Preparation and Characterization of Polyimide-Silica Nanocomposites by Sol-Gel Process

Abstract:

Polyimide (PI)-based nanocomposites were prepared by the in-situ generation of organic silica nano-particles through a sol-gel process, combined with spin coating and multi-step curing process. In this study, silica nano-particles were introduced into the PI matrix to promote its thermal properties. Nanometer-scale composites were successfully obtained from poly(amic acid) (PAA) mixture loaded with silica. 3,3’,4,4’- Biphenyl tetracarboxylic dianhydride (BPDA) and p-phenylenediamine (p-PDA) were employed to synthesize the PAA precursor. The hybrid thin film was prepared from aminoalkoxysilane-capped PAA and tetraethoxysilane (TEOS). In this work, we investigated the effect of coupling agent, 3-aminopropyltriethoxysilane (APrTEOS). The TGA results indicate that the thermal stability of the nanocomposites can be enhanced as silica content increases. Without the incorporation of APrTEOS, less improvement can be achieved.

• Periodical: Solid State Phenomena (Volume 111)
• Pages: 111-114
• DOI: https://doi.org/10.4028/www.scientific.net/SSP.111.111
• Online since: April 2006
• Authors: Yao Yi Cheng, Kun Chang Chuang
• Keywords: Nanocomposite, Polyimide-Silica, Sol-Gel (SG)

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