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

doi:10.11944/j.issn.1000-0518.2020.06.190354

Chinese Journal of Applied Chemistry ›› 2020, Vol. 37 ›› Issue (6): 666-672.DOI: 10.11944/j.issn.1000-0518.2020.06.190354

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

MA Pingchuan^a,MA Lili^b,YANG Zhenghui^a,GUO Haiquan^a^*(),GAO Lianxun^a

^aLaboratory of Polymer Composites Engineering,Changchun Institute of Applied Chemistry,Chinese Academy of Sciences,Changchun 130022,China
^bAdvanced Electrical Materials Research Institute,Qingdao University of Science and Technology,Qingdao,Shandong 266042,China

Received:2019-12-27 Accepted:2020-03-31 Published:2020-06-01 Online:2020-06-08
Contact: GUO Haiquan
Supported by:
Supported by the Jilin Provincial Science and Technology Development Program(No.20170204024GX)

Abstract

Abstract:

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.

Key words: polyimides, corona resistance, alumina, layered double hydroxides

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.

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

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