Epoxy resin composites with commercially available graphene: toward high toughness and rigidity

Jian-xiang, Sun; Ji, Jingqi; Chen, Zhigeng; Liu, Shumei; Zhao, Jianqing

doi:10.1039/c9ra05992j

Cited by 10 publications

(2 citation statements)

References 37 publications

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“…[1][2][3][4] However, considering their unique chemical and highly cross-linked structures, conventional epoxy resins DOI: 10.1002/macp.202300351 have shortcomings such as poor heat and weather resistance, and brittleness. [5,6] These drawbacks severely limit their applications as matrix of high-performance composite. Therefore, toughening modification of epoxy resins is a real challenge for technological development.…”

Section: Introductionmentioning

confidence: 99%

Synchronously Improving Mechanical and Thermal Performances of Cured Epoxy Resins by Epoxidized Polyether Sulphones as Modifiers

Xu,

Wang,

Chen

et al. 2023

Macro Chemistry & Physics

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As an effort to improve toughness of epoxy resins without scarifying their heat resistance, four novel polyether sulphones (PESs) with epoxy groups (PES‐Es) are developed as efficient toughness modifiers of epoxy resins. The influences of PES‐E on the mechanical property, curing kinetics, thermal, and mechanical properties of the diglycidyl ether with bisphenol‐A (DGEBA) are investigated. The impact strength of PES‐E/DGEBA composites is significantly improved from 16.6 to 28.9 kJ m−2 with optimal content of PES‐E. Different from the composites of typical PES and epoxy which have two‐phase structure, PES‐E/DGEBA composites exhibit a single‐phase structure owing to the participation of PES‐E in the curing reaction of epoxy groups and good solubility of PES‐E in DGEBA. Furthermore, the thermal stability of the PES‐E/DGEBA composites is slightly increased compared to the neat epoxy resin due to the formation of crosslinked semi‐interpenetrating polymer networks. The glass transitionnal temperature (Tg) of PES‐E/DGEBA composites is up to about 184 °C, 46 °C higher than the neat epoxy resin with the same hardener, which have great potential in high‐performance composites. The method developed in this seminal report makes it possible to improve the toughness of epoxy resins without trading‐off the Tg and tensile strength.

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Section: Introductionmentioning

confidence: 99%

Synchronously Improving Mechanical and Thermal Performances of Cured Epoxy Resins by Epoxidized Polyether Sulphones as Modifiers

Xu,

Wang,

Chen

et al. 2023

Macro Chemistry & Physics

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show abstract

“…The process involved a mixture of two materials for homogeneity, followed by vacuum drying at 60 • C for 24 h. To improve the mechanical properties of the composites, annealing was carried out at 90 • C for 5 h. These examples highlight the limitations of pre-and post-treatment processes in the current methods. Furthermore, epoxy and graphene paste are also popular choices for composite manufacturing due to their properties and ease of use [34][35][36]. However, the limitations are a long curing time and variations for different materials [28][29][30][31][32][33].…”

Section: Introductionmentioning

confidence: 99%

Experimental Analysis of Plastic-Based Composites Made by Composite Plastic Manufacturing

2022

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The significance of composites cannot be overstated in the manufacturing sector due to their unique properties and high strength-to-weight ratio. The use of thermoplastics for composites manufacturing is also gaining attention due to their availability, ease of operation, and affordability. However, the current methods for plastic-based composites are limited due to the requirements of long curing times and pre- and post-treatment, thereby resulting in longer lead times for the desired product. These methods also limit the freedom to operate with different forms of materials. Therefore, a new manufacturing process for plastic-based composites is required to overcome such limitations. This research presents a new manufacturing process to produce high-quality plastic-based composites with bespoke properties for engineering applications. The process is referred to as Composite Plastic Manufacturing (CPM) and is based on the principle of fused filament fabrication (FFF) equipped with a heat chamber. The process integrates two material extrusion additive manufacturing technologies, i.e., filament and syringe extrusion. The paper presents the principle of the process, both in theory and in practice, along with the methodology and materials used to manufacture plastic composites. Various composites have been manufactured using the CPM process with thermally activated materials and tested according to British and International standards. Polylactic Acid (PLA) has been interlaced with different thermally activated materials such as graphene-carbon hybrid paste, heat cure epoxy paste, and graphene epoxy paste. The process is validated through a comparative experimental analysis involving tests such as ultrasonic, tensile, microstructural, and hardness to demonstrate its capabilities. The results have been compared with commercially available materials (PLA and Graphene-enhanced PLA) as well as literature to establish the superiority of the CPM process. The CPM composites showed an increase of up to 10.4% in their tensile strength (54 MPa) and 8% in their hardness values (81 HD) when compared to commercially available PLA material. The composites manufactured by CPM have also shown strong bonding between the layers of PLA and thermally activated materials; thus, highlighting the effectiveness of the process. Furthermore, the composites showed a significant increase of up to 29.8% in their tensile strength and 24.6% in their hardness values when compared to commercially available Graphene-enhanced PLA material. The results show that the CPM process is capable of manufacturing superior quality plastic composites and can be used to produce products with bespoke properties.

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Study of electrical properties of graphene /epoxy resin composites induced by external electric field

Qin,

Wu,

Wang

et al. 2024

J Polym Res

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Epoxy resin composites with commercially available graphene: toward high toughness and rigidity

Abstract: Commercially available graphene was exfoliated into monolayers via a facile way for application in epoxy resin.

Cited by 10 publications

References 37 publications

Synchronously Improving Mechanical and Thermal Performances of Cured Epoxy Resins by Epoxidized Polyether Sulphones as Modifiers

Synchronously Improving Mechanical and Thermal Performances of Cured Epoxy Resins by Epoxidized Polyether Sulphones as Modifiers

Experimental Analysis of Plastic-Based Composites Made by Composite Plastic Manufacturing

Study of electrical properties of graphene /epoxy resin composites induced by external electric field

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