Aramid nanofiber-reinforced thermotropic polyarylate nanocomposites with improved thermal and long-term mechanical performance

Eom, Tae-Gyeong; Tang, Feng; Seo, Minyoung; Kim, Seok-Ju; Song, Young-Gi; Park, Jin-Hyeok; Jeong, Young Gyu

doi:10.1007/s10853-023-08933-2

J Mater Sci

2023

DOI: 10.1007/s10853-023-08933-2

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Aramid nanofiber-reinforced thermotropic polyarylate nanocomposites with improved thermal and long-term mechanical performance

Tae-Gyeong Eom,

Feng Tang,

Minyoung Seo

et al.

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Cited by 2 publications

References 53 publications

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Reduced graphene oxide‐reinforced unsaturated polyester resin nanocomposites with improved thermal stability, mechanical modulus, and electromagnetic interference shielding performance

Park,

Kim,

Eom

et al. 2023

J of Applied Polymer Sci

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This article aims to investigate the impact of reduced graphene oxide (RGO) nanofillers on the curing kinetics, thermal stability, mechanical modulus, electrical conductivity, and EMI shielding effectiveness of unsaturated polyester resin (UPR). The curing rates of UPR/styrene (60/40 by wt%) mixtures with small amounts of RGO (0.1–0.3 wt%) exhibit slight delays owing to the barrier and scavenger roles of 2‐dimensional RGO sheets. Nonetheless, it is observed that within the cured nanocomposites, RGOs are effectively dispersed and firmly bonded to the UPR matrix at interfaces through hydrogen bonding and π‐π interactions. Consequently, the nanocomposites display heightened thermal decomposition temperatures and increased residue at 800°C with higher RGO loading content. The addition of RGO notably improves the elastic storage modulus and increases the temperature associated with glass transition‐related relaxation. The electrical percolation threshold is attained at a specific RGO loading between 0.2 and 0.3 wt%. Thus, the nanocomposite with 0.3 wt% RGO is characterized to have an electrical conductivity of 1.9 × 10−6 S/cm and an EMI shielding effectiveness of ~9 dB at 8 GHz, for a thickness of 1 mm.

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Reduced graphene oxide‐reinforced unsaturated polyester resin nanocomposites with improved thermal stability, mechanical modulus, and electromagnetic interference shielding performance

Park,

Kim,

Eom

et al. 2023

J of Applied Polymer Sci

Self Cite

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Nacre-like Anisotropic Multifunctional Aramid Nanofiber Composites for Electromagnetic Interference Shielding, Thermal Management, and Strain Sensing

Dong,

Lin,

Zhang

et al. 2024

Molecules

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Developing multifunctional flexible composites with high-performance electromagnetic interference (EMI) shielding, thermal management, and sensing capacity is urgently required but challenging for next-generation smart electronic devices. Herein, novel nacre-like aramid nanofibers (ANFs)-based composite films with an anisotropic layered microstructure were prepared via vacuum-assisted filtration and hot-pressing. The formed 3D conductive skeleton enabled fast electron and phonon transport pathways in the composite films. As a result, the composite films showed a high electrical conductivity of 71.53 S/cm and an outstanding thermal conductivity of 6.4 W/m·K when the mass ratio of ANFs to MXene/AgNWs was 10:8. The excellent electrical properties and multi-layered structure endowed the composite films with superior EMI shielding performance and remarkable Joule heating performance, with a surface temperature of 78.3 °C at a voltage of 2.5 V. Additionally, it was found that the composite films also exhibited excellent mechanical properties and outstanding flame resistance. Moreover, the composite films could be further designed as strain sensors, which show great promise in monitoring real-time signals for human motion. These satisfactory results may open up a new opportunity for EMI shielding, thermal management, and sensing applications in wearable electronic devices.

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Aramid nanofiber-reinforced thermotropic polyarylate nanocomposites with improved thermal and long-term mechanical performance

Cited by 2 publications

References 53 publications

Reduced graphene oxide‐reinforced unsaturated polyester resin nanocomposites with improved thermal stability, mechanical modulus, and electromagnetic interference shielding performance

Reduced graphene oxide‐reinforced unsaturated polyester resin nanocomposites with improved thermal stability, mechanical modulus, and electromagnetic interference shielding performance

Nacre-like Anisotropic Multifunctional Aramid Nanofiber Composites for Electromagnetic Interference Shielding, Thermal Management, and Strain Sensing

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