Advances and outlook in modified graphene oxide (GO)/epoxy composites for mechanical applications

Guo, Liangchao; Chen, Zhaofu; Han, Haoran; Liu, Gang; Luo, Mingtao; Cui, Naiyuan; Dong, Hang; Li, Ming-Zheng

doi:10.1007/s13204-022-02653-w

Cited by 10 publications

(8 citation statements)

References 102 publications

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“…Secondly, TDE85‐GO can react with the curing agent and form covalent bonds with the epoxy matrix, thereby enhancing the interaction between the matrix and the TDE85‐GO sheet. When the matrix is deformed by an external force, the TDE85‐GO sheets can effectively transfer stress and generate numerous micro deformation zones within the matrix to absorb energy 35 . Thirdly, the rough fracture surfaces of TDE85‐GO/epoxy composites are attributed to crack pinning.…”

Section: Resultsmentioning

confidence: 99%

“…When the matrix is deformed by an external force, the TDE85-GO sheets can effectively transfer stress and generate numerous micro zones within the matrix to absorb energy. 35 Thirdly, the rough fracture surfaces of TDE85-GO/epoxy composites are attributed to crack pinning. A propagating crack front encounters impenetrable GO sheet obstacles, resulting in the deflection of the crack front.…”

Section: Mechanical Properties Of Tde85-go/epoxy Compositesmentioning

confidence: 99%

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In situ exfoliation and surface functionalization of graphene oxide for epoxy composites with improved thermal and mechanical properties

Xue,

Xing,

Sun

et al. 2023

Polymer Composites

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Wet mixing and solvent evaporation were used to prepare in situ exfoliation and surface functionalization of graphene oxide (GO). The structure and composition of diglycidyl 7‐oxabicyclo[4.1.0]heptane‐3,4‐dicarboxylate (TDE85) functionalized GO (TDE85‐GO) were characterized. A thorough investigation was done into how surface functionalization affected the shape and dispersion of GO as well as the mechanical and thermal performance of the TDE85‐GO/epoxy composites. TDE85‐GO was evenly distributed throughout the matrix as a result of the special preparation method and excellent interfacial interaction between the functionalized GO and epoxy. By incorporating 0.5 wt% of TDE85‐GO, the molecular weight between crosslinks decreased from 435.1 to 182.0 g/mol, and the glass transition temperature significantly increased by 45.7°C from 148.8 to 194.5°C. The tensile strength, Young's modulus, and elongation at break increased by 18.3%, 3.7%, and 29.9%, respectively. Moreover, thermomechanical and water resistance properties have also been improved. This approach is a workable one to produce high‐performance structural composites. This approach represents a practical strategy for developing high‐performance structural composites.Highlights In situ exfoliation and surface functionalization of graphene oxide. Glass transition temperature increased by 45.7°C with 0.5 wt% of TDE85‐GO. Tensile, thermomechanical, and water resistance properties were improved.

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Section: Resultsmentioning

confidence: 99%

Section: Mechanical Properties Of Tde85-go/epoxy Compositesmentioning

confidence: 99%

In situ exfoliation and surface functionalization of graphene oxide for epoxy composites with improved thermal and mechanical properties

Xue,

Xing,

Sun

et al. 2023

Polymer Composites

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“…11 Moreover, the medical industry has also started to explore the potential of epoxy prepregs for use in prosthetic devices and surgical equipment, capitalizing on their biocompatibility, strength, and corrosion resistance. 12 Despite the myriad advantages of, several limitations warrant consideration. One of the primary drawbacks associated with epoxy prepregs is their elevated cost, which can be attributed to the intricacy of the manufacturing process and the necessity for specialized equipment.…”

Section: Introductionmentioning

confidence: 99%

Assessment of E‐glass/epoxy prepreg aging via analytical, physical and mechanical techniques

