Strain sensing behavior of conductive polymer composites under corrosion fatigue

International Journal of Mechanical Sciences, Journal Year: 2025, Volume and Issue: 288, P. 110034 - 110034

Published: Jan. 31, 2025

Language: Английский

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Enhancing Radiation Shielding Capabilities with Epoxy-Resin Composites Reinforced with Coral-Derived Calcium Carbonate Fillers

Polymers, Journal Year: 2025, Volume and Issue: 17(1), P. 113 - 113

Published: Jan. 4, 2025

This study investigates the development of epoxy–resin composites reinforced with coral-derived calcium carbonate (CaCO3) fillers for enhanced radiation shielding and mechanical properties. Leveraging high content density coral, were prepared filler weight fractions 0%, 25%, 50%. SEM EDS analyses revealed that higher concentrations (50%) increased particle agglomeration, affecting matrix uniformity. Mechanical testing showed while tensile flexural strengths decreased content, compressive strength significantly improved, reaching 135 MPa at a 50% coral content. Radiation evaluations demonstrated attenuation achieving 39.63% absorption 60 kVp composite. However, efficiency was notably lower compared to lead, which achieves over 99% similar energy levels. These quantitative comparisons highlight material’s limitations in high-radiation environments but emphasize its suitability moderate applications. Despite their efficiency, provide an environmentally friendly non-toxic alternative aligning sustainability goals. Future work should focus on optimizing dispersion, mitigating exploring hybrid systems enhance The further evaluation parameters such as Zeff cross-sections is recommended comprehensively assess performance.

Language: Английский

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Polymer and graphene quantum dots derived nanocomposites: Fundamentals, characteristics, processing and applications

Elsevier eBooks, Journal Year: 2025, Volume and Issue: unknown, P. 41 - 62

Published: Jan. 1, 2025

Language: Английский

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Prediction of Tribological Properties of PC‐PBT/GNP‐MWCNT Nanocomposites Using Machine Learning Models

Journal of Applied Polymer Science, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 8, 2025

ABSTRACT This study investigates the effect of incorporation multi‐walled carbon nanotubes (MWCNTs) and graphene nanoplatelets (GNPs) in polycarbonate‐poly(butylene terephthalate) (PC‐PBT) blends on mechanical tribological blend properties. PC‐PBT/GNP‐MWCNT nanocomposites were synthesized via melt‐compounding with various filler loadings (0.5, 1, 3, 5, 7 wt.%). SEM analyses revealed adequate dispersion strong interaction between nano‐fillers polymer matrix. Mechanical testing demonstrated up to ~16%, ~38%, ~9% improvement tensile modulus, bending impact strength, respectively, optimum nano‐filler fraction 0.5 wt. %. Tribological assessments, conducted using a pin‐on‐disc apparatus, showed marked reductions specific wear rates (SWRs) reaching ~87% at optimal loading wt.%. The behavior was found depend primarily state, whereas properties be dictated by transfer film formation mechanism facilitated addition. experimental results corroborated Random Forest machine learning model yielding highest accuracy R 2 = 0.94 for modulus estimations 0.82 SWR under 10 N load.

Language: Английский

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Preparation of antistatic slow rebound polyurethane foam based on dimethyl octadecyl hydroxy ethyl ammonium nitrate intercalated reduced graphene oxide/carbon black antistatic system

Polymer Engineering and Science, Journal Year: 2025, Volume and Issue: unknown

Published: March 16, 2025

Abstract Slow rebound polyurethane foam (SPUF) has developed rapidly because of its excellent performance in sound insulation, energy absorption, and tactile sensation. However, the friction‐induced electrostatic charge accumulation occurs easily due to high resistivity. In this paper, dimethyl octadecyl hydroxy ethyl ammonium nitrate (SN) intercalated reduced graphene oxide (SN‐RGO) were prepared as conductive agent. The antistatic slow (ASR‐PUF) was with SN‐RGO/carbon black system silicone‐modified polyethylene glycol (Si‐APEG) low temperature resistant structures SN‐RGO investigated by Fourier transform infrared spectra (FT‐IR), wide‐angle X‐ray diffraction (WAXD), scanning electron microscope (SEM), respectively. effects on structures, mechanical properties, low‐temperature resistance, property ASR‐PUF studied. It found that acts heterogeneous cell nucleating agent, which slightly increases apparent core density decreases porosity ASR‐PUF. addition both tensile strength elongation at break ASR‐PUF, little effect sensitive index. surface resistance 1.1 × 10 8 Ω a content 4 wt%, thereby achieving an effect. Highlights agent PU foaming. provide good properties without affecting appropriate exhibits comprehensive performance.

