; INSULATING oils
- Publication
Journal of Materials Science: Materials in Electronics, 2021, Vol 32, Issue 22, p26548
- ISSN
0957-4522
- Publication type
Article
- DOI
10.1007/s10854-021-07031-w