Research and Analysis on Enhancement of Surface Flashover Performance of Epoxy Resin Based on Dielectric Barrier Discharge Plasma Fluorination Modification DOI Creative Commons

Xizhe Chang,

Yueyi Sui,

Changyu Li

et al.

Nanomaterials, Journal Year: 2024, Volume and Issue: 14(17), P. 1382 - 1382

Published: Aug. 24, 2024

To conquer the challenges of charge accumulation and surface flashover in epoxy resin under direct current (DC) electric fields, numerous efforts have been made to research dielectric barrier discharge (DBD) plasma treatments using CF4/Ar as medium gas, which has proven effective improving voltage. However, despite being an efficient etching medium, SF6/Ar remained largely unexplored. In this work, we constructed a DBD device with gas explored influence processing times flow rates on morphology voltage resin. The observed by SEM indicates that degree intensifies time rate, quantitative characterization AFM maximum roughness 144 nm after 3 min treatment. Flashover test results show at 2 time, reached 19.02 kV/mm, is 25.49% higher than untreated sample previously reported works. addition effect roughness, trap distribution shows fluorinated groups help deepen energy levels density. optimal modification was achieved rate 3.5 slm coupled time. Furthermore, density functional theory (DFT) calculations reveal fluorination introduces additional electron traps (0.29 eV) hole (0.38 eV), enhancing capture carriers suppressing flashover.

Language: Английский

Decoupling enhancements of breakdown strength and dielectric constant in PMIA-based composite films for high-temperature capacitive energy storage DOI
Wenqi Zhang, Xin Xu, Sidi Fan

et al.

Composites Part B Engineering, Journal Year: 2024, Volume and Issue: unknown, P. 112013 - 112013

Published: Nov. 1, 2024

Language: Английский

Citations

5
Closed loop recycling of electrically damaged meta-aramid papers with high electrical insulation and mechanical strength DOI
Fangcheng Lv,

Lvqian Fu,

Qibin Wang

et al.

Composites Science and Technology, Journal Year: 2024, Volume and Issue: 254, P. 110688 - 110688

Published: May 29, 2024

Language: Английский

Citations

4
Penguin feather-inspired flexible aerogel composite films featuring ultra-low thermal conductivity and dielectric constant DOI
Rui Yang, Kun Yu, Xiang Yu

et al.

Materials Horizons, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 1, 2025

Given extremely high porosity, aerogels have demonstrated remarkable advantages in serving as thermal insulation and wave-transparent materials. Unfortunately, their practical applications are greatly confined by inherent fragility. The recent emergence of polymer presents an ideal platform for the development flexible aerogel films. However, additional cross-linking agents necessitated constructing a robust structure, complicating production process. Herein, we report film based on meta-aramid composites, inspired porous structure penguin feathers. intermolecular hydrogen bonds function natural agents. Their disruption results dissolution fibers, while reconstruction facilitates localized rearrangement chains during sol-gel process, generating closed nanopores. Furthermore, fluorinated hollow glass microspheres filled, compressing nanopores situated near interface to 75-150 nm. This meets critical threshold required Knudsen effect, decreasing conductivity levels below that ambient air. At optimized doping ratio 3 wt%, is 21.6 mW m-1 K-1, achieving low dielectric constant 1.43. Simultaneously, films exhibit enhanced mechanical properties, also show benefits hydrophobicity, colorability, ultralightness, flame retardancy, making themselves multifunctional materials suitable applications.

Language: Английский

Citations

0
Polydopamine-Modified Boron Nitride Nanosheet/Polyimide Composites with Enhanced Thermal Conductivity and Electrical Insulation for High-Frequency Applications DOI
Yiwei Wang, Guan Wang, Zhang Li

et al.

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

Published: April 2, 2025

Language: Английский

Citations

0
Bioinspired Functional Composites for Enhanced Thermally Conductivity via Fractal-Growth CuNP Fillers DOI Creative Commons
Xiao Hou,

Fangming Shen,

Mingzhou Chen

et al.

