Modifying carbon nanotube fibers: A study relating apparent interfacial shear strength and failure mode

Kim, Jae-Woo; Sauti, Godfrey; Jensen, Benjamin D.; Smith, Joseph G.; Wise, Kristopher E.; Wincheski, Russell A.; Cano, Roberto J.; Siochi, Emilie J.

doi:10.1016/j.carbon.2020.11.055

Cited by 23 publications

(22 citation statements)

References 42 publications

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“…The need for lightweight ultra-strong structural materials is increasingly being recognized for the next generation of space vehicles for deep-space human travel. To fulfill this need, significant focus has been placed on carbon nanotube (CNT) based composites materials [1][2][3][4]. These materials have the potential to exhibit superior thermo-mechanical properties relative to the current state-of-the-art composites [5,6].…”

Section: Introductionmentioning

confidence: 99%

“…The need for lightweight ultrastrong structural materials is increasingly being recognized for the next generation of space vehicles for deep-space human travel. To fulfill this need, significant focus has been placed on carbon nanotube (CNT)-based composite materials. − These materials have the potential to exhibit superior thermomechanical properties relative to the current state-of-the-art composites. , Thus far, a major shortcoming of these materials is their failure to translate these outstanding properties to higher length scales. Therefore, it is necessary to investigate and mitigate the failure of the CNT/matrix interfacial region to fully utilize the benefits of these materials.…”

Section: Introductionmentioning

confidence: 99%

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Prediction of the Interfacial Properties of High-Performance Polymers and Flattened CNT-Reinforced Composites Using Molecular Dynamics

et al. 2021

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Prediction of the Interfacial Properties of High-Performance Polymers and Flattened CNT-Reinforced Composites Using Molecular Dynamics

et al. 2021

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“…Current research has shown that fibers content has a certain degree of influence on polymer properties, too much or too little cannot achieve the expected effect or the effect is not obvious. [29][30][31][32] Generally speaking, the proportion of fibers added to the composites will not exceed 40% of its total mass fraction, and ≈15-20% of the fiber amount will have an obvious effect. [33][34][35] Therefore, this experiment set up three different concentrations of composites, one group was blank control, the other two groups contained 15% and 30% PVA fibers, respectively.…”

Section: Fabrication and Processing Of Experimental Materialsmentioning

confidence: 99%

A Novel Finding of Tribological and Mechanical Linking to Micro‐Convex Texture on Hydrophilic Composites Surface under Water‐Lubricating Conditions

Liang

Guo

et al. 2021

Macro Materials & Eng

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The existence of micro‐structures endows the materials with some novel characteristics. In this study, the hot‐spot material thermoplastic polyurethane (TPU) is used as the experimental object, and the water‐lubricating composites are prepared by introducing well‐hydrophilic polyvinyl alcohol (PVA) fibers, which can spontaneously and continuously produce micro‐convex textures in water. By observing and analyzing the internal structures, physical and chemical properties, coefficient of friction, wear surface, wear loss, etc. of the materials, the relationship between the micro‐convex structures on the material surface and its tribological properties is studied. The experimental results show that the existence of micro‐convex structures can make the material show better wear resistance during the friction process, and they will not disappear completely with the process. The most obvious effect is the sample containing 15% PVA fibers and with soaking and polishing treatments, its coefficient of friction is 0.11, which is 74.42% lower than that of the pure sample without any treatments, the main reason is due to the hydrodynamic lubrication effect and cavitation effect of the micro‐convex structures. For the wear mechanism, pure samples are adhesive wear, and modified samples are mainly abrasive wear. This work will provide new design ideas for tribology in the micro‐nano field.

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“… 1 − 3 While one challenge with CNT reinforcement in composites is the difficulty in achieving sufficient levels of CNT/matrix interfacial load transfer, 4 − 6 a bigger challenge is the load transfer mechanisms within CNT fibers that limit composite properties. 7 …”

Section: Introductionmentioning

confidence: 99%

Molecular Dynamics Modeling of Interfacial Interactions between Flattened Carbon Nanotubes and Amorphous Carbon: Implications for Ultra-Lightweight Composites

Gaikwad

Kowalik

Jensen

et al. 2022

ACS Appl. Nano Mater.

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Flattened carbon nanotubes (flCNTs) naturally form in many carbon nanotube-based materials and can exhibit mechanical properties similar to round carbon nanotubes but with tighter packing and alignment. To facilitate the design, fabrication, and testing of flCNT-based composites for aerospace structures, computational modeling can be used to efficiently and accurately predict their performance as a function of processing parameters, such as reinforcement/matrix cross-linking. In this study, molecular dynamics modeling is used to predict the load transfer characteristics of the interface region between the flat region of flCNTs (i.e., bi-layer graphene) and amorphous carbon (AC) with various levels and locations of covalent bond cross-linking and AC mass density. The results of this study show that increasing the mass density of AC at the interface improves the load transfer capability of the interface. However, a much larger improvement is observed when cross-linking is added both to the flCNT–AC interface and between the flCNT sheets. With both types of cross-linking, substantial improvements in interfacial shear strength, transverse tension strength, and transverse tension toughness are predicted. The results of this study are important for optimizing the processing of flCNT/AC composites for demanding engineering applications.

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Modifying carbon nanotube fibers: A study relating apparent interfacial shear strength and failure mode

Cited by 23 publications

References 42 publications

Prediction of the Interfacial Properties of High-Performance Polymers and Flattened CNT-Reinforced Composites Using Molecular Dynamics

Prediction of the Interfacial Properties of High-Performance Polymers and Flattened CNT-Reinforced Composites Using Molecular Dynamics

A Novel Finding of Tribological and Mechanical Linking to Micro‐Convex Texture on Hydrophilic Composites Surface under Water‐Lubricating Conditions

Molecular Dynamics Modeling of Interfacial Interactions between Flattened Carbon Nanotubes and Amorphous Carbon: Implications for Ultra-Lightweight Composites

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