Self-networking of graphene in epoxy resin based on thermal induced dynamic chemical network

Sun, Rong; Jiang, Miao-Jie; Wu, Gang; Chen, Si-Chong; Chen, Li; Wang, Yu‐Zhong

doi:10.1016/j.coco.2023.101617

Cited by 6 publications

(2 citation statements)

References 58 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Epoxy resins have been widely used as thermal interface material in electronic components due to their excellent comprehensive performance, such as superior mechanical properties, high bonding strength, and well electrical insulation. − The intrinsic thermal conductivity of epoxy resins is poor (0.1–0.3 W m –1 K –1 ), which leads to an overload of thermal components and damaged devices. , Graphene, as a two-dimensional material with a honeycomb lattice of sp 2 carbon atoms, has an ultrahigh in-plane thermal conductivity (∼3500 W m –1 K –1 ). , Dispersing graphene into an epoxy matrix has great application potential in improving the composites’ thermal conductivity. , However, the effective thermal conductivity of the graphene/epoxy composites is low (<10 W m –1 K –1 ) relative to the high thermal conductivity of graphene . This is mainly attributed to the graphene–epoxy interfacial thermal resistance (ITR) and the graphene–graphene ITR within the composites. − …”

Section: Introductionmentioning

confidence: 99%

Interfacial Thermal Transport between Stacked Functionalized Graphene Nanoflakes

Zhang,

Shao,

Cao

et al. 2024

J. Phys. Chem. C

View full text Add to dashboard Cite

Graphene functionalization has been widely used in improving the thermal transport of graphene/epoxy composites owing to its performance in enhancing thermal conductivity and facilitating the formation of graphene networks. However, the heat transfer law and mechanism between functionalized graphene remain unclear. In this paper, the effects of distribution, type, and coverage of functional groups on the graphene−graphene interfacial thermal resistance (ITR) are analyzed by nonequilibrium molecular dynamics simulations. The results demonstrate that the graphene−graphene ITR depends on the synthetic effect of the graphene−graphene interaction, graphene−functional group interaction, and interaction between functional groups. The heat transfer contributions of those three interactions vary with the relative positions between functional groups. Then, the potential distribution of graphene is evaluated to compare the effects of different types of functional groups. It indicates that the potential difference is mainly attributed to functional groups. Compared with methyl, amino, and fluorine groups, hydroxyl groups have the largest potential difference and interaction. As the coverage of functional groups increases, the ITR of methylated graphene, aminated graphene, and hydroxylated graphene decreases inversely, whereas that of fluorinated graphene increases first and then decreases inversely. This work provides practical importance for the design and application of functionalized graphene in composite materials.

show abstract

Section: Introductionmentioning

confidence: 99%

Interfacial Thermal Transport between Stacked Functionalized Graphene Nanoflakes

Zhang,

Shao,

Cao

et al. 2024

J. Phys. Chem. C

View full text Add to dashboard Cite

show abstract

“…The use of these reinforcements into epoxy matrices leads to significant improvements in mechanical, electrical, or thermal properties [11][12][13][14][15], as well as to improve or achieve other functionalities such as Joule heating, self-healing, or shape memory [11,[16][17][18][19]. In this regard, the use of carbon-derived particles [14,[19][20][21][22][23][24][25][26][27], such as carbon nanotubes (CNTs), graphene nanoplatelets (GNPs), or short carbon fibers, has proved to be an efficient way to enhance the aforementioned properties, allowing in some cases to achieve multifunctional micro-or nanocomposites [11,16,17,19,21,28]. On the other hand, the introduction of a reinforcement in the polymeric matrix also implies a greater challenge for the recycling and recovery of the synthesized composite components [29,30].…”

Section: Introductionmentioning

confidence: 99%

Recyclable Multifunctional Nanocomposites Based on Carbon Nanotube Reinforced Vitrimers with Shape Memory and Joule Heating Capabilities

Cortés,

Sánchez-Romate,

Martinez-Diaz

et al. 2024

Polymers

View full text Add to dashboard Cite

The present study focuses on the multifunctional capabilities of carbon nanotube (CNT)-reinforced vitrimers. More specifically, the thermomechanical properties, the Joule effect heating capabilities, the electrical conductivity, the shape memory, and the chemical recycling capacity are explored as a function of the CNT content and the NH2/epoxy ratio. It is observed that the electrical conductivity increases with the CNT content due to a higher number of electrical pathways, while the effect of the NH2/epoxy ratio is not as prevalent. Moreover, the Tg of the material decreases when increasing the NH2/epoxy ratio due to the lower cross-link density, whereas the effect of the CNTs is more complex, in some cases promoting a steric hindrance. The results of Joule heating tests prove the suitability of the proposed materials for resistive heating, reaching average temperatures above 200 °C when applying 100 V for the most electrically conductive samples. Shape memory behavior shows an outstanding shape fixity ratio in every case (around 100%) and a higher shape recovery ratio (95% for the best-tested condition) when decreasing the NH2/epoxy ratio and increasing the CNT content, as both hinder the rearrangement of the dynamic bonds. Finally, the results of the recyclability tests show the ability to regain the nanoreinforcement for their further use. Therefore, from a multifunctional analysis, it can be stated that the proposed materials present promising properties for a wide range of applications, such as Anti-icing and De-icing Systems (ADIS), Joule heating devices for comfort or thermotherapy, or self-deployable structures, among others.

show abstract

Exfoliation and dispersion of graphene nanoplatelets for epoxy nanocomposites

La,

Nguyen,

Tran

et al. 2024

Advanced Nanocomposites

View full text Add to dashboard Cite

Self-networking of graphene in epoxy resin based on thermal induced dynamic chemical network

Cited by 6 publications

References 58 publications

Interfacial Thermal Transport between Stacked Functionalized Graphene Nanoflakes

Interfacial Thermal Transport between Stacked Functionalized Graphene Nanoflakes

Recyclable Multifunctional Nanocomposites Based on Carbon Nanotube Reinforced Vitrimers with Shape Memory and Joule Heating Capabilities

Exfoliation and dispersion of graphene nanoplatelets for epoxy nanocomposites

Contact Info

Product

Resources

About