Noncovalent functionalization of carbon nanotubes using branched random copolymer for improvement of thermal conductivity and mechanical properties of epoxy thermosets

Tang, Yuyao; Zhao, Fangqiao; Fei, Xiaoma; Wei, Wei; Li, Xiaojie; Luo, Jing; Zhu, Ye; Liu, Xiaoya

doi:10.1002/pi.5622

Cited by 7 publications

(3 citation statements)

References 41 publications

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“…To improve performance and lifetime of epoxy thermosets, some researchers turn to filler reinforcements to enhance the thermal conductivity of epoxy matrices, resulting to improved thermal dissipation. 131,132 Although some improvements in thermal stability may be achieved with fillers, the long-term heat stability of these thermosets are still dependent on the epoxy matrix. With equilibrium molecular dynamics simulations, Li et al, investigated the thermal conductivities of cross-linked, parallel-linked and single chain epoxy resins.…”

Section: High Temperature Resinsmentioning

confidence: 99%

Multifunctionality in Epoxy Resins

2019

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Epoxy resin will continue to be in the forefront of many thermoset applications due to its versatile properties. However, with advancement in manufacturing, changing societal outlook for the chemical industries and emerging technologies that disrupt conventional approaches to thermoset fabrication, there is a need for a multifunctional epoxy resin that is able to adapt to newer and robust requirements. Epoxy resins that behave both like a thermoplastic and a thermoset resin with better properties are now the norm in research and development. In this paper, we viewed multifunctionality in epoxy resins in terms of other desirable properties such as its toughness and flexibility, rapid curing potential, self-healing ability, reprocessability and recyclability, high temperature stability and conductivity, which other authors failed to recognize. These aspects, when considered in the synthesis and formulation of epoxy resins will be a radical advance for thermosetting polymers, with a lot of applications. Therefore, we present an overview of the recent finding as to pave the way for varied approaches towards multifunctional epoxy resins.

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Section: High Temperature Resinsmentioning

confidence: 99%

Multifunctionality in Epoxy Resins

2019

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“…Jang et al 25 investigated the interaction between typical functional groups on CNTs and the epoxide groups of epoxy resin, resulting in enchanted thermal properties for the corresponding CNTs/epoxy composites. Tang et al 26 incorporating the functionalized CNTs into epoxy resins for improving the λ of the resulting composites. For a more effective improvement in the λ of CNTs/polymer composites, building a three-dimensional (3D) thermally conductive network within the matrix is a promising strategy.…”

Section: Introductionmentioning

confidence: 99%

Layered Montmorillonite/3D Carbon Nanotube Networks for Epoxy Composites with Enhanced Mechanical Strength and Thermal Properties

Tang

Zhang

Guo

et al. 2022

ACS Appl. Nano Mater.

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Because of their excellent thermal conductivities and high aspect ratios, carbon nanotubes (CNTs) exhibit great potential for use in microelectronic packaging. However, for their application in insulating materials, the high electroconductibility and poor radial conductivity of CNTs significantly limit their loading. In this work, a heterostructured “brushlike” hybrid was first prepared by anchoring aliphatic amine-functionalized multiwalled carbon nanotubes (MWCNTs) onto the insulating montmorillonite (Mt). The morphological characterizations of the heterostructured MWCNTs–Mt hybrids and epoxy composites were examined, revealing that a three-dimensional (3D) thermal conduction network within the matrix was constructed under the geometrical constraints of layered Mt. The synergistic effect of MWCNTs and Mt on the enhanced thermal conductivity and mechanical and thermal properties of the obtained composites was systematically established. The results showed that the thermal conductivity of MWCNTs–Mt/epoxy composites was significantly improved with the 0.5 wt % loading of hybrids, about 61% higher than that of pure epoxies; simultaneously, the dielectric loss of such composites was lower than that of pure epoxies at low frequencies, although the dielectric constant increased. Moreover, the mechanical properties and thermal stability of these composites were synchronously enhanced. This work provides a promising strategy for fabricating polymer composites with relatively high thermal conductivity, low dielectric loss, and excellent thermal stability and mechanical properties.

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“…Epoxy resin (EP) is one of the most important thermosetting resins globally, which is now broadly applied in various fields, such as coatings, adhesives, and flip chip encapsulation, for its excellent mechanical and thermal properties, as well as chemical resistance after being crosslinked into three‐dimensional networks . Curing agents are vital in the curing process, which greatly determine the final network architecture as well as the properties of the thermosets .…”

Section: Introductionmentioning

confidence: 99%

Thermal latent curing agent for epoxy resins from neutralization of 2‐methylimidazole with a phosphazene‐containing polyfunctional carboxylic acid

Wei

Sun

et al. 2020

Polymers for Advanced Techs

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A novel thermal latent curing agent, 2MZS, was obtained through the reaction of 2-methylimidazole (2MZ) and a symmetrically carboxyl-functionalized star-shaped molecule based on cyclotriphosphazene (N 3 P 3 -COOH). In the complex, the resonance of N 3 P 3 -COOH reduced the activity of lone electron pairs on the pyridine-type nitrogen atom of imidazole ring, suppressing the nucleophilic attack and crosslinking reaction between 2MZ and epoxy resin. As a result, the storage stability was improved distinctly for the one-pot epoxy compound, which could be steadily stored at room temperature for nearly 1 month. Nonisothermal DSC revealed a delayed initiation curing mechanism of the prepared one-pot system, and which could undergo rapid curing reaction upon raising the temperature. Moreover, the introduction of terminally polyfunctional star-shaped phosphazene derivative could promote the curing process at elevated temperature, as well as improve the chain rigidity of the cured resin by chemical incorporation into the cross-linked network, thus endowing the cured resin with enhanced glassy storage modulus. The epoxy thermoset exhibited the highest glass transition temperature and thermal degradation temperature when 20 wt% of 2MZS was used. It is suggested that the novel latent curing agent is potential for high-performance one-pot epoxy compound, particularly recommended for application in electronic packaging fields. K E Y W O R D Scuring agent, epoxy resin, imidazole, latent, phosphazene

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Noncovalent functionalization of carbon nanotubes using branched random copolymer for improvement of thermal conductivity and mechanical properties of epoxy thermosets

Cited by 7 publications

References 41 publications

Multifunctionality in Epoxy Resins

Multifunctionality in Epoxy Resins

Layered Montmorillonite/3D Carbon Nanotube Networks for Epoxy Composites with Enhanced Mechanical Strength and Thermal Properties

Thermal latent curing agent for epoxy resins from neutralization of 2‐methylimidazole with a phosphazene‐containing polyfunctional carboxylic acid

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