Details

Autor(en) / Beteiligte

• KONG, Yu-Nan
• YIN, Jing-Hua
• TIE, Wen-Lu
• LIU, Xiao-Xu
• SONG, Ming-Xin
• LEI, Qing-Quan

Titel

Preparation and Corona Resistant of Polyimide/TiO sub(2) Nanocomposite Films

Ist Teil von

• Wu ji cai liao xue bao, 2014-01, Vol.29 (1), p.98-102

Erscheinungsjahr

2014

Quelle

EZB Electronic Journals Library

Beschreibungen/Notizen

• The polyimide (PI)/TiO sub(2) composite films with different component were prepared by in-situ dispersion polymerization. Thickness of the obtained films is about 50 [mu]m. The characterization results show that diameter of spherical TiO sub(2) in the films is about 100 nm and the size of the lamellar polyimide is about 2 [mu]m x 1 [mu]m. With the increase of the TiO sub(2) content, electrical breakdown strength increases firstly and then decreases, while the values of permittivity, dielectric loss, corona resistant lifetime increase. Under the electric field of 40 kV/mm, corona resistant lifetime of pure PI is about 3 h, while the lifetime of composite film with 20wt% TiO sub(2) is about 25 h. TiO sub(2)has a high performance in corona resistance forming interphase with polymer and changing the trapping levels of material, facilitating diffusion of space charge and transmission of heat in material. A large of TiO sub(2) particles can form discharge blocking layer on the surface of films and reduce internal