Thermal Interface Materials with High Thermal Conductivity and Low Young’s Modulus Using a Solid–Liquid Metal Codoping Strategy DOI
Xudong Zhang,

Zi-Tong Zhang,

Hongzhang Wang

et al.

ACS Applied Materials & Interfaces, Journal Year: 2023, Volume and Issue: 15(2), P. 3534 - 3542

Published: Jan. 5, 2023

Thermal interface materials (TIMs), as typical thermal functional materials, are highly required to possess both high conductivity and low Young's modulus. However, the naturally synchronized change in mechanical properties seriously hinders development of high-performance TIMs. To tackle such a dilemma, strategy codoping solid fillers liquid metal into polymer substrates is proposed this study. This includes large amount metals that play role paths small uniformly dispersed further enhance heat conduction. Through synergistic effect fillers, can be improved, modulus kept simultaneously. A TIM with volume 55% gallium-based 15% copper particles has 3.94 W/(m·K) 699 kPa, which had maximum thermomechanical performance coefficient compared TIMs filler-doped In addition, solid-liquid codoped increased sharply an increase content, rapidly ratio polymer. The high-low-temperature cycling test large-size light-emitting diode (LED) application demonstrated stable physical performance. provides broad space solve classic tradeoff issue composites.

Language: Английский

Heterostructured BN@Co‐C@C Endowing Polyester Composites Excellent Thermal Conductivity and Microwave Absorption at C Band DOI

Xiao Zhong,

Mukun He, Chenyang Zhang

et al.

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 34(19)

Published: Jan. 9, 2024

Abstract The trends of miniaturization, lightweight, and high integration in electronics have brought serious issues heat dissipation electromagnetic compatibility also limited the simultaneous use thermally conductive microwave absorption materials. Therefore, it is imperative to design materials that possess those dual functions. In this work, one‐pot method used anchor zeolitic imidazolate framework ZIF‐67 coated with polydopamine (PDA) on boron nitride (BN) obtain BN@ZIF‐67@PDA. pyrolysis product BN@Co‐C@C as heterostructured conductive/microwave fillers blended polyethylene terephthalate (PET) prepare BN@Co‐C@C/PET composites. When mass ratio BN ZIF‐67@PDA 7.5:1 fraction 7.5 @Co‐C@C 45 wt%, @Co‐C@C/PET composites exhibit excellent thermal conductivities performances. conductivity coefficient 5.37 W m −1 K , which 35.8 times higher than PET (0.15 ), wt% (BN /Co‐C@C)/PET (4.03 ) prepared by directly mixing. minimum reflection loss are −63.1 dB at 4.72 GHz, corresponding effective bandwidth 1.28 GHz (4.08–5.36 GHz), achieving performance C band.

Language: Английский

Citations

354

Advances and mechanisms in polymer composites toward thermal conduction and electromagnetic wave absorption DOI
Yongqiang Guo, Kunpeng Ruan, Guang‐Sheng Wang

et al.

Science Bulletin, Journal Year: 2023, Volume and Issue: 68(11), P. 1195 - 1212

Published: May 2, 2023

Language: Английский

Citations

319

Staggered circular nanoporous graphene converts electromagnetic waves into electricity DOI Creative Commons
Hualiang Lv, Yuxing Yao, Shucong Li

et al.

Nature Communications, Journal Year: 2023, Volume and Issue: 14(1)

Published: April 8, 2023

Harvesting largely ignored and wasted electromagnetic (EM) energy released by electronic devices converting it into direct current (DC) electricity is an attractive strategy not only to reduce EM pollution but also address the ever-increasing crisis. Here we report synthesis of nanoparticle-templated graphene with monodisperse staggered circular nanopores enabling EM-heat-DC conversion pathway. We experimentally theoretically demonstrate that this nanoporous structure alters graphene's phononic properties synergistically manipulating its intralayer nanostructures interlayer interactions. The exhibits anomalous combination properties, which lead efficient absorption waves heat in turn output DC through thermoelectric effect. Overall, our results advance fundamental understanding structure-property relationships ordered graphene, providing effective generate electric energy.

Language: Английский

Citations

202

Excellent Low‐Frequency Microwave Absorption and High Thermal Conductivity in Polydimethylsiloxane Composites Endowed by Hydrangea‐Like CoNi@BN Heterostructure Fillers DOI Open Access
Mukun He,

Xiao Zhong,

Xinghan Lu

et al.

Advanced Materials, Journal Year: 2024, Volume and Issue: 36(48)

Published: Oct. 9, 2024

Abstract The advancement of thin, lightweight, and high‐power electronic devices has increasingly exacerbated issues related to electromagnetic interference heat accumulation. To address these challenges, a spray‐drying‐sintering process is employed assemble chain‐like CoNi flake boron nitride (BN) into hydrangea‐like CoNi@BN heterostructure fillers. These fillers are then composited with polydimethylsiloxane (PDMS) develop CoNi@BN/PDMS composites, which integrate low‐frequency microwave absorption thermal conductivity. When the volume fraction 44 vol% mass ratio BN 3:1, composites exhibit optimal performance in both achieve minimum reflection loss −49.9 dB effective bandwidth 2.40 GHz (3.92–6.32 GHz) at thickness 4.4 mm, fully covering n79 band (4.4–5.0 for 5G communications. Meanwhile, in‐plane conductivity ( λ ∥ ) 7.31 W m −1 K , ≈11.4 times (0.64 pure PDMS, 32% higher than that (CoNi/BN)/PDMS (5.52 same obtained through direct mixing.