Dobhal,

Das,

Sharma

et al. 2024

Polymer Composites

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E‐glass/epoxy prepregs are undisputedly a great advancement in processing and fabrication technology. They offer immense advantages over conventional composite manufacturing processes in terms of waste reduction and efficient manufacturing times. These prepregs are used in several industries including but not limited to automobile, construction, defense and aerospace. Their versatility and wide applicability however is shadowed by intricate storage and handling requirements. Prepregs usually need to be stored at below freezing temperatures and hence lose their chemical integrity during transportation if not handled properly leading to a lot of wastage and scrap generation. Therefore, it is essential to develop a rigorous regime in order to determine the shelf‐life and usability of these prepregs. Hereby, we report an extensive experimental design for assessing shelf‐life of commercially available prepregs using techniques like DSC and IR and corelating the findings with mechanical data. The degree of pre‐cure increased to 30% as a result of exposure to moisture over prolonged time and a substantial decrease in mechanical strength was observed. The shelf‐life was found to be about 7 weeks and a strong agreement between analytical and mechanical data was observed.Highlights Analysis of prepreg aging under ambient and accelerated storage conditions. Measurement of prepreg auto‐cure advancement using IR, Raman and DSC techniques. Comprehensive assessment of effect of moisture and temperature on prepreg integrity and tackiness. Co‐relation of spectroscopic and calorimetric data with mechanical properties of laminates prepared from aged prepregs Estimation of prepreg shelf‐life on exposure to room temperature simulating conditions.

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“…By dispersing second‐phase materials, such as rubber elastomer, 21–23 thermoplastic resin, 24–26 nanoparticle, 27,28 etc., in the epoxy resin system for modification and toughening. Among them, nano‐filler modified epoxy resin has been a hot research topic in recent years, which can produce strong interface interaction with resin through considerable surface energy, improve the mechanical properties of epoxy resin, inhibit crack propagation, and improve the mechanical properties of epoxy resin matrix composite materials 29 . Mirsalehi S A 30 modified the epoxy resin by using multi‐walled carbon nanotubes (MWCNTs).…”

Section: Introductionmentioning

confidence: 99%

“…Among them, nano-filler modified epoxy resin has been a hot research topic in recent years, which can produce strong interface interaction with resin through considerable surface energy, improve the mechanical properties of epoxy resin, inhibit crack propagation, and improve the mechanical properties of epoxy resin matrix composite materials. 29 Mirsalehi S A 30 modified the epoxy resin by using multi-walled carbon nanotubes (MWCNTs). The results showed that adding 1 wt% of MWCNTs to epoxy resin increased the elastic modulus of the matrix by 41%.…”

mentioning

confidence: 99%

Mechanical properties of modified aramid three‐dimensional braided composites

Li,

Shi,

Xing

et al. 2023

Polymers for Advanced Techs

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Three‐dimensional (3D) braided composites have good integrity and high stability, but aramid fiber (AF) has an inert surface and poor interfacial bonding with resin, which affects the mechanical properties of aramid 3D braided composites and limits their development. This paper used catechol/pyrogallol polyamine (CA/PGPA) to modify the AF. The effects of different mass fraction ratios of CA/PGPA and different reaction temperatures on the surface properties of AF and the mechanical properties of 3D braided composites were investigated. The results showed that after the CA/PGPA modification, fiber surface oxygen‐containing groups increased, the roughness became more extensive, the fiber strength increased, and the interfacial shear strength increased. When AF‐CAPG‐II‐40°C, the mechanical properties of the 3D braided composites were improved most significantly. Compared with unmodified composites, the bending modulus was increased by 70%, the compression modulus by 124%, and the shear strength by 55.7%. The epoxy resin modification was carried out based on AF‐CAPG‐II‐40°C, and when the mass fraction of aramid nanofiber/graphene nanoparticle (ANF/G) was 0.7 wt%, 3D braided composites exhibited satisfactory mechanical properties. The bending modulus, compression modulus, and shear strength were increased by 15.3%, 23.3%, and 25.7%, respectively, compared with AF‐CAPG‐II‐40°C.

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Advances and outlook in modified graphene oxide (GO)/epoxy composites for mechanical applications

Cited by 10 publications

References 102 publications

In situ exfoliation and surface functionalization of graphene oxide for epoxy composites with improved thermal and mechanical properties

In situ exfoliation and surface functionalization of graphene oxide for epoxy composites with improved thermal and mechanical properties

Assessment of E‐glass/epoxy prepreg aging via analytical, physical and mechanical techniques

Mechanical properties of modified aramid three‐dimensional braided composites

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