Parallel carbon nanotube stripes in polymer thin film with tunable microstructures and anisotropic conductive properties
writer：Jinrui Huang, Yutian Zhu*, Wei Jiang, Qingxin Tang
keywords：Polymer-matrix composites, Electrical properties
source：期刊
specific source：Composites: Part A
Issue time：2015年
It is known that shear-flow can induce units to assemble into vorticity-aligned stripe-structures in confined
geometries. This study shows that the microstructure and the property of the stripe in polymer thin
film can be well tuned by adjusting the viscosity ratio between dispersed phase and continuous phase.
Polypropylene (PP)/poly(styrene–ethylene/butadiene–styrene) (SEBS)/octadecylamine functionalized
multiwalled carbon nanotubes (ODA-MWCNTs) composites with different viscosity ratios were prepared
by either pre-compounding ODA-MWCNT into PP or SEBS in a microcompounder. Under the induction of
shear-flow, ODA-MWCNT and SEBS spontaneously assembled into vorticity-aligned stripes in PP thin
films for all the composites with different viscosity ratios, resulting in the property of conductive anisotropy
for the film. Interestingly, it was found that both the microstructures and the electrical properties of
MWCNT stripes in PP thin films prepared from the composites with different viscosity ratios were significantly
different.