An Engineered Heterostructured Trinity Enables Fire-Safe, Thermally Conductive Polymer Nanocomposite Films with Low Dielectric Loss DOI Creative Commons
Qiang Chen,

Jiabing Feng,

Yijiao Xue

et al.

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

Published: Feb. 26, 2025

Abstract To adapt to the trend of increasing miniaturization and high integration microelectronic equipments, there is a demand for multifunctional thermally conductive (TC) polymeric films combining excellent flame retardancy low dielectric constant ( ε ). date, have been few successes that achieve such performance portfolio in polymer due their different even mutually exclusive governing mechanisms. Herein, we propose trinity strategy creating rationally engineered heterostructure nanoadditive (FG@CuP@ZTC) by situ self-assembly immobilization copper-phenyl phosphonate (CuP) zinc-3, 5-diamino-1,2,4-triazole complex (ZTC) onto fluorinated graphene (FG) surface. Benefiting from synergistic effects FG, CuP, ZTC bionic lay-by-lay (LBL) strategy, as-fabricated waterborne polyurethane (WPU) nanocomposite film with 30 wt% FG@CuP@ZTC exhibits 55.6% improvement limiting oxygen index (LOI), 66.0% 40.5% reductions peak heat release rate total release, respectively, 93.3% increase tensile strength relative pure WPU between ZTC. Moreover, presents thermal conductivity λ ) 12.7 W m −1 K 2.92 at 10 6 Hz. This work provides commercially viable rational design develop high-performance films, which hold great potential as advanced dissipators high-power-density microelectronics.

Language: Английский

MOFs-Derived Strategy and Ternary Alloys Regulation in Flower-Like Magnetic-Carbon Microspheres with Broadband Electromagnetic Wave Absorption DOI Creative Commons
Mengqiu Huang,

Bangxin Li,

Yuetong Qian

et al.

Nano-Micro Letters, Journal Year: 2024, Volume and Issue: 16(1)

Published: July 12, 2024

Abstract Broadband electromagnetic (EM) wave absorption materials play an important role in military stealth and health protection. Herein, metal–organic frameworks (MOFs)-derived magnetic-carbon CoNiM@C (M = Cu, Zn, Fe, Mn) microspheres are fabricated, which exhibit flower-like nano–microstructure with tunable EM response capacity. Based on the MOFs-derived CoNi@C microsphere, adjacent third element is introduced into magnetic CoNi alloy to enhance performance. In term of broadband absorption, order efficient bandwidth (EAB) value Mn > Fe Zn Cu microspheres. Therefore, CoNiMn@C hold outstanding EAB can reach up 5.8 GHz (covering 12.2–18 at 2.0 mm thickness). Besides, off-axis electron holography computational simulations applied elucidate inherent dielectric dissipation loss. Rich heterointerfaces promote aggregation negative/positive charges contacting region, forming interfacial polarization. The graphitized carbon layer catalyzed by CoNiMn core offered mobility path, boosting conductive Equally importantly, coupling observed strengthen responding behaviors. This study provides a new guide build regulating ternary alloy.

Language: Английский

Citations

24
Hierarchical multi-interface Co1-xS/Co9S8@C hollow microsphere for enhancing dielectric polarization as an efficient microwave absorber DOI
Yikun Chen,

Huichao Rao,

Boyang Wang

et al.

Carbon, Journal Year: 2024, Volume and Issue: 229, P. 119475 - 119475

Published: July 22, 2024

Language: Английский

Citations

24
Manipulating polarization attenuation in NbS2–NiS2 nanoflowers through homogeneous heterophase interface engineering toward microwave absorption with shifted frequency bands DOI Creative Commons

Yiru Fu,

Yuping Wang,

Junye Cheng

et al.

