Achieving excellent thermally conductive and electromagnetic shielding performance by nondestructive functionalization and oriented arrangement of carbon nanotubes in composite films

Wang, Zhiguo; Yang, Yaqi; Zheng, Zongsheng; Lan, Ri-Tong; Dai, Kun; Xu, Ling; Huang, Hua‐Dong; Tang, Jianhua; Xu, Jia‐Zhuang; Li, Zhong‐Ming

doi:10.1016/j.compscitech.2020.108190

Cited by 63 publications

(29 citation statements)

References 35 publications

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“…This is mainly because phonon will scatter severely at the interfaces due to vibration harmonic mismatch, acoustic mismatch, and modulus mismatch during the heat transfer process, and the mean free path of phonon will decrease significantly [23], which is not conducive to the rapid and efficient improvement for λ of thermally conductive composite films [24]. Therefore, researchers have been struggling to explore suitable methods to effectively improve the interfaces between the polymer matrix and the thermally conductive fillers, so as to reduce the ITR and the phonon scattering at the interfaces [25][26][27]. Tseng et al [28] used glycidyl methacrylate (GMA) to graft-modify graphene oxide (g-GO) to prepare g-GO/PI thermally conductive composite films.…”

Section: Introductionmentioning

confidence: 99%

Significant Reduction of Interfacial Thermal Resistance and Phonon Scattering in Graphene/Polyimide Thermally Conductive Composite Films for Thermal Management

Ruan

Guo

et al. 2021

Research

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The developing flexible electronic equipment are greatly affected by the rapid accumulation of heat, which is urgent to be solved by thermally conductive polymer composite films. However, the interfacial thermal resistance (ITR) and the phonon scattering at the interfaces are the main bottlenecks limiting the rapid and efficient improvement of thermal conductivity coefficients (λ) of the polymer composite films. Moreover, few researches were focused on characterizing ITR and phonon scattering in thermally conductive polymer composite films. In this paper, graphene oxide (GO) was aminated (NH2-GO) and reduced (NH2-rGO), then NH2-rGO/polyimide (NH2-rGO/PI) thermally conductive composite films were fabricated. Raman spectroscopy was utilized to innovatively characterize phonon scattering and ITR at the interfaces in NH2-rGO/PI thermally conductive composite films, revealing the interfacial thermal conduction mechanism, proving that the amination optimized the interfaces between NH2-rGO and PI, reduced phonon scattering and ITR, and ultimately improved the interfacial thermal conduction. The in-plane λ (λ∥) and through-plane λ (λ⊥) of 15 wt% NH2-rGO/PI thermally conductive composite films at room temperature were, respectively, 7.13 W/mK and 0.74 W/mK, 8.2 times λ∥ (0.87 W/mK) and 3.5 times λ⊥ (0.21 W/mK) of pure PI film, also significantly higher than λ∥ (5.50 W/mK) and λ⊥ (0.62 W/mK) of 15 wt% rGO/PI thermally conductive composite films. Calculation based on the effective medium theory model proved that ITR was reduced via the amination of rGO. Infrared thermal imaging and finite element simulation showed that NH2-rGO/PI thermally conductive composite films obtained excellent heat dissipation and efficient thermal management capabilities on the light-emitting diodes bulbs, 5G high-power chips, and other electronic equipment, which are easy to generate heat severely.

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Section: Introductionmentioning

confidence: 99%

Significant Reduction of Interfacial Thermal Resistance and Phonon Scattering in Graphene/Polyimide Thermally Conductive Composite Films for Thermal Management

Ruan

Guo

et al. 2021

Research

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“…39 Compared with CNTs, CNTs-PDA also showed stretching vibration peaks of O-H/N-H bond (3437 cm À1 ) and aromatic ring (1640 cm À1 ). 37 In addition, the bending vibration peak from C-OH and stretching vibration peak from C O bond appeared at 1386 and 1071 cm À1 , respectively. 40 All these indicate that PDA has been successfully used to modify the surface of BN and CNTs.…”

Section: Testing and Characterizationmentioning

confidence: 98%

“…For example, He et al 36 used PDA to modify the surface of titanium carbide (TiC) particles, which effectively enhanced the interface interaction between TiC and thermoplastic polyurethane, and improved the dielectric and mechanical properties of the composite. Wang et al 37 used dopamine chemistry to modify the surface of CNTs, which effectively improved the interface interaction between CNTs and EVA matrix, and significantly improved the thermal conductivity and electromagnetic shielding properties of the composites. In addition, dopamine selfpolymerization is a room temperature reaction and does not involve harmful solvents, so it is a simple and green non-covalent bond modification method.…”

Section: Introductionmentioning

confidence: 99%

Preparation of high‐efficient ethylene‐vinyl acetate‐based thermal management materials by reducing interfacial thermal resistance with the assistance of polydopamine

