Fabrication of Polymer Film with Extraordinary Conductive Anisotropy by Forming Parallel Conductive Vorticity-Aligned Stripes and Its Formation Mechanism.
writer：Jinrui Huang , * Junbao Xu , Yuping Sheng , Yutian Zhu , * Wei Jiang , Donghua Xu , Qingxin Tang
keywords：///
source：期刊
specific source：Macromol. Mater. Eng. 2016, 301, 743?749.
Issue time：2016年
n this work, anisotropic conductive fi lm (ACF) is fabricated by shear-fl ow induced assembly.
It is found that an appropriate content of carbonaceous fi ller is needed for forming wellordered parallel vorticity-aligned stripes and the content depends on the category of the fi ller. Interestingly, the lowest aspect ratio carbon black (CB) with lowest electrical conductivity is the best candidate for fabricating ACF. The fi lm with CB stripes shows excellent conductive
anisotropy: the electrical resistivity in the direction parallel to the CB stripes is almost eight
orders of magnitude lower than that in the perpendicular direction. The formation mechanism of the vorticity-aligned stripe is also investigated by the rheological measurement and the study of morphological evolution. It is found that the coalescence of dispersed phase or aggregates dominates the formation and growth of the stripe and negative value of the fi rst normal stress difference drives the stripe to align along the vorticity direction.