Functionalized Aluminum Nitride for Improving Hydrolysis Resistances of Highly Thermally Conductive Polysiloxane Composites

Nano-Micro Letters, Journal Year: 2025, Volume and Issue: 17(1)

Published: Feb. 6, 2025

Abstract A series of divinylphenyl-acryloyl chloride copolymers (PDVB- co -PACl) is synthesized via atom transfer radical polymerization employing tert-butyl acrylate and divinylbenzene as monomers. PDVB- -PACl utilized to graft on the surface spherical aluminum nitride (AlN) prepare functionalized AlN (AlN@PDVB- -PACl). Polymethylhydrosiloxane (PMHS) then used matrix thermally conductive AlN@PDVB- -PACl/PMHS composites with fillers through blending curing. The grafting synchronously enhances hydrolysis resistance its interfacial compatibility PMHS matrix. When molecular weight 5100 g mol −1 density 0.8 wt%, containing 75 wt% exhibit optimal comprehensive performance. thermal conductivity ( λ ) composite 1.14 W m K , which by 20% 420% compared simply physically blended AlN/PMHS pure PMHS, respectively. Meanwhile, display remarkable hydrothermal aging retaining 99.1% after soaking in 90 °C deionized water for 80 h, whereas decreases sharply 93.7%.

Language: Английский

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Polymer-based nanocomposites for supercapacitor applications: a review on principles, production and products

RSC Advances, Journal Year: 2025, Volume and Issue: 15(10), P. 7509 - 7534

Published: Jan. 1, 2025

The current advances in energy storage devices has necessitated the development of functional polymer-based nanocomposites for supercapacitor applications.

Language: Английский

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Advancing Thermal Safety System for Battery Pack: Introducing Intrinsic Flame‐Retardant Solid–Solid Phase Change Materials with Melamine Crosslink

Advanced Functional Materials, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 18, 2025

Abstract Composite phase‐change materials (CPCMs), with their substantial latent heat storage and release capabilities at a consistent transition temperature, are extensively employed in diverse thermal‐energy‐storage applications. However, the risk of thermal runaway remains significant challenge owing to flammability potential leakage CPCMs. Attempts develop flame‐retardant PCMs using various fireproof polymers through physical methods exist. In this study, novel multifunctional solid–solid material is developed chemical modification process, incorporating polyethylene glycol 2000, boric acid, phosphorus pentoxide (P 2 O 5 ), expanded graphite, ammonium polyphosphate (APP), melamine (MA). This composite exhibits superior flame retardancy stability, making it highly suitable for enhancing safety battery modules. Experimental results demonstrate that PCAM2, containing 20 wt% MA 8 APP, maintains 97.75% mass retention 250 °C h achieves V‐0 rating (burning stops within 10 s) according UL‐94 standard. Moreover, module PCAM2 demonstrated thermal‐management than three other Even after ten cycles 2C discharge rate, maintained peak operating temperature below 60 °C. Notably, CPCM films exhibited propagation time, indicating control ability inhibit runway. The intrinsically study holds considerable promise use next‐generation systems electric‐vehicle packs energy‐storage

Language: Английский

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Tuning the Work Function and Properties of the Conducting Polymer PEDOT:PSS for Enhancing Optoelectronic Device Performance of Solar Cells and Organic Light Emitting Diodes

Polymer-Plastics Technology and Materials, Journal Year: 2025, Volume and Issue: unknown, P. 1 - 27

Published: Jan. 6, 2025

Easy-to-fabricate, flexible optoelectronic devices based on conducting organic polymers are in high demand due to their cost-effectiveness and low weight. The hole electron transport layers (HTL/ELT) central the working of these devices. Conductive now extensively used (HTL/ETL) solar cells, as injection OLEDs, electrodes or active channel thin film transistors. Poly(3,4-ethylenedioxythiophene) polystyrene sulfonate (PEDOT:PSS) is mainstay energy levels tailored PEDOT:PSS determine work function, efficiency charge separation, device's performance. Transparent another requirement for efficient functioning devices, with indium tin oxide (ITO) being a common choice. To overcome problems associated ITO, researchers focusing polymer materials such transparent electrode materials. Flexibility, water processability, electrical conductivity, good optical transparency, biocompatibility, thermoelectric properties make functionalized versatile conductive polymer. Priced its versatility performance, it cutting-edge applications including LEDs, sensors. Cost-effective production easy scalability default material despite some challenges. This review highlights recent research special emphasis tuning function enhance performance