Language: Английский

Citations

170

Thermally conductive polyvinyl alcohol composite films via introducing hetero-structured MXene@silver fillers DOI

Mukun Li,

Yuyao Sun,

Dianying Feng

et al.

Nano Research, Journal Year: 2023, Volume and Issue: 16(5), P. 7820 - 7828

Published: March 15, 2023

Language: Английский

Citations

168

Wearable Janus‐Type Film with Integrated All‐Season Active/Passive Thermal Management, Thermal Camouflage, and Ultra‐High Electromagnetic Shielding Efficiency Tunable by Origami Process DOI
Xiaolong Li, Xinxin Sheng, Yu Fang

et al.

Advanced Functional Materials, Journal Year: 2023, Volume and Issue: 33(18)

Published: Feb. 8, 2023

Abstract Multifunctional films with integrated temperature adjustment, electromagnetic interference (EMI) shielding, and thermal camouflage are remarkably desirable for wearable products. Herein, a novel Janus‐type multifunctional ultra‐flexible film is fabricated via continuous electrospinning followed by spraying. Interestingly, in the polyvinyl alcohol (PVA)/phase change capsules (PCC) layer (P 1 ), PCC strung on PVA fibers to form stable “candied haws stick” structure that obviates slipping or falling off. The sufficient melting enthalpy (141.4 J g −1 ) guarantees its thermoregulation capability. Simultaneously, high mid‐IR emissivity (90.15%) endows radiative cooling properties (reducing 10.13 °C). Mechanical strength significantly improved superimposing polylactic acid (PLA) 2 surface. By spraying thin MXene PLA surface of P film, obtained (MXene/P MP endowed satisfactory low‐voltage heating, photo‐thermal superior performance, achieving all‐season comfort. Impressively, flexible achieves enhanced EMI shielding effect from 50.3 87.8 dB through simple origami process, which simplifies manufacturing process high‐performance materials. In brief, an attractive candidate future products personalized management anti‐electromagnetic radiation.

Language: Английский

Citations

151

Electric‐Field‐Induced Alignment of Functionalized Carbon Nanotubes Inside Thermally Conductive Liquid Crystalline Polyimide Composite Films DOI
Kunpeng Ruan, Xuetao Shi, Yali Zhang

et al.

Angewandte Chemie International Edition, Journal Year: 2023, Volume and Issue: 62(38)

Published: Aug. 7, 2023

The positive liquid crystals, 4'-heptyl-4-biphenylcarbonitrile (7CB), are used to functionalize carbon nanotubes (LC-CNT), which can be aligned in the crystalline polyimide (LC-PI) matrix under an alternating electric field fabricate thermally conductive LC-CNT/LC-PI composite films. efficient establishment of thermal conduction pathways films with a low amount LC-CNT is achieved through oriented alignment within LC-PI matrix. When mass fraction 15 wt %, in-plane conductivity coefficient (λ∥ ) and through-plane (λ⊥ reach 4.02 W/(m ⋅ K) 0.55 W/(m⋅K), 90.5 % 71.9 higher than those intrinsically respectively, also 28.8 5.8 CNT/LC-PI respectively. Meanwhile, possess excellent mechanical heat resistance properties. Young's modulus index 2.3 GPa 297.7 °C, same CNT.

Language: Английский

Citations

151

Construction of Self-Assembly Based Tunable Absorber: Lightweight, Hydrophobic and Self-Cleaning Properties DOI Creative Commons

Zehua Zhou,

Qianqian Zhu, Yue Liu

et al.

Nano-Micro Letters, Journal Year: 2023, Volume and Issue: 15(1)

Published: May 28, 2023

Although multifunctional aerogels are expected to be used in applications such as portable electronic devices, it is still a great challenge confer multifunctionality while maintaining their inherent microstructure. Herein, simple method proposed prepare NiCo/C with excellent electromagnetic wave absorption properties, superhydrophobicity, and self-cleaning by water-induced NiCo-MOF self-assembly. Specifically, the impedance matching of three-dimensional (3D) structure interfacial polarization provided CoNi/C well defect-induced dipole primary contributors broadband absorption. As result, prepared have width 6.22 GHz at 1.9 mm. Due presence hydrophobic functional groups, improve stability humid environments obtain hydrophobicity large contact angles > 140°. This aerogel has promising absorption, resistance water or environments.

Language: Английский

Citations

146

Hexagonal boron nitride nanosheets: Preparation, heat transport property and application as thermally conductive fillers DOI
Lulu An, Yuanlie Yu, Qiran Cai

et al.

Progress in Materials Science, Journal Year: 2023, Volume and Issue: 138, P. 101154 - 101154

Published: June 15, 2023

Language: Английский

Citations

132

Highly Thermally Conductive Aramid Nanofiber Composite Films with Synchronous Visible/Infrared Camouflages and Information Encryption DOI

Yixin Han,

Kunpeng Ruan,

Xiaoyu He

et al.

Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: 63(17)

Published: Feb. 9, 2024

The development of highly thermally conductive composites that combine visible light/infrared camouflage and information encryption has been endowed with great significance in facilitating the application 5G communication technology military fields. This work uses aramid nanofibers (ANF) as matrix, hetero-structured silver nanowires@boron nitride nanosheets (AgNWs@BNNS) prepared by situ growth fillers, which are combined to fabricate sandwich structured electrically insulating (BNNS/ANF)-(AgNWs@BNNS)-(BNNS/ANF) (denoted BAB) composite films "filtration self-assembly, air spraying, hot-pressing" method. When mass ratio AgNWs@BNNS BNNS is 1 : total fraction 50 wt %, BAB film maximum in-plane thermal conductivity coefficient (λ

Language: Английский

Citations

131