Characterizing Cryptostegia grandiflora stem fiber for reinforcing lightweight polymer composites: A comprehensive study of its physical, chemical, and thermal properties

Proceedings of the Institution of Mechanical Engineers Part E Journal of Process Mechanical Engineering, Journal Year: 2024, Volume and Issue: unknown

Published: June 5, 2024

This study aimed to characterize Cryptostegia grandiflora stem fiber (CGSF) as a potential reinforcement material for lightweight polymer composites. Natural fiber-reinforced materials have gained attention promising alternative synthetic fibers due their comparable strength and modulus, lack of harmful chemicals. The physical, chemical, thermal properties CGSF were investigated through roughness, chemical measurement, physical Fourier transform infrared spectroscopy, XRD, water absorption, thermogravimetric analysis, SEM conformation analysis. results showed that has high cellulose content (80.3 wt.%) specific strength, making it suitable use in Its flaky layered outer surface provides its low microfibril angle observed electron microscopy strong bonding qualities. also demonstrated improved heat stability up 254–387 °C meeting the requirements polymerization. These findings demonstrate natural

Language: Английский

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Electrical insulation and dielectric properties of aramid fiber reinforced epoxy composites under mechanical stress

Composites Science and Technology, Journal Year: 2024, Volume and Issue: 255, P. 110733 - 110733

Published: June 28, 2024

Language: Английский

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Constructing aramid nanofibers self-assembly structure on fiber surface with electric field-assisted enhances insulation performance of aramid fiber reinforced epoxy resin

Applied Surface Science, Journal Year: 2025, Volume and Issue: unknown, P. 163341 - 163341

Published: April 1, 2025

Language: Английский

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Impact of Defect Structures on Interfacial and Insulation Properties in Epoxy-Impregnated Aramid Paper

IEEE Transactions on Dielectrics and Electrical Insulation, Journal Year: 2024, Volume and Issue: 31(4), P. 1815 - 1822

Published: March 27, 2024

This study investigates the impact of interface defects on electrical performance epoxy-impregnated aramid papers. Various composites with different degrees were prepared and analyzed for their structural, mechanical, partial discharge, insulation performance. The results demonstrate widespread presence void in composites, negatively affecting paper compactness, mechanical properties, initial discharge voltage, leading to significant gas gap phenomena. In terms performance, severe exhibit a 40-fold increase low-frequency dielectric loss, 16-fold conductivity, up 64% reduction breakdown field strength, along noticeable shallowing charge traps. Phase modeling electro-thermal reveals that void-type guide trajectories, causing lateral damage diffusion, localized overheating, electric distortion, ultimately endangering voltage resistance. provides research support application as matrix novel insulating paper.

Language: Английский

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Effect characteristics of ANFs/SiO2 layer self-assembly on the insulation properties of aramid/epoxy composites

Journal of Physics D Applied Physics, Journal Year: 2024, Volume and Issue: 57(47), P. 475301 - 475301

Published: Aug. 29, 2024

Abstract Aramid fiber (AF)-reinforced epoxy (EP) resin composite materials are widely used in the application of insulation rod-reinforced components, but adhesion performance between AFs and EP is poor, which easily leads to interfacial defects even gradually develops into breakdown, flashover, other faults. In this study, a simple, environmentally friendly, diverse, highly designable layer-by-layer self-assembly modification method was adopted assemble aramid nanofibers/SiO 2 onto surface AFs. The modified were then produce with resin. By testing interface leakage current AF/EP materials, influence mechanism AF on material studied. results show that first increases decreases increase number assembled layers, maximum breakdown voltage being 93.56% flashover 30.91%.

Language: Английский

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Molecular dynamics study on structural modulation and dyeing property optimization of meta-aramid in a DMSO/electrolyte system

Journal of Colloid and Interface Science, Journal Year: 2024, Volume and Issue: 678, P. 732 - 741

Published: June 21, 2024

Language: Английский

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Interface engineering via non-thermal atmospheric plasma for highly tensile insulating epoxy-impregnated aramid composite paper

Composites Science and Technology, Journal Year: 2024, Volume and Issue: 257, P. 110844 - 110844

Published: Sept. 3, 2024

Language: Английский

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Preparation of Abd-@Mmt Nano-Flame Retardant Towards Fire-Safety and Stable Mechanical Properties for Aramid-Reinforced Epoxy Resin Composites

Published: Jan. 1, 2024

Language: Английский

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Effect of O radicals on aramid surface treatment: Experimental and molecular insights

Applied Physics Letters, Journal Year: 2024, Volume and Issue: 125(17)

Published: Oct. 21, 2024

Aramid is widely recognized for its effectiveness as a matrix in high-performance composite materials. However, the inert nature of surface necessitates plasma pretreatment proper resin immersion. With particular focus on interactions involving O radicals, this study employs Vacuum Ultra-Violet Photolysis Reactive-species Supply to investigate interaction mechanisms between aramid and reactive species. The water contact angle serves an indicator degree reactions, demonstrating clear correlation reduction concentration radicals. Analysis using ATR-FTIR XPS revealed depletion amide groups formation hydroxyl during treatment process. Through molecular dynamics simulations, we identified specific reaction sites quantified variations typical products. We also summarized pathways confirmed generation polar structures, such N-OH. This offers valuable theoretical insights modification polymers contributes advancements industrial technology.

Language: Английский

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