Dielectric properties and thermal conductivity of PVDF reinforced with three types of Zn particles

详细信息    查看全文

• 作者：Wenying Zhou^a ; ^b ; ^{wyzhou2004@163.com" class="auth_mail" title="E-mail the corresponding author} ; Zijun Wang^a ; Lina Dong^a ; Xuezhen Sui^a ; Qingguo Chen^b ; ^{qgchen@263.net" class="auth_mail" title="E-mail the corresponding author}
• 关键词：A. Polymer matrix composites (PMCs) ; Metal ; B. Thermal properties ; B. Electrical properties
• 刊名：Composites Part A: Applied Science and Manufacturing
• 出版年：2015
• 出版时间：December 2015
• 年：2015
• 卷：79
• 期：Complete
• 页码：183-191
• 全文大小：1499 K

文摘

In this study, three types of Zinc (Zn) particles, i.e., the spherical Zn (s-Zn), flaky Zn (f-Zn), and metal–semiconductor Zn@ZnO core–shell structure, are incorporated in poly(vinylidene fluoride) (PVDF) to obtain high dielectric permittivity polymer. The morphological, dielectric properties and thermal conductivity of the composites are characterized. The results indicate that compared with the s-Zn/PVDF the Zn@ZnO/PVDF at lower filler loading exhibited obviously higher dielectric permittivity due to the duplex interfacial polarizations, and that the f-Zn/PVDF showed larger dielectric permittivity and thermal conductivity owing to f-Zn’s high aspect ratio facilitating the formation of bridges between themselves. Furthermore, the dissipation factors of the s-Zn/PVDF and Zn@ZnO/PVDF were still at low level owing to the presence of self-passivation layer or ZnO shell between Zn core and PVDF, leading to a high critical filler concentration, whereas, a noticeable variation in the dissipation factor for the f-Zn/PVDF is observed up to 12 vol.% f-Zn.