Citation: MA Pingchuan, MA Lili, YANG Zhenghui, GUO Haiquan, GAO Lianxun. Improved Corona-Resistance Properties of Alumina/Polyimide Films with Exfoliated Layered Double Hydroxide Nanosheets[J]. Chinese Journal of Applied Chemistry, ;2020, 37(6): 666-672. doi: 10.11944/j.issn.1000-0518.2020.06.190354 shu

Improved Corona-Resistance Properties of Alumina/Polyimide Films with Exfoliated Layered Double Hydroxide Nanosheets

a.
Laboratory of Polymer Composites Engineering, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China
b.
Advanced Electrical Materials Research Institute, Qingdao University of Science and Technology, Qingdao, Shandong 266042, China

Corresponding author: GUO Haiquan, hqguo@ciac.ac.cn
Received Date: 27 December 2019
Revised Date: 10 March 2020
Accepted Date: 31 March 2020

Fund Project: Supported by the Jilin Provincial Science and Technology Development Program(No.20170204024GX)the Jilin Provincial Science and Technology Development Program 20170204024GX

Figures(11)

Incorporation of inorganic nanoparticles to polyimides is an important strategy to improve corona resistance. The improvement of corona-resistant characteristics is closely related to the dispersion of nano fillers. The controllable distribution of nanoparticles in polymer matrix has always been a challenge. In this paper, The Al₂O₃/polyimide(PI) composites were synthesised via in situ polymerization in the solution of two-dimensional nano-sheets exfoliated from layered double hydroxides (LDH). In the process of the film formation, the two-dimensional nano-sheets tend to aggregate and orientate towards the substrates with the solvent volatilization, which would affect the distribution of Al₂O₃ in the polymer matrix, and furthermore improve the corona resistance of the Al₂O₃/LDH/PI composites. The corona resistance time of Al₂O₃/LDH/PI composites is 180 min, and improves by twelve-fold when 2% (mass fraction) LDH is added into 10% (mass fraction) Al₂O₃/PI composites, and the tensile strength increases by 37.8%. Due to the different morphologies, the combination of two-dimensional nanosheets and nanoparticles can effectively improve the corona resistance and mechanical properties of Al₂O₃/LDH/PI composite films.
- polyimides,
- corona resistance,
- alumina,
- layered double hydroxides
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沈阳化工大学材料科学与工程学院沈阳 110142