Nano Materials Science, Journal Year: 2024, Volume and Issue: unknown

Published: July 1, 2024

Homogeneous heterogeneous (heterophase) interfaces regulated with low energy barriers have a fast response to applied electric fields and could provide unique interfacial polarization, which facilitate the transport of electrons across substrate. Such regulation on is effective in modulating electromagnetic wave absorbing materials. Herein, we construct NbS2–NiS2 heterostructures NiS2 nanoparticles uniformly grown NbS2 hollow nanospheres, such particular structure enhances polarization. The strong electron transfer at interface promotes throughout material, results less scattering, conduct ion loss dielectric polarization relaxation, improves loss, good impedance matching material. Consequently, band may be successful tuned. By regulating amount NiS2, finely alternated so that overall wave-absorbing performance shifted lower frequencies. With content 15 ​wt% an absorber thickness 1.84 ​mm, minimum reflection 14.56 ​GHz −53.1 ​dB, absorption bandwidth 5.04 ​GHz; more importantly, different bands −20 dB, microwave rate reaches 99% when about 1.5–4.5 ​mm. This work demonstrates construction homogeneous improving properties, providing guideline for synthesis highly efficient

Language: Английский

Citations

21
Advantageous synergistic strategy to construct Ni@C/PC composites for efficient electromagnetic wave absorption DOI

Zhiqiang Guo,

Xiaoyi Zhang, Changpeng Lv

et al.

Carbon, Journal Year: 2025, Volume and Issue: unknown, P. 120010 - 120010

Published: Jan. 1, 2025

Language: Английский

Citations

19
Highly Thermally Conductive Liquid Crystalline Epoxy Resin Vitrimers with Reconfigurable, Shape‐Memory, Photo‐Thermal, and Closed‐Loop Recycling Performance DOI Creative Commons
Fengyuan Zhang, Junliang Zhang, Kuan Zhang

et al.

Advanced Science, Journal Year: 2024, Volume and Issue: unknown

Published: Nov. 22, 2024

Abstract The low thermal conductivity, poor toughness, and non‐reprocessability of thermosetting epoxy resins severely restrict their applications sustainable development in flexible electronics. Herein, liquid crystalline (LCE) dynamic ester disulfide bonds are introduced into the cured network bisphenol A resin (E‐51) to construct highly thermally conductive (LCER) vitrimers. LCER vitrimers demonstrate adjustable mechanical properties by varying ratio LCE E‐51, allowing it transition from soft strong. Typically, a 75 mol% 25 E‐51 results an in‐plane conductivity ( λ ) 1.27 W m −1 K , over double that pure vitrimer (0.61 ). tensile strength toughness increase 2.88 folds 14.1 MPa 2.45 20.1 MJ −3 respectively. Besides, phase covalent enable triple shape memory three‐dimensional reconstruction. After four reprocessing cycles, remain at 94% 72%, Integrating carbon nanotubes (CNTs) imparts photo‐thermal effect enables “on” “off” switch under near‐infrared light vitrimer. Furthermore, CNTs/LCER displays light‐induced actuation, self‐repairing, self‐welding besides closed‐loop recycling rapid degradation performance.

Language: Английский

Citations

16
Triple-network structured phase change composite based on “rod-brush” CNTs-CFs with high thermal conductivity DOI

Xiaoling He,

Wenjian Zhang,

Yuanjun Yang

et al.

Composites Science and Technology, Journal Year: 2025, Volume and Issue: unknown, P. 111080 - 111080

Published: Jan. 1, 2025

Language: Английский

Citations

15
Synergistic Polarization Relaxation in Heteroatom‐Optimized Heterointerfaces for Electromagnetic Wave Absorption DOI Open Access
Shuang Xu, Zirui Jia, Di Lan

et al.

