A model for effective conductivity of polymer nanocomposites containing MXene nanosheets DOI Creative Commons

Zahra Hadi,

Jafar Khademzadeh Yeganeh, Yasser Zare

et al.

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

Published: Feb. 2, 2025

Abstract This paper introduces a groundbreaking model to evaluate the conductivity of nanocomposites comprising MXene nanosheets. The simulates effective considering dimensions, volume fraction, interphase thickness, percolation threshold, contact distance, and tunneling resistance. model's predictions align well with empirical results obtained various laboratory samples. scrutiny elements impacting is affirmed, given assumption resistance operation MXene/interphase network. Slender nanosheets expansive contacts lead an elevated level conductivity. Moreover, shows direct correlation loading, while higher onset produces poorer Based on outputs, insulative nanocomposite identified via thinnest ( < 1 nm), thickest t > 4 smallest fraction 0.01), lowest percentage networked 0.05). Contrariwise, most remarkable as 25.6 S/m attained by = nm). In addition, narrowest tunnels (tunneling distance nm) yield uppermost 6.2 in system. Highlights study proposes for polymer nanocomposites. size, depth, are considered. agree experimental data several A bigger area thicker interphase. (1 produce S/m.

Language: Английский

Insulating electromagnetic-shielding silicone compound enables direct potting electronics DOI
Xinfeng Zhou, Peng Min, Yue Liu

et al.

Science, Journal Year: 2024, Volume and Issue: 385(6714), P. 1205 - 1210

Published: Sept. 12, 2024

Traditional electromagnetic interference–shielding materials are predominantly electrically conductive, posing short-circuit risks when applied in highly integrated electronics. To overcome this dilemma, we propose a microcapacitor-structure model comprising conductive fillers as polar plates and intermediate polymer dielectric layer to develop insulating composites. The electron oscillation dipole polarization layers contribute the reflection absorption of waves. Guided by this, synergistic nonpercolation densification enhancement enable our composite combine high resistivity, shielding performance, thermal conductivity. Its feature allows for direct potting into crevices among assembled components address compatibility heat-accumulation issues.

Language: Английский

Citations

63
Fluorine‐free synthesis of ultra‐thin, high aspect ratio Ti3C2Tx MXene nanosheets for high‐efficiency ultraviolet‐shielding applications DOI Open Access

Huolin Zhong,

Hui Fang, Yan Zhao

et al.

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

Published: March 2, 2025

Abstract MXenes, two‐dimensional transition metal carbides and nitrides, show great potential in various applications. However, traditional synthesis methods often involve toxic fluorine‐containing etchants, limiting large‐scale production. This study introduces a novel, environmentally friendly approach for synthesizing Ti 3 C 2 T x MXene nanosheets using stone grinding‐assisted exfoliation mild alkaline etching at 80°C. The synthesized exhibited high aspect ratios with transverse dimensions mostly on the micrometer scale thickness of approximately nm, corresponding to one two layers . MXene/polyvinyl alcohol (PVA) composite membranes were fabricated demonstrate practical membrane containing 1 wt% achieved 99.9% UV shielding rate while maintaining 67% visible light transmittance. Furthermore, it significantly enhanced PLA's resistance, protected samples retaining 98.1% tensile strength after 48 hours exposure, compared 47.8% unprotected PLA. fluorine‐free method addresses environmental concerns enables production advanced protection Highlights is made via grinding etching. are produced micron range 1–2 thick. green, MXene. MXene/PVA films 99.99% coating improves keeping strength.

Language: Английский

Citations

1
Understanding Thermal Conductivity of Polymer Composites with Hybrid Fillers: A Molecular Dynamics Simulation Study DOI
Ruihua Wang, Hengheng Zhao,

Tongkui Yue

et al.

ACS Applied Polymer Materials, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 8, 2025

Efficient thermal management is very critical for the performance and longevity of modern electronic devices, making development high conductivity materials essential. In this work, effect nanoparticle/nanosheet hybrid fillers on polymer nanocomposites (PNCs) was explored by using coarse-grained molecular dynamics (CGMD) simulation. First, effects nanosphere composites were studied in terms filling fraction, size, physical interfacial interaction. The results show that maximum probability achieved with a smaller particle larger stronger matrix–filler addition, we further examined hybrid-filled composites, dispersion state fillers, contribution two filler components to formation network. Compared PNCs single type filler, filled nanoparticles/nanosheets exhibit superior conduction lower percolation threshold, which attributed fact addition nanoparticles promotes sheets networks. By controlling filler–matrix interaction nanoparticles, can also be modified. conclusion, study deepens our understanding how form network between sheets, providing theoretical guidance more efficient polymeric materials.

Language: Английский

Citations

0
Ultrahigh Thermal Conductivity of Epoxy/Ag Flakes/MXene@Ag Composites Achieved by In Situ Sintering of Silver Nanoparticles DOI
Tao Chen, Li Liu, Liping Han

et al.

Langmuir, Journal Year: 2024, Volume and Issue: 40(23), P. 12059 - 12069

Published: May 31, 2024

The growing use of high-power and integrated electronic devices has created a need for thermal conductive adhesives (TCAs) with high conductivity (TC) to manage heat dissipation at the interface. However, TCAs are often limited by contact resistance interface between materials. In this study, we synthesized MXene@Ag composites through direct in situ reduction process. Ag nanoparticles (Ag NPs) generated MXene interlayer surface formed effective thermally pathways flakes within an epoxy resin matrix. Various characterization analyses revealed that adding concentration 3 wt % resulted remarkable TC 40.80 W/(m·K). This value is 8.77 times higher than achieved 7.9 filler alone. improved attributed sintering reduced NPs during curing process, which connection (a highly material) flakes, thereby reducing resistance. significantly enhanced materials (TIMs). study presents novel approach developing exceptionally TC, opening new possibilities design fabrication advanced management systems.

Language: Английский

Citations

3
A model for effective conductivity of polymer nanocomposites containing MXene nanosheets DOI Creative Commons

Zahra Hadi,

Jafar Khademzadeh Yeganeh, Yasser Zare

et al.

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

Published: Feb. 2, 2025

Abstract This paper introduces a groundbreaking model to evaluate the conductivity of nanocomposites comprising MXene nanosheets. The simulates effective considering dimensions, volume fraction, interphase thickness, percolation threshold, contact distance, and tunneling resistance. model's predictions align well with empirical results obtained various laboratory samples. scrutiny elements impacting is affirmed, given assumption resistance operation MXene/interphase network. Slender nanosheets expansive contacts lead an elevated level conductivity. Moreover, shows direct correlation loading, while higher onset produces poorer Based on outputs, insulative nanocomposite identified via thinnest ( < 1 nm), thickest t > 4 smallest fraction 0.01), lowest percentage networked 0.05). Contrariwise, most remarkable as 25.6 S/m attained by = nm). In addition, narrowest tunnels (tunneling distance nm) yield uppermost 6.2 in system. Highlights study proposes for polymer nanocomposites. size, depth, are considered. agree experimental data several A bigger area thicker interphase. (1 produce S/m.

Language: Английский

Citations

0