Spherical boron nitride/pitch‐based carbon fiber/silicone rubber composites for high thermal conductivity and excellent electromagnetic interference shielding performance

Xie, Jian; Li, Chenjian; Fu, Yuheng; Chen, Zhimin; Wang, Xuelin; Qin, Hongmei; Zhang, Xiaolin; Zhang, Shixian; Wang, Shan; Xiong, Chuanxi; Zhu, Sijia

doi:10.1002/app.52734

Cited by 13 publications

(4 citation statements)

References 46 publications

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“…Therefore, under the experimental conditions of a single carbon fiber-filled silicone rubber, the carbon fiber conductive silicone rubber with a mass ratio of 5.5-7.5 wt% has better mechanical properties. The tensile strength of spherical boron nitride 10/pitch-based carbon fiber 20/silicone rubber (s-BN10/PCF20/SR) prepared by reference [23] is 1.08 MPa, which is obviously lower than the tensile strength of 7.5 wt% carbon fiber conductive silicone rubber prepared in this paper (2.12 MPa), which indicates that the carbon fiber conductive silicone rubber prepared in this paper has good mechanical properties.…”

Section: (B) Mechanical Properties Of the Cf Conductive Silicone Rubbermentioning

confidence: 59%

Preparation Methods and Properties of CNT/CF/G Carbon-Based Nano-Conductive Silicone Rubber

Mei,

Wang,

Wan

et al. 2023

Applied Sciences

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Carbon−based nano−conductive silicone rubber is a kind of composite conductive polymer material that has good electrical and thermal conductivities and high magnetic flux. It has good application prospects for replacing most traditional conductive materials, but its mechanical and tensile strengths are poor, which limit its applications. In this study, carbon fiber (CF), graphene (G) and carbon nanotubes (CNT) are used as fillers to prepare carbon−based nano−conductive silicone rubber via solution blending, and the preparation methods and properties are analyzed. The results show that when the carbon fiber content is 7.5 wt%, the volume resistivity of carbon fiber conductive silicone rubber is 9.5 × 104 Ω·cm, the surface resistance is 2.88 × 105 Ω, and the tensile strength reaches 2.12 Mpa. When the graphene content is 5.5wt%, the volume resistivity of graphene conductive silicone rubber is 8.7 × 104 Ω·cm, and the surface resistance is 2.4 × 106 Ω. When the carbon nanotube content is 1.25 wt%, the volume resistivity of carbon nanotube conductive silicone rubber is 1.34 × 104 Ω·cm, and the surface resistance is 1.0 × 106 Ω. The three conductive nano−fillers in the blended carbon nano−conductive silicone rubber form a stable three−dimensional composite conductive network, which enhances the conductivity and stability. When the tensile rate is 520%, the resistance of the blended rubber increases from 2.69 × 103 to 9.66 × 104 Ω, and the rubber maintains good resilience and tensile sensitivity under repeated stretching. The results show that the proposed blended carbon nano−conductive silicone rubber has good properties and great application prospects, verifying the employed research method and showing the credibility of the research results.

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Section: (B) Mechanical Properties Of the Cf Conductive Silicone Rubbermentioning

confidence: 59%

Preparation Methods and Properties of CNT/CF/G Carbon-Based Nano-Conductive Silicone Rubber

Mei,

Wang,

Wan

et al. 2023

Applied Sciences

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“…The thermal treatment makes some of the amorphous carbon fully crystallized and induces all of the carbon crystals to grow, which is ultimately shown as a significant increase in thermal conductivity. Figure j demonstrates the thermal conductivity of our work compared to other composites using CF-based fillers in previous works, − and more detailed data are shown in Table S3.…”

Section: Resultsmentioning

confidence: 99%

In Situ Construction of High-Thermal-Conductivity and Negative-Permittivity Epoxy/Carbon Fiber@Carbon Composites with a 3D Network by High-Temperature Chemical Vapor Deposition

