The Entangled Conductive Structure of CB/PA6/PP MFCs and Their Electromechanical Properties

In this work, carbon black (CB)/polyamide 6 (PA6)/polypropylene (PP) microfibrillar composites (MFCs) were fabricated through an extrusion (hot stretching) heat treatment process. The CB-coated conductive PA6 microfibrils with high aspect ratio were in situ generated as a result of the selective acc...

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Bibliographic Details
Published in:Polymers 2021-03, Vol.13 (6), p.961
Main Authors: Wang, Yu, Liu, Song, Zhu, Huihao, Ji, Huajian, Li, Guo, Wan, Zhou, Ma, Yulu, Xie, Linsheng
Format: Article
Language:English
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Summary:In this work, carbon black (CB)/polyamide 6 (PA6)/polypropylene (PP) microfibrillar composites (MFCs) were fabricated through an extrusion (hot stretching) heat treatment process. The CB-coated conductive PA6 microfibrils with high aspect ratio were in situ generated as a result of the selective accumulation of CB at the interface. At the proper temperature, a 3D entangled conductive structure was constructed in the PP matrix, due to topological entanglement between these conductive microfibrils. This unique conductive structure provided the PP composites with a low electrical conductivity percolation threshold. Moreover, the electromechanical properties of conductive MFCs were investigated for the first time. A great stability, a high sensitivity and a nice reproducibility were achieved simultaneously for CB/PA6/PP MFCs. This work provides a universal and low-cost method for the conductive polymer composites' (CPCs) fabrication as sensing materials.
ISSN:2073-4360
2073-4360
DOI:10.3390/polym13060961