Self-stabilized polyaniline@graphene aqueous colloids for the construction of assembled conductive network in rubber matrix and its chemical sensing application

Abstract

Facile dispersion and construction of graphene-based 3D conductive network in polymer matrix are highly attractive for the preparation of conductive polymer composites (CPCs) and flexible electronic devices. In this study, a simple and effective strategy for the fabrication of graphene-based assembled conductive network in natural rubber (NR) matrix is reported. Specifically, polyaniline@graphene nanohybrids were prepared by in situ reduction of graphene oxide using aniline as both reducing and stabilizing agents. The resulted self-stabilized polyaniline@graphene nanohybrids could well disperse in aqueous suspension by electrostatic repulsion. When homogenized with NR through latex assembly technique, they could be located in the interstitial space between the NR latex microspheres and organized into a continuous 3D hierarchical network. The as-prepared CPCs with this 3D conductive network exhibited a very low percolation threshold (3-fold lower than that of the conventional NR/graphene blends), enhanced electrical conductivity (up to 6 orders of magnitude improvement) and meanwhile excellent chemical sensing properties. This work provides a feasible approach to stabilize graphene

Transport performance in novel elastomer nanocomposites: Mechanism, design and control

“…3 . 3 S t i m u l u s -r e s p o n s i v e e l a s t o m e r s e n s o r s a n d a c t u a t o r s Stimuli-responsive elastomers refer to elastomers that can respond to external stimuli, such as electricity [21], strain [9,[158][159][160], temperature [161] and solvent [162][163][164], as indicated by electrical conductivity behavior.…”

Effect of Reaction Temperature on Structure, Appearance and Bonding Type of Functionalized Graphene Oxide Modified P-Phenylene Diamine

“…The chemical reduction of graphene oxide has been regarded as an effective way to achieve large-scale preparation of grapheme [ 8 , 9 , 10 ]. However, the addition of only hydrazine hydrates without other materials will likely result in aggregated graphene [ 11 , 12 ]. Therefore, the formation of monolithic and high-performance graphene will require further treatments besides the necessary reduction reaction.…”

Resistance-strain sensitive rubber composites filled by multiwalled carbon nanotubes for structuraldeformation monitoring

“…However, it is still difficult to achieve large deformation and good sensitivity simultaneously, which is important for the sensors used in deformation monitoring of rubber isolation bearings. Meanwhile, NR composite sensors modified by CNTs and other nanomaterials, such as graphene, have been widely studied and applied in stretch electrical devices, 29 chemical sensing, environmental pollution detection, 30,31 and tires. 20 However, NR composites applied to structural deformation monitoring in civil engineering have been rarely reported, especially the deformation monitoring of rubber isolation bearing.…”