Jiang,

Xu,

Wang

et al. 2023

ACS Appl. Mater. Interfaces

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Modern highly integrated microelectronic devices are unable to dissipate heat over time, which greatly affects the operating efficiency and service life of electronic equipment. Constructing high-thermal-conductivity composites with 3D network structures is a hot research topic. In this article, carbon fiber felt (CFF) was prepared by airflow netting forming technology and needle punching combined with stepped heat treatment. Then, carbon-coated carbon fiber felt (C@CFF) with a three-dimensional network structure was constructed in situ by high-temperature chemical vapor deposition (CVD). Finally, high-temperature treatment was used to improve the degree of crystallinity of C@CFF and further enhance its graphitization. The epoxy (EP) composites were prepared by simple vacuum infiltration–molding curing. The test results showed that the in-plane thermal conductivity (K ∥) and through-plane thermal conductivity (K ⊥) of EP/C@CFF-2300 °C could reach up to 13.08 and 2.78 W/mK, respectively, where the deposited carbon content was 11.76 vol %. The in-plane thermal conductivity enhancement (TCE) of EP/C@CFF-2300 °C was improved by 6440 and 808% compared to those of pure EP and EP/CFF, respectively. The high-temperature treatment greatly provides an improvement in thermal conductivity for the in-plane and the through-plane. Infrared imaging showed excellent thermal management properties of the prepared epoxy composites. EP/C@CFF-2300 °C owned an in-plane AC conductivity of up to 0.035 S/cm at 10 kHz, and Lorentz–Drude-type negative permittivity behaviors were observed at the tested frequency region. The CFF thermally conductive composites prepared by the above method have a broad application prospect in the field of advanced thermal management and electromagnetics.

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“…[1][2][3][4] Polymers have attracted increasing attention owing to their unique properties such as ease of processing, low weight, low cost, high chemical stability, and excellent mechanical properties [5][6][7] ; however, most polymers are thermal insulators, and their intrinsic TC is often <0.5 W/(mK). 8,9 To address this issue, various materials, such as metals (e.g., silver, 10 cupper 11 ), ceramic materials (e.g., boron nitride, [12][13][14] alumina, 15 alumina nitride 16 ), and carbonbased materials (e.g., carbon fiber (CF), [17][18][19][20] carbon nanotubes, 21,22 graphene, [23][24][25] graphite 26,27 ) have been incorporated into polymers to improve their TCs.…”

Section: Introductionmentioning

confidence: 99%

Modeling thermal conductivity of polymer/carbon fiber composites prepared by SCFNA method

He,

et al. 2023

Polymer Composites

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The spatial confining forced network assembly (SCFNA) has proven to be a promising method for greatly improving the thermal conductivity (TC) of polymer composites via transforming self‐assembled networks into force‐assembled networks in polymer matrices. Most of the models currently in use were derived to predict the TC of polymer composites with self‐assembled networks; however, these are not suitable for predicting the TC of polymer composites with force‐assembled networks. To address this issue, a TC prediction model for polymer/carbon fiber (CF) composites obtained using the SCFNA method was developed. First, a literature TC prediction model, built by abstracting a representative volume element (RVE) from a CF self‐assembled network, was utilized to determine the key parameters related to the CF distance. Thereafter, a modified RVE model was constructed based on the morphological characteristics of the force‐assembled network of CFs. In conjunction with the thermal resistance method, the TC values of the polymer composites were calculated and successfully validated using experimental data obtained by the SCFNA method. In this model, the compression ratio (ε) and a fitting coefficient f were applied to describe the relationship between self‐assembled and force‐assembled networks, and furthermore, the actual filler content in the force‐assembled network was calculated. It was found that as the ε value and filler content increased, f accordingly decreased; however, the calculated actual filler volume content in the force‐assembled network increased. These results possibly reflect the evolution of the CF microstructure obtained by the SCFNA method.Highlights Filler gaps in self‐assembled networks were studied using a literature model. The relationship between self‐assembled and force‐assembled networks was established. A thermal conductivity model of the force‐assembled network was established. The actual filler volume content in the force‐assembled network was calculated.

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Spherical boron nitride/pitch‐based carbon fiber/silicone rubber composites for high thermal conductivity and excellent electromagnetic interference shielding performance

Cited by 13 publications

References 46 publications

Preparation Methods and Properties of CNT/CF/G Carbon-Based Nano-Conductive Silicone Rubber

Preparation Methods and Properties of CNT/CF/G Carbon-Based Nano-Conductive Silicone Rubber

In Situ Construction of High-Thermal-Conductivity and Negative-Permittivity Epoxy/Carbon Fiber@Carbon Composites with a 3D Network by High-Temperature Chemical Vapor Deposition

Modeling thermal conductivity of polymer/carbon fiber composites prepared by SCFNA method

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