Effect of Nanofiller Geometry on Network Formation in Polymeric Nanocomposites: Comparison of Rheological and Electrical Properties of Multiwalled Carbon Nanotube and Graphene Nanoribbon

被引：73

作者：

Sadeghi, Soheil ^{[1
]}

Arjmand, Mohammad ^{[1
]}

Navas, Ivonne Otero ^{[1
]}

Yazdi, Alireza Zehtab ^{[1
]}

Sundararaj, Uttandaraman ^{[1
]}

机构：

[1] Univ Calgary, Dept Chem & Petr Engn, 2500 Univ Dr NW, Calgary, AB T2N 1N4, Canada

来源：

MACROMOLECULES | 2017年 / 50卷 / 10期

基金：

加拿大自然科学与工程研究理事会;

关键词：

THERMAL-PROPERTIES; MECHANICAL-PROPERTIES; TRANSPORT-PROPERTIES; COLLOIDAL GELS; MICROSTRUCTURE; CONDUCTIVITY; COMPOSITES; SHEAR; PERMITTIVITY; PERCOLATION;

D O I：

10.1021/acs.macromol.7b00702

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

The present work reveals results on the network formation of graphene nanoribbon (GNR) synthesized using a nonoxidative technique from multiwalled carbon nanotube (MWCNT). MWCNT and GNR presented comparable powder conductivity and dispersion state in a poly(vinylidene fluoride) (PVDF) matrix. This enabled us to purely discern the effect of geometrical features of the nanofillers on network formation by comparing the rheological and electrical percolation in the PVDF matrix. Unique features of the rheological response of PVDF/ GNR nanocomposites, such as abrupt transition to a solid state, were interpreted according to a network structure activated by the formation of primary and secondary entanglements between adsorbed and bulk polymer chains. However, MWCNT nano composites presented a rheological behavior consistent with a strongly flocculated network structure formed through the direct tube tube contacts and mechanical entanglements. Poor broadband electrical conductivity of the GNR nanocomposites compared to their MWCNT counterparts confirmed our conclusion from the rheological results.

引用

页码：3955 / 3968

页数：14

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