Improved Dielectric Properties of Polyvinylidene Fluoride Nanocomposite Embedded with Poly(vinylpyrrolidone)-Coated Gold Nanoparticles

被引：51

作者：

Toor, Anju ^{[1
]}

So, Hongyun ^{[1
]}

Pisano, Albert P. ^{[2
]}

机构：

[1] Univ Calif Berkeley, Dept Mech Engn, Berkeley, CA 94720 USA

[2] Univ Calif San Diego, Dept Mech & Aerosp Engn, San Diego, CA 92093 USA

来源：

ACS APPLIED MATERIALS & INTERFACES | 2017年 / 9卷 / 07期

关键词：

nanoparticle; nanocomposite; dielectric; polymer; particle dispersion; ELECTRICAL-PROPERTIES; PHASE-SEPARATION; BARIUM-TITANATE; ENERGY DENSITY; POLYMER; COMPOSITES; BREAKDOWN; CACU3TI4O12; FILMS; SIZE;

D O I：

10.1021/acsami.6b13900

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

A novel nanocomposite dielectric was developed by embedding polyvinylpyrrolidone (PVP)-encapsulated gold (Au) nanoparticles in the polyvinylidene fluoride (PVDF) polymer matrix. The surface functionalization of Au nanoparticles with PVP facilitates favorable interaction between the particle and polymer phase, enhancing nanoparticle dispersion. To study the effect of entropic interactions on particle dispersion, nanocomposites with two different particle sizes (5 and 20 nm in diameter) were synthesized and characterized. A uniform particle distribution was observed for nanocomposite films consisting of 5 nm Au particles, in contrast to the film with 20 nm particles. The frequency-dependent dielectric permittivity and the loss tangent were studied for the nanocomposite films. These results showed the effectiveness of PVP ligand in controlling the agglomeration of Au particles in the PVDF matrix. Moreover, the study showed the effect of particle concentration on their spatial distribution in the polymer matrix and the dielectric properties of nanocomposite films.

引用

页码：6369 / 6375

页数：7

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