Language: Английский

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Preparation and molecular dynamics simulation of natural rubber thermal conductive composites reinforced with boron nitride modified by a hyperbranched coupling agent

Polymer Composites, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 21, 2025

Abstract The applications of thermal interface material (TIM) based on boron nitride (BN)‐filled polymer composites are often constrained by weak interfacial interactions between BN and the matrix. In this work, hyperbranched (H‐Si69) was synthesized polycondensation surface using a sulfur‐containing coupling agent. agent modified (g‐BN), natural rubber (NR)/g‐BN were prepared with higher conductivity mechanical properties. (0.665 W/mK), tensile strength (19.78 MPa), elongation at break (1091.8%) NR/g‐BN 19.6% volume fraction g‐BN 44.40%, 15.47%, 29.56% than those NR/BN composites, respectively. Furthermore, molecular dynamics (MD) simulation employed to calculate binding energy, free fraction, solubility parameter, properties composite system explore enhancement mechanism. combined results experiments MD indicated that exhibits strong NR matrix, significantly improving composites. This work provides method improve compatibility within offering insight for preparation TIMs high in electronic packaging devices. Highlights Boron modification. Natural Interface mechanism investigated simulation.

Language: Английский

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Polarized Raman spectroscopy for viscosity effect on the orientation degree and thermal conductivity of graphene nanoplatelet based composites

Materials Today Communications, Journal Year: 2025, Volume and Issue: unknown, P. 111819 - 111819

Published: Feb. 1, 2025

Language: Английский

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Heat Transfer in Composite Materials: Mechanisms and Applications

Published: Feb. 5, 2025

Understanding heat transfer in composite materials is essential for optimizing their performance critical applications across industries such as aerospace, automotive, renewable energy, and construction. This review offers a comprehensive examination of the various mechanisms within explores how these processes, spanning different length time scales, are influenced by materials’ composition structure. Both traditional advanced analytical numerical modeling techniques explored, emphasizing importance predicting thermal behavior scales. Furthermore, evaluates current experimental methods measuring properties, discussing limitations potential areas enhancement. Significant attention devoted to practical materials, from management electronic devices heat-resistant components aerospace engineering. Recent innovations, integration phase change development nano-enhanced composites, assessed transform capabilities. Ongoing challenges addressed, future research directions outlined, highlighting need advancements material science engineering meet emerging demands. aims bridge gap between fundamental applications, providing understanding that both rooted driven possibilities.

Language: Английский

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Flexible Hydrogel Phase Change Composite Materials for Thermal Management of Human Bodies and Electronic Devices

Published: Jan. 1, 2025

Language: Английский

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Polyvinyl alcohol/fluorographene/carboxylated multi-walled carbon nanotubes composites with excellent insulation and ultra-high thermal conductivity prepared by confined self-assembly

Applied Materials Today, Journal Year: 2025, Volume and Issue: 43, P. 102629 - 102629

Published: Feb. 14, 2025

Language: Английский

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Preparation and thermal performance tuning of multidimensional carbon-based microcapsule phase change composites

Acta Physica Sinica, Journal Year: 2025, Volume and Issue: 74(7), P. 0 - 0

Published: Jan. 1, 2025

To meet the requirements of both high thermal conductivity and substantial latent heat storage release in spacecraft management materials, this study employs a hot-pressing technique to fabricate multidimensional carbon-based, thermally enhanced microencapsulated phase change composite. This approach addresses limitations conventional which exhibit low propensity for liquid leakage. By integrating experimental assessments with finite element numerical simulations, we systematically investigated effects varying contents ratios flake graphite, pitch-based carbon fibers on composite’s properties, specifically heat. Furthermore, formation mechanism internal conduction network was elucidated.<br>The results indicate that introducing conductive materials into system, coupled optimization component composition structure, can establish continuous dense carbon-based network. Leveraging synergistic these employing multi-size graphite filling strategy significantly overall composite, reaching 1.021 W·m^-1·K^-1, while maintaining 81.540 J·g^-1. These findings provide theoretical practical guidance application advanced spacecrafts.

Language: Английский

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