Abstract
AbstractIn this study, biobased polyamide/functionalized graphene oxide (PA‐FGO) nanocomposite is developed using sustainable resources. Renewable PA is synthesized via polycondensation of hexamethylenediamine (HMDA) and biobased tetradecanedioic acid. Furthermore, GO is functionalized with HMDA to improve its compatibility with biobased PA and in situ polymerization is employed to obtain homogeneous PA‐FGO nanocomposites. Compatibility improvement provides simultaneous increases in the tensile strength, storage modulus, and conductivity of PA by adding only 2 wt% FGO (PA‐FGO2). The tensile strength and storage modulus of PA‐FGO2 nanocomposite are enhanced dramatically by ≈50% and 30%, respectively, and the electrical conductivity reached 3.80 × 10–3 S m−1. In addition, rheology testing confirms a shear‐thinning trend for all samples as well as a significant enhancement in the storage modulus upon increasing the FGO content due to a rigid network formation and strong polymer‐filler interactions. All these improvements strongly support the excellent compatibility and enhanced interfacial interactions between organic–inorganic phases resulting from GO surface functionalization. It is expected that the biobased PA‐FGO nanocomposites with remarkable thermomechanical properties developed here can be used to design high‐performance structures for demanded engineering applications.
Highlights
The free amine groups on the surface of functionalized GO (FGO) are expected to participate in polymerization with diacid during in situ polymerization and polymerization may occur between the graphene layers
The incorporation of 2 wt% FGO resulted in a remarkable increase in conductivity, which may be due to the formation of conductive networks by FGO
The rheology test results revealed a significant increase in the storage modulus of the matrix upon increasing the FGO content
Summary
Rheology testing confirms a shear-thinning trend for all interest academically and industrially due to improving the carbon footprint of plastic products and positively impacting their life-cycle evaluation.[4,5,6] On the other hand, nanofillers have been samples as well as a significant enhancement in the storage modulus upon used frequently for improving the meincreasing the FGO content due to a rigid network formation and strong polymer-filler interactions All these improvements strongly support the excellent compatibility and enhanced interfacial interactions between organic–inorganic phases resulting from GO surface functionalization. PA possesses excellent mechanical properties even at high and specific surface area.[10,11,12] High-performance PA/graphene nanocomposite leads to user-friendly end products for a wide range of applications, including fuel cells, supercapacitors, energy devices, automobiles, electronics, solar cell, gas detection, functional conducting electrodes for technical use, lithium-ion batteries, and so on.[13]
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