Exploiting the synergetic effects of graphene and carbon nanotubes on the mechanical properties of bitumen composites

Yang, Qilin; Yue, Qian; Fan, Zepeng; Lin, Jia; Wang, Dawei; Zhong, Jing; Oeser, Markus

doi:10.1016/j.carbon.2020.10.020

Cited by 71 publications

(20 citation statements)

References 44 publications

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“…When stacked, few-layer or multilayer graphene (MLG) is formed [ 29 ]; when randomly stacked, different grades of carbon black (CB) are formed [ 30 ]; and when wrapped, single- or multilayer carbon nanotubes result ( Scheme 1 ). However, the nanofillers tend to aggregate at high contents owing to intermolecular Van der Waals interactions [ 31 ] among the single or hybrid filler particles [ 32 ], resulting in poorer properties [ 33 ]. Thus, the nanofiller must be optimized in order to obtain the best mechanical and electrical properties.…”

Section: Introductionmentioning

confidence: 99%

Silicone Rubber Composites Reinforced by Carbon Nanofillers and Their Hybrids for Various Applications: A Review

et al. 2021

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Without fillers, rubber types such as silicone rubber exhibit poor mechanical, thermal, and electrical properties. Carbon black (CB) is traditionally used as a filler in the rubber matrix to improve its properties, but a high content (nearly 60 per hundred parts of rubber (phr)) is required. However, this high content of CB often alters the viscoelastic properties of the rubber composite. Thus, nowadays, nanofillers such as graphene (GE) and carbon nanotubes (CNTs) are used, which provide significant improvements to the properties of composites at as low as 2–3 phr. Nanofillers are classified as those fillers consisting of at least one dimension below 100 nanometers (nm). In the present review paper, nanofillers based on carbon nanomaterials such as GE, CNT, and CB are explored in terms of how they improve the properties of rubber composites. These nanofillers can significantly improve the properties of silicone rubber (SR) nanocomposites and have been useful for a wide range of applications, such as strain sensing. Therefore, carbon-nanofiller-reinforced SRs are reviewed here, along with advancements in this research area. The microstructures, defect densities, and crystal structures of different carbon nanofillers for SR nanocomposites are characterized, and their processing and dispersion are described. The dispersion of the rubber composites was reported through atomic force microscopy (AFM), transmission electron microscopy (TEM), and scanning electron microscopy (SEM). The effect of these nanofillers on the mechanical (compressive modulus, tensile strength, fracture strain, Young’s modulus, glass transition), thermal (thermal conductivity), and electrical properties (electrical conductivity) of SR nanocomposites is also discussed. Finally, the application of the improved SR nanocomposites as strain sensors according to their filler structure and concentration is discussed. This detailed review clearly shows the dependency of SR nanocomposite properties on the characteristics of the carbon nanofillers.

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Section: Introductionmentioning

confidence: 99%

Silicone Rubber Composites Reinforced by Carbon Nanofillers and Their Hybrids for Various Applications: A Review

et al. 2021

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“…In this paper, the 0.6 wt % WMCNTs seems to be the optimum content, which is similar to the research results of Aghamohammadi et al 20 (0.5 wt% WMCNTs). Due to the strong van der Waals force, the agglomeration phenomenon of single component GO or MWCNTs was more obvious 32 . However, a formation of one‐dimensional hybrid structure would inhibit each other and avoid the agglomeration when the two components were mixed 33 .…”

Section: Resultsmentioning

confidence: 99%

“…Tarfaoui et al 27 found that 4% carbon nanotubes would degrade the mechanical performance of the composites. Some scholars have found that there is a synergistic effect between the graphene and WMCNTs, which has a more significant effect for improving the mechanical behavior of composites 28–32 . The agglomeration phenomena of multi‐layer graphene platelets (MGPs) was inhibited by MWCNTs, because MWCNTs can bridge adjacent MGPs 28 .…”

Section: Introductionmentioning

confidence: 99%

Experimental study of the effect of GO/WMCNTs on the mechanical properties and impact response of magnesium‐based fiber metal laminates

