Enhanced thermally conductive and thermomechanical properties of polymethyl methacrylate (PMMA)/graphene nanoplatelets (GNPs) nanocomposites for radiator of electronic components

Yang, Piaoping; Yang, Bin; Jia, Ning; Yu, Yangnan; Xu, Xiang; Wang, Yingying; Wu, Bin; Qian, Jiasheng; Xia, Ru; Wang, Chenjun; Sun, Aiqing; Shi, You

doi:10.1016/j.polymertesting.2021.107237

Cited by 18 publications

(13 citation statements)

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“…The parameter C gradually decreased, reflecting that the thermal conductivities of the composites increased gradually as well, which was in good consistence with the experimental results. The parameter D in the present case increased remarkably with the increase in the Ni@GNP content, which indicated that the internal network structure of the material gradually formed …”

Section: Resultsmentioning

confidence: 50%

“…The parameter D in the present case increased remarkably with the increase in the Ni@GNP content, which indicated that the internal network structure of the material gradually formed. 38 In order to accurately assess the thermal conductivity of PMMA/Ni@GNP composites and reveal the correlation between the material structure and thermal conductivity, a laser flash method was utilized to measure both out-of-plane and in-plane thermal diffusion coefficients (α) and to acquire the thermal conductivities of the testing samples. The thermal conductivity (λ) of the composites could readily be calculated using eq 6…”

Section: Resultsmentioning

confidence: 99%

“…In order to clearly reveal the relationship between the internal structure characteristics and thermal conduction property of PMMA/Ni@GNP composites, a non-linear fitting method was used to analyze the ITI experimental data. Here, the dimensionless temperature (θ) of the warming process is defined as where T , T 0 , and T w are the instantaneous temperature, initial temperature, and end temperature of the sample, respectively.…”

Section: Resultsmentioning

confidence: 99%

“…Dimensionless time (τ) is defined as where b indicates the reference length that is half the thickness of the samples and α is the material’s thermal diffusion coefficient.…”

Section: Resultsmentioning

confidence: 99%

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Enhanced Thermally Conductive and Microwave Absorbing Properties of Polymethyl Methacrylate/Ni@GNP Nanocomposites

Yang

Jia

et al. 2021

Ind. Eng. Chem. Res.

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In this work, Ni@GNP nanohybrids fabricated via an in situ reduction method were incorporated into polymethyl methacrylate (PMMA) to prepare PMMA/Ni@GNP nanocomposites via solution blending and hot-pressing. The Ni nanoparticles with an average diameter of 70–80 nm were observed to successfully grow on the GNP surface via SEM and TEM. Both thermally conductive and microwave absorbing properties of the prepared composites were intensively investigated. A reflection loss test experimentally suggested that the PMMA/Ni@GNP composites showed a good microwave absorbing property, among which the composite containing 30 wt % Ni@GNP displayed the best microwave absorption performance (with a value of −30 dB for RL min in the C band). The thermal conduction behavior of the composites was jointly studied by infrared thermal imaging (ITI) and enthalpy transformation method together with a four-parameter model. The average heating rate during an initial stage was obviously found to increase from 65.4 to 103.2 °C/min, indicating that a well-defined heat conduction network gradually formed in the composites, which exerted positive influence on heat conduction. The composites generally bore perfect thermal conductivities (e.g., with a maximum in-plane thermal conductivity of 9.02 W/m·K and a maximum out-of-plane value of 1.29 W/m·K), and the variations of thermal conductivity versus filler loading should be attributed to the construction of an anisotropically thermally conductive network in the composites. The PMMA/Ni@GNP composites with desirable microwave absorption and thermal conductivity would find potential applications in 5G communication devices.

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Section: Resultsmentioning

confidence: 50%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

“…Dimensionless time (τ) is defined as where b indicates the reference length that is half the thickness of the samples and α is the material’s thermal diffusion coefficient.…”

Section: Resultsmentioning

confidence: 99%

See 2 more Smart Citations

Enhanced Thermally Conductive and Microwave Absorbing Properties of Polymethyl Methacrylate/Ni@GNP Nanocomposites

Yang

Jia

et al. 2021

Ind. Eng. Chem. Res.

