Investigation on tribo-characteristics of Calotropis gigantea fiber-reinforced-CNT modified polymer composites

Dwivedi, Umesh Kumar; Singh, Shamsher; Shukla, Satish Chandra; Hashmi, S. A. R.

doi:10.1007/s00289-020-03532-6

Cited by 8 publications

(6 citation statements)

References 15 publications

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“…First of all, due to the special characteristics of the CNT structure, a carbon film is formed regardless of whether the CNT is attached to the polymer matrix or when it falls into the gap of the friction substrate due to wear. This hard and self-lubricating carbon film effectively avoids direct scraping of the friction substrate and reduces the COF and WR (Zhang et al, 2020;Dwivedi et al, 2022). In the next place, when the CNT/polymer composite is subjected to stress, it is transferred to the CNT through the bonding interface, making the CNT the main stressor.…”

Section: Cntsmentioning

confidence: 99%

Tribological properties of carbon nanotube/polymer composites:A mini-review

Miao

Chen²,

Li³

et al. 2023

Front. Mater.

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With the development of modern industry, the requirements for mechanical equipment are increasingly stringent, and increasing attention has been paid to reducing wear or lubrication in the movement of mechanical structural parts. Polymers are widely used in the field of mechanical structural parts due to their high processing performance and comprehensive performance. However, the relatively weak mechanical and tribological properties of polymers limit their further application in mechanical equipment lubrication. Incorporation of fillers is a common method to improve the friction properties of polymers. Among various fillers, carbon nanotubes (CNTs) are considered the ideal fillers to significantly improve the tribological properties of polymers. Therefore, this paper reviews the tribological properties of carbon nanotube modified polymer materials. The tribological wear mechanism of polymers and the influence of friction-reducing fillers on the tribological properties of polymers and the related lubrication mechanism explanation are outlined, and the factors influencing the tribological properties of composites by carbon nanotubes and the related lubrication mechanism explanation are analyzed. The presented review will be beneficial for the production of high-performance polymer nanocomposites.

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Section: Cntsmentioning

confidence: 99%

Tribological properties of carbon nanotube/polymer composites:A mini-review

Miao

Chen²,

Li³

et al. 2023

Front. Mater.

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“…We synthesized the GO by the Hummers method, which was reported in the previous work (Xu et al 2020;Dwivedi et al 2021). Briefly, graphite powders (2 g), NaNO 3 (2 g), and 50 mL of H 2 SO 4 (98%) were mixed in a 1000 mL volumetric flask and kept in an ice bath.…”

Section: Preparation Of Graphene Coated Cgysmentioning

confidence: 99%

A facile scalable conductive graphene-coated Calotropis gigantea yarn

et al. 2022

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Graphene-functionalized fibers have attracted substantial attention due to their potential applications in flexible wearable electronics. However, these conventional conductive materials face difficulties in mass production, which limits their large-scale fabrication. In this paper, we report a graphene-coated Calotropis gigantea yarn by pad dyeing with graphene oxide and a reduction process, which endows it with high conductivity, outstanding conducting stability, and scale production capacity. By optimizing the dyeing parameters, the modified yarns display a high electrical conductivity of 6.9 S/m. Range analysis results indicate that the electrical conductivity of the graphene-coated yarns exhibits a strong dependence on the concentration of graphene oxide and pad dyeing cycles. The hydrogen bonding between the fiber and graphene during the dyeing process renders the functionalized yarns stable conductivity to washing and bending. Based on the simple fabrication process and fascinating performance, the graphene-coated yarn show great potential in facile scale production of conductive yarns.

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“…Different weight percentages of CNT (0.25%, 0.5%, 1%, and 2%) were used to fabricate composites and the wear characteristics were improved by the addition of the filler material. 28…”

Section: Introductionmentioning

confidence: 99%

“…Different weight percentages of CNT (0.25%, 0.5%, 1%, and 2%) were used to fabricate composites and the wear characteristics were improved by the addition of the filler material. 28 In the current investigation, CGF was employed as reinforcement. The CGF has features that are comparable to those of other lignocellulose fibers like hemp, jute, and coir, hence the potential of CGF as a promising raw material for engineering applications is evident from the literature.…”

Section: Introductionmentioning

confidence: 99%

Calotropis gigantea stem fiber reinforced thermoset plastics: Interlaminar shear strength and related tribo-mechanical properties

KG¹,

GK²,

Kalaichelvan

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part L:

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This study examines the effects of lignite fly ash as a filler on the tribological and mechanical performance of a Calotropis gigantea fiber–epoxy composite. The investigation results show that the Calotropis gigantea fiber/epoxy composite with 2 wt.% lignite fly ash nanofiller added had better tensile strength, interlaminar shear, impact strength, and flexural strength than the control sample by 29.83%, 58.17%, 69.16%, and 11.41%, respectively. The manufactured composite samples were subjected to tribological tests, such as the friction coefficient and specific wear rate under dry sliding conditions with various process variables, such as sliding speed (1–3 m/s), functional load (10, 20, and 30 N), and sliding distance (1000 m). The results show that adding 3 wt.% nanofiller lignite fly ash to the Calotropis gigantea fiber/epoxy composites greatly improves the specific wear rate and friction coefficient. Additionally, the performance of the Calotropis gigantea fiber/epoxy composites in absorbing moisture was enhanced by the inclusion of the nanofiller lignite fly ash 2 wt.%. Likewise, the composite sample developed with the ideal nanofiller lignite fly ash with Calotropis gigantea fiber may be used for sustainable brake materials owing to its superior mechanical and tribological qualities.

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Investigation on tribo-characteristics of Calotropis gigantea fiber-reinforced-CNT modified polymer composites

Cited by 8 publications

References 15 publications

Tribological properties of carbon nanotube/polymer composites:A mini-review

Tribological properties of carbon nanotube/polymer composites:A mini-review

A facile scalable conductive graphene-coated Calotropis gigantea yarn

Calotropis gigantea stem fiber reinforced thermoset plastics: Interlaminar shear strength and related tribo-mechanical properties

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