Silica binary hybrid particles based on reduced graphene oxide for natural rubber composites with enhanced thermal conductivity and mechanical properties

Li, Xinyu; Lv, Xiaohui; Tian, Qingfeng; AlMasoud, Najla; Xu, Yan; Alomar, Taghrid S.; El‐Bahy, Zeinhom M.; Li, Jiantong; Algadi, Hassan; Roymahapatra, Gourisankar; Ding, Tao; Guo, Jiang; Li, Xiaohong

doi:10.1007/s42114-023-00703-7

Adv Compos Hybrid Mater

2023

DOI: 10.1007/s42114-023-00703-7

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Silica binary hybrid particles based on reduced graphene oxide for natural rubber composites with enhanced thermal conductivity and mechanical properties

Xinyu Li¹,

Xiaohui Lv²,

Qingfeng Tian³

et al.

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2024

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Cited by 11 publications

(1 citation statement)

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“…9,10 Doping thermally conductive fillers in polymers to increase TC is a very practical method, 11 such as AlN, 12,13 Al 2 O 3 , [14][15][16] SiC, 17 SiO 2 , 18 MgO, 19 BN, [20][21][22][23] and carbon-based fillers. [24][25][26] However, in practical applications, due to poor compatibility between thermally conductive fillers and the matrix, high filling amounts are often required to achieve high TC, resulting in higher costs, heavier quality, and worse processability. [27][28][29] Reducing the interfacial thermal resistance between the filler and the matrix by modifying the filler surface has been proven to be an effective solution to increase TC.…”

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Thermal conductive nylon 6 composites using hybrid fillers to construct a three‐dimensional thermal conductive network

Li,

Rao,

Hong

et al. 2024

Polymer Composites

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The rapid progress in miniaturization and integration of semiconductor power devices has made heat dissipation a critical concern in the development of high‐performance semiconductor devices, thereby increasing the demands for the heat transfer efficiency of polymer composites. To address this issue, an efficient three‐dimensional (3D) heat conduction network structure is constructed in the polymer matrix by leveraging the mutual reaction of amino and epoxy groups on the surface of the filler treated by coupling during the melt mixing process, this approach leads to an enhancement in the thermal conductivity of the composites. First, the inert surfaces of graphene nanosheets (EX‐G) and carbon fibers (CF) are coated with polydopamine (PDA) to form active sites. Subsequently, the graphene (EX‐G), alumina (Al2O3), and carbon fiber (CF) are treated with an amine coupling agent (KH550) and epoxy coupling agent (KH560), respectively. Notably, at a filler content of 25 wt%, the thermal conductivity (TC) of the composites increases by approximately 282% compared to pure nylon 6. This research contributes novel insights into the field of thermally conductive polymer composites.Highlights The surface of the EX‐G and CF covered by PDA generates active sites. Fillers reduce the interface thermal resistance through chemical bonds. Fillers surface reaction builds a 3D thermal conductive network. 3D network structure can significantly improve the TC of composites. Only 25 wt% of hybrid fillers in a 282% increased TC of composites.

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mentioning

confidence: 99%

Thermal conductive nylon 6 composites using hybrid fillers to construct a three‐dimensional thermal conductive network

Li,

Rao,

Hong

et al. 2024

Polymer Composites

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Debridement Strategy by Pre‐Bending Passivation for Flexible All‐Inorganic Perovskite Solar Cells Beyond 70 000 Bending Cycles

Liu,

Xu,

Han

et al. 2024

Adv Funct Materials

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The mechanical durability and efficiency of all‐inorganic flexible perovskite solar cells (f‐PSCs) still require enhancement for practical applications. In this study, a creative debridement strategy to improve the mechanical durability and photovoltaic performance of all‐inorganic f‐PSCs by pre‐bending the flexible perovskite film and then depositing the passivation agent 2‐mercaptopyridine is proposed. The pre‐bending process induced the generation of microcracks in the perovskite film surface, and 2‐mercaptopyridine can more effectively penetrate the interior of the film through the microcracks, thereby further passivating deep surface defects. These microcracks and defects can be perfectly repaired by 2‐mercaptopyridine. Bidentate coordination sites of S and N in 2‐mercaptopyridine show stronger binding energy with surface defects. The debridement strategy effectively enhanced the crystallization of the film surface and markedly inhibited crack propagation during the film's bending process. The optimized device achieves a champion power conversion efficiency (PCE) of 14.74%. The pre‐bent and passivated all‐inorganic f‐PSC shows 104% of its initial PCE after 15 000 bending cycles at a curvature radius of 3 mm. Remarkably, even after undergoing 70 000 bending cycles at a curvature radius of 5 mm, pre‐bent, and passivated f‐PSC can retain over 93% of its initial PCE, exhibiting excellent mechanical durability.

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Dielectric thermally conductive boron nitride/silica@MWCNTs/polyvinylidene fluoride composites via a combined electrospinning and hot press method

Wu,

Gao,

Wang

et al. 2024

J Mater Sci: Mater Electron

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With the development of microelectronics towards integration, miniaturization and high power, the accumulation of heat in this small space has become a serious problem. Therefore, polymer matrix composites with high thermal conductivity and electrical insulation need to be developed urgently. Here, an ordered oriented boron nitride/silicon dioxide (silica) coated multiwalled carbon nanotubes (BN/SiO2@MWCNTs) thermally conductive network was constructed in a polyvinylidene fluoride (PVDF) matrix by electrostatic spinning technique, and subsequently the PVDF composites were prepared by hot-pressing. The synergistic effect of two-dimensional BN and one-dimensional MWCNTs in PVDF was investigated. It was found that the out-of-plane thermal conductivity of BN30/SiO2@MWCNTs composites reached 0.4693 Wm−1 K−1, which was 209% higher than that of pure PVDF and 10% higher than that of BN/PVDF composites. The in-plane thermal conductivity of BN30/SiO2@MWCNts) composites reached 1.5642 Wm−1 K−1, which was 1055% higher than pure PVDF and 40% higher than BN/PVDF composites. This is attributed to the synergistic effect of BN on SiO2@MWCNTs. Meanwhile, the volume resistivity and breakdown strength of the BN/SiO2@MWCNTs/PVDF composites reached 3.6 × 1013 Ω m and 47.68 kV/mm, respectively. The results indicate that the BN30/SiO2@MWCNTs/PVDF composites have excellent thermal conductivity and electrical insulating properties, which are promising for microelectronics applications.

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Silica binary hybrid particles based on reduced graphene oxide for natural rubber composites with enhanced thermal conductivity and mechanical properties

Cited by 11 publications

References 51 publications

Thermal conductive nylon 6 composites using hybrid fillers to construct a three‐dimensional thermal conductive network

Thermal conductive nylon 6 composites using hybrid fillers to construct a three‐dimensional thermal conductive network

Debridement Strategy by Pre‐Bending Passivation for Flexible All‐Inorganic Perovskite Solar Cells Beyond 70 000 Bending Cycles

Dielectric thermally conductive boron nitride/silica@MWCNTs/polyvinylidene fluoride composites via a combined electrospinning and hot press method

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