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“…This behavior can be ascribed to a reduced mobility of the polymer chains at the interface between the filler and the matrix [122,123]. Therefore, the constraint applied on the chains can directly induce an increase in glass transition temperature [124,125].…”

Section: Graphene/polymer Nanocomposites: Fabrication and Propertiesmentioning

confidence: 99%

Recent Trends in Graphene/Polymer Nanocomposites for Sensing Devices: Synthesis and Applications in Environmental and Human Health Monitoring

Toto

Laurenzi

2022

Polymers

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Graphene-based nanocomposites are largely explored for the development of sensing devices due to the excellent electrical and mechanical properties of graphene. These properties, in addition to its large specific surface area, make graphene attractive for a wide range of chemical functionalization and immobilization of (bio)molecules. Several techniques based on both top-down and bottom-up approaches are available for the fabrication of graphene fillers in pristine and functionalized forms. These fillers can be further modified to enhance their integration with polymeric matrices and substrates and to tailor the sensing efficiency of the overall nanocomposite material. In this review article, we summarize recent trends in the design and fabrication of graphene/polymer nanocomposites (GPNs) with sensing properties that can be successfully applied in environmental and human health monitoring. Functional GPNs with sensing ability towards gas molecules, humidity, and ultraviolet radiation can be generated using graphene nanosheets decorated with metallic or metal oxide nanoparticles. These nanocomposites were shown to be effective in the detection of ammonia, benzene/toluene gases, and water vapor in the environment. In addition, biological analytes with broad implications for human health, such as nucleic bases or viral genes, can also be detected using sensitive, graphene-based polymer nanocomposites. Here, the role of the biomolecules that are immobilized on the graphene nanomaterial as target for sensing is reviewed.

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A Facile Way of Enhancing Thermally and Electrically Conductive Properties of Epoxy/Ni/GNP Composites via Construction of a Hybrid Filler Network with a Magnetic Field Orientation Technique

Yang

Jia

Wang

et al. 2022

Macro Materials & Eng

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In this work, epoxy (EP) resin composites with “point‐surface” heterostructures constructed by hybrid fillers of Ni particles and graphene nanosheets (GNPs) are prepared via a blending method under magnetic field. Effects of filler content and magnetic orientation on dielectric, thermally and electrically conductive, and thermomechanical properties of the resultant composites are investigated. The findings disclose that the synergistic effect of hybrid fillers and the magnetic orientation result in the formation of a complex heterogeneous network structure, significantly improving both thermal and electrical conductivities. From the temperature distribution analysis, it is the construction of the heterogeneous network that improves the thermally conductive and thermomechanical properties. Sample Y4 (containing 28 wt% Ni and 2 wt% GNP) displays an average heating rate (AHR) of 152.4 °C min−1 and has an out‐of‐plane thermal conductivity of 0.930 W m−1 K−1 (267.6% higher than that of neat EP). The infrared thermal imaging (ITI) together with SEM observations further confirms that the Ni chains in situ formed under a magnetic field are responsible for the improved composite's thermal conductivity and thermal management capability, which make it potentially applicable for 3D packaging materials in power‐intensive electronic components.

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Enhanced thermally conductive and thermomechanical properties of polymethyl methacrylate (PMMA)/graphene nanoplatelets (GNPs) nanocomposites for radiator of electronic components

Cited by 18 publications

References 50 publications

Enhanced Thermally Conductive and Microwave Absorbing Properties of Polymethyl Methacrylate/Ni@GNP Nanocomposites

Enhanced Thermally Conductive and Microwave Absorbing Properties of Polymethyl Methacrylate/Ni@GNP Nanocomposites

Recent Trends in Graphene/Polymer Nanocomposites for Sensing Devices: Synthesis and Applications in Environmental and Human Health Monitoring

A Facile Way of Enhancing Thermally and Electrically Conductive Properties of Epoxy/Ni/GNP Composites via Construction of a Hybrid Filler Network with a Magnetic Field Orientation Technique

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