Core鈥揝hell Structured Biopolymer@BaTiO3 Nanoparticles for Biopolymer Nanocomposites with Significantly Enhanced Dielectric Properties and Energy Storage Capability
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- 作者：Yanyan Fan ; Xingyi Huang ; Guanyao Wang ; Pingkai Jiang
- 刊名：Journal of Physical Chemistry C
- 出版年：2015
- 出版时间：December 10, 2015
- 年：2015
- 卷：119
- 期：49
- 页码：27330-27339
- 全文大小：870K
- ISSN：1932-7455
文摘
Flexible high-dielectric-constant (high-魏) nanocomposite dielectrics comprising polymer matrix and ceramic nanoparticles have important applications in the fields of electrical insulation and energy storage. However, most of the flexible high-魏 nanocomposites are fabricated by using nonbiodegradable polymers as matrixes, which may not meet the increasing demands of society for environmental sustainability. In this study, using biodegradable polylactic acid (PLA) as a matrix and core鈥搒hell structured BaTiO3 (BT) nanoparticles as high-魏 filler, we report the preparation and structure鈥損roperty relationship of environmentally friendly flexible high-魏 polymer nanocomposites. Two types of core鈥搒hell structured high-魏 nanoparticles [polydopamine-encapsulated BT (BT@PDA) and PLA-encapsulated BT@PDA (BT@PDA@PLA)] as well as as-prepared BT nanoparticles were used as filler of the PLA-based high-魏 nanocomposites. It was found that, compared with the as-prepared BT nanocomposites, the core鈥搒hell nanoparticle-based composites show enhanced dielectric constant, suppressed dielectric loss tangent, and enhanced breakdown strength. In addition, the BT@PDA@PLA nanocomposites have much higher dielectric constant and energy density. The nanoparticle鈥揚LA compatibility and its influence on the dielectric and energy storage properties of the nanocomposites were also investigated. Because the polymer matrix is environmentally friendly and the preparation process of the core鈥搒hell nanoparticles is facile and nontoxic, the nanocomposites reported here may be used in the next generation of environmentally friendly high-performance energy storage devices.