Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7214936 | Composites Science and Technology | 2018 | 26 Pages |
Abstract
Conductive polymer composites featuring double-percolated network structures have attracted widespread interest. Constructing such a structure and controlling the trans-phase migration of the conductive filler remain the main challenges for the application of these conductive polymer composites. In this study, we report a novel two-step “in situ microfibrillation” and “microfiber coalescence” strategy that includes melt-drawing and a compressive annealing process to achieve a stable, double-percolated network of a polybutene-1 (PB-1)/polystyrene (PS)/multiwalled carbon nanotubes (MWCNTs) ternary system. Triggered by the compressive annealing treatment, inter-fiber coalescence led to the formation of an interconnected network, resulting in excellent conductive performance (volume resistivity down to 4.6 Ã 103 Ω·cm) with a MWCNT dosage as low as 1 wt%. Surface energy calculations and experimental evidence both indicated that the selective distribution of the MWCNTs in the PS phase resulted from the preferential surface wetting behavior and Ï-Ï interactions between the MWCNTs and PS, which also immobilized the MWCNTs, even at elevated temperatures. This work established a facile and scalable technology for constructing double-percolated structures in multiphase systems, thus providing access to intriguing functionalities and applications.
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Authors
Wei Liu, Yuanyi Yang, Min Nie,