Effect of the carbon nanotube surface characteristics on the conductivity and dielectric constant of carbon nanotube/poly(vinylidene fluoride) composites

被引：0
作者：
Sónia AC Carabineiro
Manuel FR Pereira
João N Pereira
Cristina Caparros
Vitor Sencadas
Senentxu Lanceros-Mendez
机构：
[1] Universidade do Porto,
[2] Faculdade de Engenharia,undefined
[3] Laboratório de Catálise e Materiais (LCM),undefined
[4] LSRE/LCM - Laboratório Associado,undefined
[5] Centro/Departamento de Física da Universidade do Minho,undefined
来源：
Nanoscale Research Letters | / 6卷
关键词：
Percolation Threshold; Surface Group; Dielectric Response; Vinylidene Fluoride; Composite Conductivity;
D O I：
暂无
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学科分类号：
摘要：
Commercial multi-walled carbon nanotubes (CNT) were functionalized by oxidation with HNO3, to introduce oxygen-containing surface groups, and by thermal treatments at different temperatures for their selective removal. The obtained samples were characterized by adsorption of N2 at -196°C, temperature-programmed desorption and determination of pH at the point of zero charge. CNT/poly(vinylidene fluoride) composites were prepared using the above CNT samples, with different filler fractions up to 1 wt%. It was found that oxidation reduced composite conductivity for a given concentration, shifted the percolation threshold to higher concentrations, and had no significant effect in the dielectric response.
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