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

Published: Feb. 24, 2025

Abstract The regulation of heteroatoms and heterogeneous interface characteristics has emerged as a promising strategy to enhance electromagnetic wave (EMW) absorption. However, challenges remain in precisely controlling heteroatom doping fully understanding the synergistic mechanisms between interfaces. Here, novel is proposed for enhancing polarization relaxation through optimization. Carbon nanofiber (CNF)‐based Ni–Fe nanocubes decorated with N O are synthesized by pyrolyzing Fe‐based metal–organic frameworks under different atmospheres (NH 3 , H 2 /Ar, Ar). results show that N, play crucial role effect regulating electronic structure diverse structures. Finally, Fe N@Ni Fe/CNFs exhibit excellent EMW absorption at 2.3 mm, minimum reflection loss −56.75 dB, an effective bandwidth 6.7 GHz. Additionally, these materials display remarkable corrosion resistance due their unique fiber network structure. This study highlights optimizing effects, offering valuable insights design advanced heteroatom‐optimized heterointerfaces.

Language: Английский

Citations

15
Synergistic Enhancement of Defect-Induced Polarization and Built-In Electric Field Effect in Carbon Hybrids towards Efficient Electromagnetic Wave Absorption DOI
Shijie Zhang, Jiajun Zheng, Changpeng Lv

et al.

Carbon, Journal Year: 2025, Volume and Issue: unknown, P. 120037 - 120037

Published: Jan. 1, 2025

Language: Английский

Citations

14
Highly Thermally Conductive and Flame-Retardant Waterborne Polyurethane Composites with 3D BNNS Bridging Structures via Magnetic Field Assistance DOI Creative Commons
Hao Jiang,

Yuhui Xie,

Mukun He

et al.

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

Published: Feb. 7, 2025

Abstract The microstructure design for thermal conduction pathways in polymeric electrical encapsulation materials is essential to meet the stringent requirements efficient management and runaway safety modern electronic devices. Hence, a composite with three-dimensional network (Ho/U-BNNS/WPU) developed by simultaneously incorporating magnetically modified boron nitride nanosheets (M@BNNS) non-magnetic organo-grafted BNNS (U-BNNS) into waterborne polyurethane (WPU) synchronous molding under horizontal magnetic field. results indicate that continuous in-plane formed M@BNNS aligned along field direction, combined bridging structure established U-BNNS, enable Ho/U-BNNS/WPU exhibit exceptional ( λ // ) through-plane conductivities ⊥ ). In particular, addition of 30 wt% 5 composites reach 11.47 2.88 W m −1 K , respectively, which representing 194.2% improvement compared single orientation M@BNNS. Meanwhile, exhibits distinguished capabilities as interface LED chips. also demonstrate excellent flame retardancy, peak heat release total reduced 58.9% 36.9%, WPU. Thus, this work offers new insights thermally conductive structural flame-retardant systems polymer composites, presenting broad application potential packaging fields.

Language: Английский

Citations

5
Yolk–Shell CoNi@N-Doped Carbon-CoNi@CNTs for Enhanced Microwave Absorption, Photothermal, Anti-Corrosion, and Antimicrobial Properties DOI Creative Commons

Qiqin Liang,

Mukun He,

Beibei Zhan

et al.

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

Published: Feb. 26, 2025

Abstract The previous studies mainly focused on improving microwave absorbing (MA) performances of MA materials. Even so, these designed materials were very difficult to be employed in complex and changing environments owing their single-functionalities. Herein, a combined Prussian blue analogues derived catalytical chemical vapor deposition strategy was proposed produce hierarchical cubic sea urchin-like yolk–shell CoNi@N-doped carbon (NC)-CoNi@carbon nanotubes (CNTs) mixed-dimensional multicomponent nanocomposites (MCNCs), which composed zero-dimensional CoNi nanoparticles, three-dimensional NC nanocubes one-dimensional CNTs. Because good impedance matching attenuation characteristics, the CoNi@NC-CoNi@CNTs MCNCs exhibited excellent performances, achieved minimum reflection loss ( RL min ) −71.70 dB at 2.78 mm Radar Cross section value −53.23 m 2 . More importantly, acquired results demonstrated that presented photothermal, antimicrobial anti-corrosion properties structure, highlighting potential multifunctional applications. It could seen this finding not only generalizable route magnetic NC-CNTs-based MCNCs, but also provided an effective develop improve environmental adaptabilities.

Language: Английский

Citations

5