Language: Английский

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Polydopamine‐coated iron‐nickel alloy and epoxy composites for electromagnetic interference shielding

Journal of Applied Polymer Science, Journal Year: 2024, Volume and Issue: unknown

Published: Sept. 7, 2024

Abstract With the development of electronic devices and wireless communication technology, quality human life has improved. However, shielding from electromagnetic interference (EMI) is required due to device malfunctions harmful effects on health. Polymer‐based materials getting much attention their light weight, flexibility, good processability, other desirable traits. achieving consistent dispersion conductive fillers optimizing balance between electrical, mechanical, thermal properties remain challenges despite advantages polymer‐based materials. Especially, epoxy resins are promising polymer for EMI applications excellent mechanical strength, chemical resistance, adhesive properties. Additionally, resin exhibits remarkable processability allowing various fabrication techniques such as casting, molding, three‐dimensional printing. one significant drawbacks difficulty in uniform within matrix. In this study, we propose an iron‐nickel alloy (FeNi) embedded matrix (FeNi/Epoxy) material. It manufactured by facile process epoxy, which processability. effectiveness at 12 GHz enhanced 9.12 17.86 dB increase FeNi concentrations. Furthermore, were improved concentration. Thermal conductivity efficient heat dissipation increased 0.63 1.49 Wm −1 K . Moreover, polydopamine (PDA) was employed a surface coating material overcome non‐uniform particles Surface PDA significantly uniformity strengthened adhesion filler Elastic modulus greatly 83.03 MPa 1.29 GPa coating. The enhancement derived bonds

Language: Английский

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Investigating compatibilization of polyoxymethylene/styrene-butadiene-styrene immiscible blend through addition of hydroxylated graphene

Scientific Reports, Journal Year: 2024, Volume and Issue: 14(1)

Published: Oct. 21, 2024

The main objective of this work was to use hydroxyl-functionalized graphene as a compatibilizer for an immiscible blend. A neat polyoxymethylene/styrene-butadiene-styrene binary blend prepared at constant ratio (80/20) and then compounded with different loading amounts (0.25, 0.5, 0.75, 1 wt%). formation droplet-matrix morphology during blending observed in microscopy images. deep understanding the compatibility inspected through studying mechanical, rheological, microstructural properties. By inspecting localization nanoparticles, triple functions compatibilizing/reinforcing/lubricating agent were elucidated. mechanical properties showed that best ultimate performance related nanocomposite containing 0.25 wt%. Furthermore, electrical conductivity nanocomposites investigated. Thermodynamic/kinetic studies tendency disperse droplets, however value increases, probability its presence matrix also creating conductive pathways purposes. lowest resistance highest volume (8.4 × 10

Language: Английский

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Development of high sensitivity composite sensors for proprioceptive applications

Nano Trends, Journal Year: 2024, Volume and Issue: 7, P. 100046 - 100046

Published: July 6, 2024

This study describes the fabrication of extremely sensitive piezoresistive composite sensors designed to detect human motion and speech. Starting out, a solution thermoplastic polyurethane (TPU) was formed in dimethyl formamide (DMF) with concentration 35 % weight volume. The subsequently spun using custom-built centrifugal spinning setup produce TPU fibers. Following their through spinning, fibers were immersed carbon nanoparticles (CNPs) dispersed tetra hydrofuran (THF), having 25 %w/v, for dip coating CNPs. resulted formation highly strain sensing capability. These then into form yarn tested as sensor proprioceptive applications. exhibited exceptional repeatability tests involving continuous stretching relaxing more than 5000 cycles. demonstrated remarkable extensibility well. attached different body parts such elbow, knees, fingers, ankles track motion. It found that could measure angle, position, frequency all these scenarios. sensor's sensitivity allowed it spoken words letters, addition recognizing action swallowing humans. results show newly developed are suitable speech recognition applications soft robotics, wearable devices, human-machine interactions.

Language: Английский

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Assessment of Thermal and Electrical Conductivity Enhancements in PC-PBT Blends Reinforced with Hybrid MWCNT-GNP Nanofillers

Journal of Polytechnic, Journal Year: 2024, Volume and Issue: unknown

Published: Nov. 17, 2024

This study aims to examine the improvement of thermal properties and electrical conductivity PC-PBT blends through reinforcement with hybrid MWCNT-GNP nanofillers via melt-mixing. Differential scanning calorimetry (DSC) thermogravimetric analysis (TGA) showed that incorporation increased crystallinity blends. On other hand, a marginal decline in stability was observed case higher filler concentrations which ascribed phase transitions within polymer matrix. A conductive network achieved 5% wt. weight fraction, notable reduction 7 % attributed agglomeration effects. These findings reveal importance optimizing nanofiller concentration achieve superior performance nanocomposites.

Language: Английский

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Next Generation of 3D‐Printed Electronics: Electroplating Inside Channels to Embed 3D Copper Features within Polymeric Structures Fabricated Through Material Extrusion

Advanced Materials Technologies, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 10, 2024

Abstract Material Extrusion (MEX) 3D printing has been largely employed to process electrically conductive polymers fabricate electronic components, which still suffer from bad performance due high electrical resistance. The electroplating is proven drastically reduce the resistance by depositing a thin layer of copper on top polymer; however, this method comes with price pay: only external features can be plated copper. present research paper presents an innovative solution overcome issue performing inside 3D‐printed parts plate internal layers (inaccessible for purposes traditional approaches) Electroplating closed channels performed: remarkable reduction in 5 orders magnitude (from 2300 up 0.08 Ω) achieved tracks. proposed approach also implemented “on board” commercial MEX machine assembly‐free smart structure sensor completely embedded within dielectric material (improved compared counterpart). Furthermore, fully not planar tracks but such as coils. unlocks fabrication functional devices elements extruding through Additive Manufacturing.

Language: Английский

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