Graphene/epoxy nanocomposites for improved fracture toughness: A focused review on toughening mechanism

“…35 Because of their remarkable mechanical qualities, corrosion resistance, and simplicity of manufacture, epoxy composites have emerged as versatile materials with numerous uses in various sectors. 36 In recent years, they have been used in biomedical engineering, where materials must fulfill high biocompatibility and performance demands. Biomedical engineering is a multidisciplinary area that applies engineering principles and materials to developing medical devices, diagnostics, and therapeutics.…”

Section: Introductionmentioning

confidence: 99%

“…Because of their remarkable mechanical qualities, corrosion resistance, and simplicity of manufacture, epoxy composites have emerged as versatile materials with numerous uses in various sectors . In recent years, they have been used in biomedical engineering, where materials must fulfill high biocompatibility and performance demands.…”

Section: Introductionmentioning

confidence: 99%

Plain-Woven Areca Sheath Fiber-Reinforced Epoxy Composites: The Influence of the Fiber Fraction on Physical and Mechanical Features and Responses of the Tribo System and Machine Learning Modeling

Subramanyam,

Kotikula,

Bennehalli

et al. 2024

ACS Omega

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Recent studies focus on enhancing the mechanical features of natural fiber composites to replace synthetic fibers that are highly useful in the building, automotive, and packing industries. The novelty of the work is that the woven areca sheath fiber (ASF) with different fiber fraction epoxy composites has been fabricated and tested for its tribological responses on three-body abrasion wear testing machines along with its mechanical features. The impact of the fiber fraction on various features is examined. The study also revolves around the development and validation of a machine learning predictive model using the random forest (RF) algorithm, aimed at forecasting two critical performance parameters: the specific wear rate (SWR) and the coefficient of friction (COF). The void fraction is observed to vary between 0.261 and 3.8% as the fiber fraction is incremented. The hardness of the mat rises progressively from 40.23 to 84.26 HRB. A fair ascent in the tensile strength and its modulus is also observed. Even though a short descent in flexural strength and its modulus is seen for 0 to 12 wt % composite specimens, they incrementally raised to the finest values of 52.84 and 2860 MPa, respectively, pertinent to the 48 wt % fiber-loaded specimen. A progressive rise in the ILSS and impact strength is perceptible. The wear behavior of the specimens is reported. The worn surface morphology is studied to understand the interface of the ASF with the epoxy matrix. The RF model exhibited outstanding predictive prowess, as evidenced by high R-squared values coupled with low mean-square error and mean absolute error metrics. Rigorous statistical validation employing paired t tests confirmed the model's suitability, revealing no significant disparities between predicted and actual values for both the SWR and COF.

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“…Notably, epoxy (EP) thermosets are one of the main resins that can benefit from the use of graphene as a reinforcement [ 2 ]. Their synergistic performance leads to improved dielectric properties [ 3 ], corrosion prevention [ 4 ], or enhanced fracture toughness [ 5 ], among other remarkable features. Epoxy-reinforced graphene nanoplatelets have found application in fields such as the aerospace industry, mostly as adhesives [ 6 ], anti-icing and deicing coatings [ 7 ], or as electromagnetic interference shielding (EMI) devices [ 8 ].…”

Section: Introductionmentioning

confidence: 99%

Ultrasonication Influence on the Morphological Characteristics of Graphene Nanoplatelet Nanocomposites and Their Electrical and Electromagnetic Interference Shielding Behavior

Collado,

Jiménez-Suárez,

Vázquez-López

et al. 2024

Polymers

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Graphene nanoplatelets (GNPs)/epoxy composites have been fabricated via gravity molding. The electrical and thermal properties of the composites have been studied with variable GNP type (C300, C500, and C750, whose surface areas are ~300, 500, and 750 m2/g, respectively), GNP loading (5, 10, 12, and 15 wt.%), and dispersion time via ultrasonication (0, 30, 60, and 120 min). By increasing the time of sonication of the GNP into the epoxy matrix, the electrical conductivity decreases, which is an effect of GNP fragmentation. The best results were observed with 10–12% loading and a higher surface area (C750), as they provide higher electrical conductivity, thereby preserving thermal conductivity. The influence of sonication over electrical conductivity was further analyzed via the study of the composite morphology by means of Raman spectroscopy and X-ray diffraction (XRD), providing information about the aspect ratio of GNPs. Moreover, electromagnetic shielding (EMI) has been studied up to 4 GHz. Composites with C750 and 120 min ultrasonication show the best performance in EMI shielding, influenced by their higher electrical conductivity.

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Graphene/epoxy nanocomposites for improved fracture toughness: A focused review on toughening mechanism

Cited by 45 publications

References 175 publications

Recent development of manganese dioxide-based materials as zinc-ion battery cathode

Recent development of manganese dioxide-based materials as zinc-ion battery cathode

Plain-Woven Areca Sheath Fiber-Reinforced Epoxy Composites: The Influence of the Fiber Fraction on Physical and Mechanical Features and Responses of the Tribo System and Machine Learning Modeling

Ultrasonication Influence on the Morphological Characteristics of Graphene Nanoplatelet Nanocomposites and Their Electrical and Electromagnetic Interference Shielding Behavior

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