ACS Applied Bio Materials, Journal Year: 2024, Volume and Issue: 7(9), P. 6297 - 6305

Published: Sept. 2, 2024

Thermal conduction for electronic devices has attracted extensive attention in light of the development 5G communication. Thermally conductive materials with high thermal conductivity and mechanical flexibility are extremely desirable practical applications. However, construction efficient interconnected pathways continuous networks is inadequate either processing or actual usage existing technologies. In this work, spherical copper nanoparticles (S-CuNPs) urchin-inspired fractal-growth CuNPs (U-CuNPs), thermally metal fillers induced by ionic liquids, were fabricated successfully through electrochemical deposition method. Compared to S-CuNPs, U-CuNPs shows larger specific surface contact area, thus making it easier build a pathway network corresponding U-CuNPs/liquid silicone rubber (LSR) composites. The optimal loading CuNP was determined evaluating rheological performance prepolymer properties performances When filler 150 phr, U-CuNPs/LSR produces (e.g., tensile strength modulus), (above 1000% improvement compared pure LSR), heating/cooling efficiency. enhanced also confirmed finite element analysis (FEA) overall temperature distribution, indicating that areas exhibit more advantages forming composites than promising competitive alternative traditional flexible interface materials.

Language: Английский

Citations

1
In-plane aligned doping pattern in electrospun PEI/MBene nanocomposites for high-temperature capacitive energy storage DOI
Sidi Fan,

Ding Ai,

Wenqi Zhang

et al.

Materials Horizons, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 28, 2024

To achieve superior energy storage performance in dielectric polymer films, it is crucial to balance three key properties: high constant, breakdown strength, and low loss. Here, we present the realization of ultrahigh efficiency density electrospun MBene/PEI composite achieved through an in-plane aligned doping pattern. The 1.0 wt% film exhibits a constant 10.7 at 1 kHz while maintaining loss below 0.0074. Compared random pattern, increases by 25.9%, suppressed 40.3%. uniform non-connected dispersion MBene fillers promotes homogeneous electric field distribution minimizes risk developing continuous leakage current paths. Therefore, strength remains 494 kV mm-1. Possessing minimal loss, well-preserved yields 8.03 J cm-3 room temperature, achieves 5.32 150 °C, with exceeding 90%. Additionally, this pattern also enhances mechanical properties. This work provides unique solution mitigate side effects utilizing conductive fillers, presenting valuable strategy fabricate films for high-performance storage.

Language: Английский

Citations

1
Research and Analysis on Enhancement of Surface Flashover Performance of Epoxy Resin Based on Dielectric Barrier Discharge Plasma Fluorination Modification DOI Creative Commons

Xizhe Chang,

Yueyi Sui,

Changyu Li

et al.

Nanomaterials, Journal Year: 2024, Volume and Issue: 14(17), P. 1382 - 1382

Published: Aug. 24, 2024

To conquer the challenges of charge accumulation and surface flashover in epoxy resin under direct current (DC) electric fields, numerous efforts have been made to research dielectric barrier discharge (DBD) plasma treatments using CF4/Ar as medium gas, which has proven effective improving voltage. However, despite being an efficient etching medium, SF6/Ar remained largely unexplored. In this work, we constructed a DBD device with gas explored influence processing times flow rates on morphology voltage resin. The observed by SEM indicates that degree intensifies time rate, quantitative characterization AFM maximum roughness 144 nm after 3 min treatment. Flashover test results show at 2 time, reached 19.02 kV/mm, is 25.49% higher than untreated sample previously reported works. addition effect roughness, trap distribution shows fluorinated groups help deepen energy levels density. optimal modification was achieved rate 3.5 slm coupled time. Furthermore, density functional theory (DFT) calculations reveal fluorination introduces additional electron traps (0.29 eV) hole (0.38 eV), enhancing capture carriers suppressing flashover.

Language: Английский

Citations

0