Controllable dielectric performance of polymer composites via the Coulomb-blockade effect with core-shell structured nano-particles

作者：Yang, Dan; Huang, Shuo; Ruan, Mengnan; Wu, Yibo; Li, Shuxin; Wang, Hao; Zhang, Jinyu; Ma, Haonan; Guo, Wenli^*; Zhang, Liqun^*

来源：Journal of Materials Chemistry C, 2017, 5(31): 7759-7767.

DOI：10.1039/c7tc00978j

• HIGH-ENERGY DENSITY
• HIGH PERMITTIVITY
• BARIUM-TITANATE
• POLY(DOPAMINE) FUNCTIONALIZATION
• BREAKDOWN STRENGTH
• TIO2 NANOPARTICLES
• BIOMIMETIC METHOD
• NANOCOMPOSITES
• RUBBER
• FILMS

Designed core-shell structured titanium dioxide-poly(dopamine)-silver (TiO2-PDA-Ag) particles were prepared via self-polymerization of poly(dopamine) and electroless plating of nano-silver particles. The poly(dopamine) layer was used not only to improve the interfacial interaction between TiO2 and the nitrile-butadiene rubber (NBR) matrix but also as chemisorption sites for silver ions. Then the TiO2-PDA-Ag particles were introduced into the NBR matrix to prepare dielectric composites. The effect of the nano-Ag content on morphology, dielectric properties, and electrical properties of the composites was thoroughly investigated. It was found that the Coulomb-blockade effect of nano-Ag particles led to the composites with relatively low dielectric loss and relatively high electrical breakdown strength. This simple and effective approach provides a promising route to adjust the dielectric properties of dielectric composites via the Coulomb-blockade effect.

• 出版日期2017-8-21
• 单位北京石油化工学院; 北京化工大学