Deng

Wei

et al. 2021

Polymer Composites

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In order to investigate the effect of graphene oxide (GO)/multi wall carbon nanotubes (WMCNTs) on the mechanical properties and low‐velocity impact response of magnesium‐based fiber metal laminates (FMLs), the FMLs specimens reinforced with GO, WMCNTs or their mixture were prepared, and quasi‐static tensile and low‐velocity drop hammer impact tests were performed. The tensile test results showed that the mechanical performance of FMLs could be improved by adding a certain concentration of nanoparticles. The tensile strength increased by 14.9% and 26.6% when the concentration of GO or WMCNTs is 0.6 wt%, respectively. Due to the agglomeration phenomenon, there are the opposite effect for the tensile strength of FMLs when the particle concentration is excessive. After the mixture of GO and WMCNTs was added to the epoxy matrix, the tensile strength of FMLs could still be increased by 12.8% at the GO to WMCNTs ratio of 0.6:0.9 (the overall concentration of particle is 1.5 wt%). And the elastic modulus is also significantly increased, but it has a negative effect on the ductility. The low‐velocity impact test results showed that the FMLs reinforced a mixture of GO and WMCNTs have greater peak impact load due to the lager stiffness. The FMLs reinforced with WMCNTs have better energy absorption capacity under impact load due to lager damage area.

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“…In recent years, the development of composites sheds new insight on the strain detection of pavement (Li et al, 2004;Gao et al, 2009;Hu et al, 2010;Eswaraiah et al, 2012;Xi and Chung, 2020). With the remarkable self-sensing and special functional ability, composite smart materials are responsive to the effect of deformation, force, or other factors (Xi and Chung, 2020;Yang et al, 2021). Application of self-sensing composites in the field of civil engineering can mainly be divided into two categories based on the matrix materials, one is the common civil engineering materials of cement or asphalt and the other is polymer (Thostenson and Chou, 2006;Wang et al, 2015;Can-Ortiz et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

The Innovative Self-Sensing Strain Sensor for Asphalt Pavement Structure: Substitutability and Synergy Effects of Graphene Platelets With Carbon Nanotubes in Epoxy Composites

Xue

Luan

et al. 2022

Front. Mater.

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Situ sensors with high accuracy, long durability, and high survival rate are crucial for the health monitoring of asphalt pavement. Due to the harsh environment during the construction period and service life, the monitoring components which can be buried synchronously with the construction period of the road surface become a difficult problem to be solved urgently. The development of functional composites sheds a new insight for pavement strain detection with remarkable self-sensing behavior. In this paper, the substitutability and synergy effect of graphene platelets with carbon nanotubes (CNTs), the effect of CNT types with different specific surface areas in epoxy composites to the morphological, electrical, and mechanical properties, and the strain-electrical resistance response peculiarity of composites were evaluated. The performance of developed composite sensors with epoxy encapsulation was investigated through laboratory experiments. The morphologies showed that CNT-GNP hybrids in composites present a better dispersion state because of the size effect and synergetic effect whereas the pure CNTs are prone to entangle with each other. Composites with CNT(SSA500) display the most amounts of conductive units in same dosage. CNTs and GNP can strengthen the elastic modulus of the epoxy matrix to basically the same as that of asphalt mixture within the range of 1100–1500 MPa. At last, Laboratory experiments have proved the promising prospect for CNTs-GNP/epoxy composites serving as the strain sensor. The developed composites-based strain sensor can provide a new prospect for asphalt pavement monitoring.

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Exploiting the synergetic effects of graphene and carbon nanotubes on the mechanical properties of bitumen composites

Cited by 71 publications

References 44 publications

Silicone Rubber Composites Reinforced by Carbon Nanofillers and Their Hybrids for Various Applications: A Review

Silicone Rubber Composites Reinforced by Carbon Nanofillers and Their Hybrids for Various Applications: A Review

Experimental study of the effect of GO/WMCNTs on the mechanical properties and impact response of magnesium‐based fiber metal laminates

The Innovative Self-Sensing Strain Sensor for Asphalt Pavement Structure: Substitutability and Synergy Effects of Graphene Platelets With Carbon Nanotubes in Epoxy Composites

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