Development of recyclable carbon fiber-reinforced plastics (CFRPs) with controlled degradability and stability using acetal linkage-containing epoxy resins

Kakichi, Yoshinori; Yamaguchi, Ayaka; Hashimoto, Tamotsu; Urushisaki, Michio; Sakaguchi, Toshikazu; Kawabe, Kentaro; Kondo, Keiichi; Iyo, Hirohumi

doi:10.1038/pj.2017.68

Cited by 16 publications

(9 citation statements)

References 15 publications

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“…Epoxy resins are a promising adhesive material for transportation systems such as airplanes and automobiles thanks to their strong adhesive capability, lighter weight, and greater stiffness. − In general, a base resin and a curing agent, which are generally epoxy and amine compounds, respectively, are mixed to promote their cross-linking reaction. This leads to the formation of a three-dimensional network, which plays important roles in the modulus, thermal expansion, fracture behavior, and adhesive properties. − Because the adhesive material is coated on the solid surface, it is vitally important that a better understanding of the molecular picture of the performance and durability of the adhesion technology at the interface is obtained. However, the details of the interfacial chemical reaction can be experimentally difficult to understand because the thermodynamics and kinetics at the interface are not the same as those in the corresponding bulk system .…”

Section: Introductionmentioning

confidence: 99%

Molecular Events for an Epoxy–Amine System at a Copper Interface

Yamamoto

Kuwahara

Aoki

et al. 2020

ACS Appl. Polym. Mater.

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Epoxy is a class of thermosetting resins and has been widely used as a representative example of structural adhesives. Nevertheless, it remains unclear how the epoxy resin and curing agent are present on the adherend surface and how they move around dynamically and react with each other to form a three-dimensional network. We here adopt a fully atomistic molecular dynamics (MD) simulation to study molecular events of an epoxy resin composed of hydrogenated bisphenol A diglycidyl ether and 1,4-cyclohexanebis(methylamine) at the interface using a narrow gap, which was sandwiched between copper surfaces. The depth profiles of the density, molecular orientation, and concentration in addition to molecular diffusivity at the interface are addressed. These are finally combined with the kinetics for the curing reactions at the interface. Although some of the information here obtained is accessible by experimentation, most is not. We believe that the findings of this study will lead to a better understanding of the adhesion phenomenon.

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Section: Introductionmentioning

confidence: 99%

Molecular Events for an Epoxy–Amine System at a Copper Interface

Yamamoto

Kuwahara

Aoki

et al. 2020

ACS Appl. Polym. Mater.

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“…Epoxy resins, a class of thermosetting resins, have found use in a wide range of applications such as coating agents, adhesives, encapsulants, composites, , and so forth − thanks to their favorable mechanical properties, thermal properties, and solvent stability. Epoxy resins are based on a three-dimensional network formed via the curing reaction of epoxy and amino compounds.…”

Section: Introductionmentioning

confidence: 99%

Mesoscopic Heterogeneity in the Curing Process of an Epoxy–Amine System

et al. 2019

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Epoxy resins are composed of a three-dimensional network formed by chemical reactions between epoxy and amino compounds, which plays an important role in the mechanical properties. Thus, to use epoxy resins in various applications, it is necessary to gain a better understanding of their network structure. Here, we study the structural heterogeneity evolved in an epoxy−amine mixture during the curing process on the basis of a particle tracking technique, in which the thermal motion of probe particles in the mixture was tracked, small-angle X-ray scattering measurements in conjunction with coarse-grained molecular dynamics simulation. The heterogeneous environment was generated even at the initial stage of the curing process. Notably, the characteristic length scale was on the order of several hundreds of nanometers down to several tens of nanometers, depending on the extent of curing. Once a reaction occurs between a pair of epoxy and amino groups, the temperature at the site is locally elevated due to the heat of formation, accelerating a subsequent reaction nearby. Repeating such a situation, actively and scarcely reacted domains are formed. This is the main origin of the structural heterogeneity in epoxy resins.

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“…In the recent development, the applications of CFC are not exclusively in the aerospace fields but also included in different applications such as automotive, buildings and bridges, blades, and different sectors. The advantages of the CFC that lightweight, high strength to weight ratio, corrosion resistance, easy to assembly and can be used in wider temperatures were the reason why CFC is used although the price is still high [9][10][11][12][13]. The following description of the selected CFC papers is shown and described.…”

Section: Carbon Fiber Compositesmentioning

confidence: 99%

The Progressive Development Of Multifunctional Composite Materials In Different Applications

Muflikhun

2020

Angkasa

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Composite materials gain huge interest from researchers due to its advantages and flexibility. Strength and properties that can be adjusted based on the needs and applications is a specific advantage of composite materials. Since these advantages can be applied in many fields, composite materials often clustered in multifunctional materials. This study aims to lists and classified the progressive development of multifunctional composite materials that found and already proven can be applied in many applications. This study also gives data that can be driven to readers from different backgrounds and used it for further purposes. The results are shown that the progressive development of multifunctional composite materials not only one step forward in the technical achievements but also the energy and environment-related to human ecosystems.

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Development of recyclable carbon fiber-reinforced plastics (CFRPs) with controlled degradability and stability using acetal linkage-containing epoxy resins

Cited by 16 publications

References 15 publications

Molecular Events for an Epoxy–Amine System at a Copper Interface

Molecular Events for an Epoxy–Amine System at a Copper Interface

Mesoscopic Heterogeneity in the Curing Process of an Epoxy–Amine System

The Progressive Development Of Multifunctional Composite Materials In Different Applications

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