Wang

Huang

2021

Polymers for Advanced Techs

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The rapid development of electronic technology puts forward higher requirements for thermal management materials. In this paper, polydopamine (PDA) was employed to improve the interfacial interaction between filler and matrix, and then to further regulate the interfacial thermal resistance and thermal conductivity of ethylene-vinyl acetate (EVA) composites. It was found that boron nitride (BN) sheets and carbon nanotubes (CNTs) can fully exert the synergistic heat conduction effect with the assistance of PDA, and construct continuous and efficient heat conduction channels in EVA matrix. When 30 vol% BN and 2 vol% CNTs were added, the in-plane thermal conductivity of the composite reached 9.61 WÁm À1 ÁK À1 , which was about 3225% higher than that of EVA matrix. The contribution of PDA to auxiliary enhanced thermal conductivity was further verified by the fitting and calculation of the interfacial thermal resistance of the composites. In addition, the EVA composite material had sensitive thermal response and stable electrical insulation properties, which ensured its thermal management applications in electronic equipment.

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“…PDA with abundant hydrophilic groups are widely used to improve the adhesion of various materials due to their strong hydrophilic groups. Wang et al reported that PDA decoration improved the interactions between adjacent CNTs, obtained intact CNT@PDA membranes in 2020 22 …”

Section: Introductionmentioning

confidence: 99%

“…Wang et al reported that PDA decoration improved the interactions between adjacent CNTs, obtained intact CNT@PDA membranes in 2020. 22 In order to overcome the challenges of insoluble PPy and low electrical conductivity, we prepared PPy/PDA/Ti 3 C 2 T x composites.…”

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confidence: 99%

Multifunctional MXene: Improve electromagnetic interference shielding of PPy/PDA/Ti₃C₂T_x composites in X‐ and K_u‐band

Cheng

Zhang

et al. 2022

Polymers for Advanced Techs

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With the development of technology, life is full of electromagnetic pollution; therefore we need to shield the electromagnetic signals that are undesirable and harmful to us. In this work, polypyrrole (PPy)/polydopamine (PDA)/Ti 3 C 2 T x composites were successfully prepared for electromagnetic interference shielding applications by a simple polymerization method and mixing process. We investigated the electrical conductivity, thermal properties, electromagnetic interference shielding effect (EMI SE), and its EMI attenuation mechanism of PPy/PDA/Ti 3 C 2 T x composites. By adjusting the content of Ti 3 C 2 T x in the PPy/PDA/Ti 3 C 2 T x composites (from 0 to 12 vol%), the conductivity of the composites increased considerably from 34.6 to 884.1 S m À1 , and the maximum EMI SE of the composites in K u -band varied accordingly from 4.30 to 21.82 dB. Additionally, the thermal stability of the PPy/PDA/ Ti 3 C 2 T x (12 vol%) composite was improved due to the addition of Ti 3 C 2 T x and PDA, with a change in mass loss from 59.25% to 29.34% at 900 C. These results highlight that the investigated PPy/PDA/Ti 3 C 2 T x composites are promising materials for EMI shielding.

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Achieving excellent thermally conductive and electromagnetic shielding performance by nondestructive functionalization and oriented arrangement of carbon nanotubes in composite films

Cited by 63 publications

References 35 publications

Significant Reduction of Interfacial Thermal Resistance and Phonon Scattering in Graphene/Polyimide Thermally Conductive Composite Films for Thermal Management

Significant Reduction of Interfacial Thermal Resistance and Phonon Scattering in Graphene/Polyimide Thermally Conductive Composite Films for Thermal Management

Preparation of high‐efficient ethylene‐vinyl acetate‐based thermal management materials by reducing interfacial thermal resistance with the assistance of polydopamine

Multifunctional MXene: Improve electromagnetic interference shielding of PPy/PDA/Ti₃C₂T_x composites in X‐ and K_u‐band

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Achieving excellent thermally conductive and electromagnetic shielding performance by nondestructive functionalization and oriented arrangement of carbon nanotubes in composite films

Cited by 63 publications

References 35 publications

Significant Reduction of Interfacial Thermal Resistance and Phonon Scattering in Graphene/Polyimide Thermally Conductive Composite Films for Thermal Management

Significant Reduction of Interfacial Thermal Resistance and Phonon Scattering in Graphene/Polyimide Thermally Conductive Composite Films for Thermal Management

Preparation of high‐efficient ethylene‐vinyl acetate‐based thermal management materials by reducing interfacial thermal resistance with the assistance of polydopamine

Multifunctional MXene: Improve electromagnetic interference shielding of PPy/PDA/Ti3C2Tx composites in X‐ and Ku‐band

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Multifunctional MXene: Improve electromagnetic interference shielding of PPy/PDA/Ti₃C₂T_x composites in X‐ and K_u‐band