Effect of Content and Layer Thickness on the Corona-Resistance of PI/TiO₂ Nanocomposite Films

Abstract:

Polymer/TiO2 nanocomposite films have good mechanical, electrical and thermal property, which are applied to electrical engineering and microelectronic technique field extensively. Nano-TiO2 has bigger permittivity and better absorption ultraviolet. The PI/TiO2-PI-PI/TiO2 three layer composite films (30mm) with different content and interlayer thickness were prepared via in-situ dispersion polymerization in this paper. And the films with A (5mm), B (10mm) and C (15mm) interlayer PI thickness are divided into three different series. The results show that inorganic TiO2 nanoparticles are well dispersed in the polymer matrices. And the structures of three layers are obvious. The doped nanoparticles don’t affect the imidization of PI matrix in composite films. The time-to-breakdown of all series films increases with the TiO2 content increasing, in which the B series films possess the best performance. Besides, the B series films with 4% doping content are tested with the longest time-to-breakdown, which is three times more than that of pure PI. After corona aging, there are lots of TiO2-particles with the ability of absorbing UV accumulated on the surface of films, playing the role in shielding electric field, which is one factor resulting in improvement of corona-resistance in the composite films.

• Periodical: Applied Mechanics and Materials (Volumes 395-396)
• Pages: 133-137
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.395-396.133
• Online since: September 2013
• Authors: Xing Zhao, Jin Hua Yin, Rong Jin, Jin Yu Dong
• Keywords: Corona Resistant, Polyimide, Three Layer Composite Film, TiO₂

References

[1] Chiang P C, Wang W T, T sai M H, et al. Physical and Mechanical Properties of Polyimide/titania Hybrid Films[J]. Thin Solid Films, 2004, 447-448: 359-364.

DOI: 10.1016/s0040-6090(03)01081-2

[2] Ding Y X, He T B. Polyimide new material[M]. Beijing: science press, (1998).

[3] Chang C C, Chen W C. Synthesis an Optical Properties of Polyimide-silica Hybrid Thin Films[J]. Chem. Mater., 2002, 14: 4242-4248.

DOI: 10.1021/cm0202310

[4] Kong Y, Du H W. Study on polyimide/TiO2 Nanocomposite Membranes for Gas Seperation[J]. Desalination, 2002, 146: 49-55.

DOI: 10.1016/s0011-9164(02)00476-9

[5] Longieras N, Sebban M Palmas P, et al. Degradation of Epoxy Resins under High Energy Electron beam Irradiation: Radio-oxidation[J]. Poly. Deg. Stability, 2007, 92: 2190-2197.

DOI: 10.1016/j.polymdegradstab.2007.01.035

[6] K azunori T, T etsuji O. Antistatic Process of Dielectric Thin Films Using Low Pressure Discharge Plasma[J]. Journal of Electrostatics, 1999, 46: 193-206.

DOI: 10.1016/s0304-3886(99)00014-5

[7] T sai M H, Liu S J, Chiang P C. Synthesis and Characteristics of Polyimide/titania Nano Hybrid Films[J]. Thin Solid Films, 2006, 515: 1126-1131.

DOI: 10.1016/j.tsf.2006.07.092

[8] Olyphant M，Oakdale Jr E, Bridenbecker A D, et al. Insulatted Electrical Conductors Having Corona Resistant: US, 121171[P]. 1971-01-04.

[9] Xie S H, Zhu B K, Li J B, et al Polyimide/aluminum Nitride Composites[J]. Polymer Testing, 2004, 23: 797-801.

DOI: 10.1016/j.polymertesting.2004.03.005

[10] Wen J Y, Wilkes G L. Organic/inorganic Hybrid Network Materials by the Sol-gel Approach[J]. Chem. Mater., 1996, 8: 1667- 1681.

DOI: 10.1021/cm9601143