Abstract
Two conductive carbon materials, one with a beaded-like structure (carbon black, ECP) and another with tube-like structure (functionalized multi-walled carbon nanotubes, FMWCNTs), were added into a poly(amide-imide) (PAI) matrix. Combining the advantages of ECP (good compatibility) and FMWCNT (high conductivity), the conductivity was improved from 3.7 S m−1 for PAI/FMWCNT polymer composites to 100 S m−1 for PAI/FMWCNT/ECP ternary conductive polymer composites, much higher than that of the sum of PAI/ECP and PAI/FMWCNT. The tensile strength increased from 40 to 70 MPa. The improved conductive and mechanical properties were mainly due to much more intensive conductive network produced in the PAI/FMWCNT/ECP ternary composites, which is useful for electron flow and stress spread. The number of hydrogen bond was increased by adding ECP into PAI/FMWCNT binary composites, and played an important role in forming the unique morphology as evident by Fourier transform infrared spectrometry (FTIR) and X-ray diffraction (XRD) measurements. These conductive composites have potential for flexible electronic applications.
Funding source: Postgraduate Research & Practice Innovation Program of Jiangsu Province
Award Identifier / Grant number: SJCX20_0976
Funding source: Double Plan of Jiangsu Province
Award Identifier / Grant number: 2016
Funding source: Natural Science Foundation of Jiangsu Province
Award Identifier / Grant number: BK20160280
Author contribution: All the authors have accepted responsibility for the entire content of this submitted manuscript and approved submission.
Research funding: This work was supported by the Natural Science Foundation of Jiangsu Province (BK20160280), Double Plan of Jiangsu Province (2016), and Postgraduate Research & Practice Innovation Program of Jiangsu Province (SJCX20_0976).
Conflict of interest statement: The authors declare no conflicts of interest regarding this article.
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