Effect of elastic modulus mismatch of epoxy/titanium dioxide coated silver nanowire composites on the performance of thermal conductivity

Jiang, Yunliang; Li, Maoyuan; Chen, Chao; Xue, Zhigang; Xie, Xiaolin; Zhou, Xingping; Mai, Yiu‐Wing

doi:10.1016/j.compscitech.2018.06.028

Cited by 46 publications

(20 citation statements)

References 50 publications

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“…Epoxies with cross-linked network structure exhibit excellent mechanical properties, good chemical stability and durability, which makes them widely used in electronic packaging and the automotive and aerospace fields [1,2,3,4]. However, the high cross-linked structure also makes the epoxy have low toughness and poor impact and crack resistance, which limits its application in the high-end fields as a structural material [5,6].…”

Section: Introductionmentioning

confidence: 99%

Effect of Stone-Wales Defect on Mechanical Properties of Gr/epoxy Nanocomposites

Chen

Zheng

et al. 2019

Polymers

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Due to its superior mechanical properties, graphene (Gr) has the potential to achieve high performance polymer-based nanocomposites. Previous studies have proved that defects in the Gr sheets could greatly reduce the mechanical properties of Gr, while the Stone-Wales (SW) defect was found to enhance the interfacial mechanical strength between Gr and epoxy. However, the combined effects of defects on the overall mechanical properties of Gr/epoxy nanocomposites have not been well understood. In this paper, the effect of the SW defect on the mechanical properties of Gr/epoxy nanocomposites was systematically investigated by using molecular dynamic simulations. The simulation results showed that the SW defect would degrade the mechanical properties of nanocomposites, including the Young’s modulus and in-plane shear modulus. Surprisingly, the transverse shear modulus could be remarkably enhanced with the existence of SW. The reinforcing mechanisms were mainly due to two aspects: (1) the SW defect could increase the surface roughness of the Gr, preventing the slippage between Gr and epoxy during the transverse shea; and (2) the nanocomposite with defective Gr enables a higher interaction energy than that with perfect graphene. Additionally, the effects of temperature, the dispersion and volume fraction of Gr were also investigated.

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Section: Introductionmentioning

confidence: 99%

Effect of Stone-Wales Defect on Mechanical Properties of Gr/epoxy Nanocomposites

Chen

Zheng

et al. 2019

Polymers

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“…Accordingly, we calculated the lattice parameter of the powders after different times of HF etching using the XRD patterns of samples. For the cubic structures, the lattice parameters can be calculated using the Bragg equation, as presented in Equation (1).…”

Section: Discussion Of the Mechanisms Of Shape Evolution Of Ticmentioning

confidence: 99%

“…Titanium carbide (TiC) has attracted great attention in many applications as cutting tools, reinforcements in composite materials, and wear resistance materials due to its unique properties such as high melting point, high chemical stability, and outstanding mechanical properties. [1][2][3][4][5][6][7] Since the morphology of the TiC plays a vital role in its performance in the mentioned applications, the morphological controlling of the TiC is very important. [8][9][10] Till now, various methods including chemical vapor deposition (CVD) and powder metallurgy have been proposed for the fabrication of TiC.…”

Section: Introductionmentioning

confidence: 99%

Morphological evolution of TiC particles with different stoichiometries by hydrofluoric acid etching treatment

Aghamohammadi

Heidarpour

2021

Int J Applied Ceramic Tech

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The effects of hydrofluoric acid (HF) etching time on the morphology of the titanium carbide (TiC) particles with different stoichiometries were investigated. TiC particles with two C/Ti molar ratios of 0.5 and 1.0 were prepared by mechanical alloying.Then, the powders were immersed in the HF solution for different times of 48, 96, and 142 h. Results showed that the morphology of TiC particles greatly changed after HF etching. In general, a roughing phenomenon was observed as a function of the immersion time in the HF solution. The irregular shape of the TiC particles changed to the spherical shapes by increasing the HF etching time. However, the changing tendency of TiC particles with different stoichiometries was different. The shape of prepared powders with a C/Ti molar ratio of 1.0 was polyhedron at the initial stages of HF treatment, while the shape of prepared powders with a C/Ti molar ratio of 0.5 was near-spherical. However, with increasing the immersion time, the shape of both samples changed to a spherical one. The degree of roughing phenomenon of the prepared powders with a C/Ti molar ratio of 0.5 was lower than that of the prepared powders with a C/Ti molar ratio of 1.0.

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“…14,15 In recent years, single and/or hybrid ceramics (such as boron nitride (BN), 16 aluminum nitride (AlN), 17 silicon carbide (SiC), 18 etc.) and metals (such as copper (Cu), 19 silver (Ag), 20 aluminum (Al), 21 etc.) have served as fillers to enhance the λ values of polymers.…”

Section: Introductionmentioning

confidence: 99%

Reduced Graphene Oxide Heterostructured Silver Nanoparticles Significantly Enhanced Thermal Conductivities in Hot-Pressed Electrospun Polyimide Nanocomposites

Guo

Yang

Ruan

et al. 2019

ACS Appl. Mater. Interfaces

302

152

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Graphene presents an extremely ultra-high thermal conductivity, well above other known thermally conductive fillers. However, graphene tends to aggregate easily due to its strong intermolecular π−π interaction, resulting in poor dispersion in the polymer matrix. In this study, silver nanoparticles anchored reduced graphene oxide (Ag/rGO) were first prepared using one-pot synchronous reduction of Ag + and GO solution via glucose. The thermally conductive (Ag/rGO)/polyimide ((Ag/rGO)/PI) nanocomposites were then obtained via electrospinning the in situ polymerized (Ag/rGO)/polyamide electrospun suspension followed by a hot-press technique. The thermal conductivity (λ), glass transition temperature (T g ), and heat resistance index (T HRI ) of the (Ag/rGO)/PI nanocomposites all increased with increasing the loading of Ag/rGO fillers. When the mass fraction of Ag/rGO (the weight ratio of rGO to Ag was 4:1) fillers was 15%, the corresponding (Ag/rGO)/PI nanocomposites showed a maximum λ of 2.12 W/(m K). The corresponding T g and T HRI values were also enhanced to 216.1 and 298.6 °C, respectively. Furthermore, thermal conductivities calculated by our established improved thermal conduction model were relatively closer to the experimental results than the results obtained from other classical models.

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Effect of elastic modulus mismatch of epoxy/titanium dioxide coated silver nanowire composites on the performance of thermal conductivity

Cited by 46 publications

References 50 publications

Effect of Stone-Wales Defect on Mechanical Properties of Gr/epoxy Nanocomposites

Effect of Stone-Wales Defect on Mechanical Properties of Gr/epoxy Nanocomposites

Morphological evolution of TiC particles with different stoichiometries by hydrofluoric acid etching treatment

Reduced Graphene Oxide Heterostructured Silver Nanoparticles Significantly Enhanced Thermal Conductivities in Hot-Pressed Electrospun Polyimide Nanocomposites

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