Improvement of Fracture Toughness in Epoxy Nanocomposites through Chemical Hybridization of Carbon Nanotubes and Alumina

Zakaria, Muhammad Razlan; Kudus, Muhammad Helmi Abdul; Akil, Hazizan Md; Zamri, Mohd Hafiz

doi:10.3390/ma10030301

Cited by 23 publications

(17 citation statements)

References 22 publications

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“…Generally, the main potential of graphene and carbon nanotubes as a structural element in epoxy nanocomposites are known for their ability to improve fracture toughness. As mention earlier, previous studies have reported that the incorporation of graphene and carbon nanotubes into epoxy matrix could lead to the enhancement of fracture toughness . In this study, the three‐point bend specimen of neat epoxy, Epoxy/SLG and Epoxy/SWCNT were used to determine mode 1 fracture toughness, K 1C .…”

Section: Resultssupporting

confidence: 55%

Comparative study of single‐layer graphene and single‐walled carbon nanotube‐filled epoxy nanocomposites based on mechanical and thermal properties

et al. 2018

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Single layer graphene (SLG) and single‐walled carbon nanotube (SWCNT) were chosen as a candidate to reinforce epoxy resin due to their extraordinary intrinsic properties. In this paper, the comparison of SLG and SWCNT on epoxy nanocomposites has been investigated based on their mechanical and thermal properties. First, the SLG and SWCNT were characterized by extreme high‐resolution field emission scanning electron microscope, high‐resolution transmission electron microscope, Raman spectroscopy, and Fourier transform infrared spectroscopy. The mechanical and thermal properties of both epoxy nanocomposites were investigated at different weight percentages of filler loading (i.e., 0.1–0.5%). The results indicated that the SWCNT‐filled epoxy nanocomposites have higher mechanical properties, but slightly lower thermal properties as compared with the SLG filled epoxy nanocomposites. The tensile strength, fracture toughness and thermal conductivity of the SLG filled epoxy nanocomposites improved up to 7, 14, and 35%, respectively, and the SWCNT filled epoxy nanocomposites improved up to 10, 21, and 26%, respectively. POLYM. COMPOS., 40:E1840–E1849, 2019. © 2018 Society of Plastics Engineers

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Section: Resultssupporting

confidence: 55%

Comparative study of single‐layer graphene and single‐walled carbon nanotube‐filled epoxy nanocomposites based on mechanical and thermal properties

et al. 2018

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“…In addition, river lines are also present in such kind of material, as seen in Fig. . Most of the river lines had an inclination related to the crack propagation direction (white arrow in Fig.…”

Section: Toughening Mechanismsmentioning

confidence: 96%

Toughness and roughness in hybrid nanocomposites of an epoxy matrix

Coelho

2019

Polymer Engineering & Sci

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The present paper investigates the relationship between roughness and toughening mechanisms in hybrid epoxy nanocomposites with carbon nanotubes (CNT) and graphene nanoplatelets (GNPs). The role of adding a block copolymer (BC) to the studied systems was also investigated. The nanocomposites were prepared by means of high-energy sonication and in situ polymerization. All nanocomposites presented higher numerical values for K Ic than untoughened systems. The system containing 0.5 wt% of CNTs presented an increase of 35% in K Ic compared to neat epoxy, and the hybrid nanocomposite, at the proportion of 1:1 (CNT:GNP), with 0.5 wt% total of nanoparticles and also containing 0.5 wt % of BC, had an increase of 34% compared to the neat epoxy. Systems with higher amounts of graphene showed the highest roughness values, having crack deflection/exfoliation between the GNP layers as the main toughening mechanism. On the other hand, systems with more CNTs presented a lower fracture surface roughness, and the main toughening mechanism was bridging/break-up of the nanotubes. Hybrid systems have more types of mechanisms than simple ones. With only one type of nanoparticle, however, some of those mechanisms are not effective in increasing the toughness, only increasing the fracture surface roughness. POLYM. ENG.

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“…For the 50 and 500 nm size particles, the static fracture toughness is higher than dynamic and interestingly the dynamic fracture toughness reduces with increase in volume fraction. Zakaria et al synthesized CNT–Al2O3 hybrid compounds by growing CNTs on the Al2O3 particles via CVD and then analyzed the improvement in toughness by incorporating these materials into the epoxy matrix. They also compared the properties of these hybrid composites with the composites prepared by mixing nano alumina and CNT particles in the epoxy matrix.…”

Section: Nanofiller Toughened Epoxy Compositesmentioning

confidence: 99%

Innovative materials of this era for toughening the epoxy matrix: A review

2018

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This review aims to bring to light the potential efficiency of various materials as toughening agents for epoxy thermosets. The area of epoxy toughening has fascinated material scientists since toughened epoxies are employed as the appropriate candidates in a wide arena of applications. Based on the structure–property relationships, the traditional chemistry approaches have been tried so far to toughen the epoxy matrix. With the advent of the era of nanotechnology, the field of epoxy toughening has also gained momentum through the utilization of various types of modified and unmodified nanofillers in the epoxy matrix. In fact many new materials have replaced the conventional agents in the field of epoxy toughening. We are giving a comprehensive review which hints the various mechanisms of toughening as well as the novel materials used in the present scenario as potential toughening agents in the epoxy matrix with special reference to rubber, block copolymers, and nanofillers. POLYM. COMPOS., 39:E1959–E1986, 2018. © 2018 Society of Plastics Engineers

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Improvement of Fracture Toughness in Epoxy Nanocomposites through Chemical Hybridization of Carbon Nanotubes and Alumina

Cited by 23 publications

References 22 publications

Comparative study of single‐layer graphene and single‐walled carbon nanotube‐filled epoxy nanocomposites based on mechanical and thermal properties

Comparative study of single‐layer graphene and single‐walled carbon nanotube‐filled epoxy nanocomposites based on mechanical and thermal properties

Toughness and roughness in hybrid nanocomposites of an epoxy matrix

Innovative materials of this era for toughening the epoxy matrix: A review

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