In-Situ Welding Carbon Nanotubes into a Porous Solid with Super-High Compressive Strength and Fatigue Resistance

Lin, Zhiqiang; Gui, Xuchun; Gan, Qiming; Cheng, Xiaoping; Liu, Ming; Zhu, Yuan; Yang, Yanbing; Cao, Anyuan; Tang, Zikang

doi:10.1038/srep11336

Cited by 41 publications

(45 citation statements)

References 57 publications

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“…[ 5 ] Other researchers have found similar experimental results, where they correlate the transition from ductile to brittle material behavior to the increase in density. [ 18 ] In other words, for thick coatings we observe material failure in the form of fracture while for thin coatings we see failure due to the collective buckling of many CNTs. Figure 8 c,d shows the modulus as a function of the applied strain.…”

Section: Compressive Strength and Elastic Modulusmentioning

confidence: 97%

Effects of Nanostructure and Coating on the Mechanics of Carbon Nanotube Arrays

Poelma

Fan

et al. 2016

Adv Funct Materials

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Nanoscale materials are one of the few engineering materials that can be grown from the bottom up in a controlled manner. Here, the effects of nanostructure and nanoscale conformal coating on the mechanical behavior of vertically aligned carbon nanotube (CNT) arrays through experiments and simulation are systematically investigated. A modeling approach is developed and used to quantify the compressive strength and modulus of the CNT array under large deformation. The model accounts for the porous nanostructure, which contains multiple CNTs with random waviness, van der Waals interactions, fracture strain, contacts, and frictional forces. CNT array micropillars are grown and their porous nanostructure is controlled by the infiltration and deposition of thin conformal coatings using chemical vapor deposition. Flat‐punch nanoindentation experiments reveal significant changes in material properties as a function of coating thickness. The simulations explain the experimental results and show the novel failure transition regime that changes from collective CNT buckling toward structural collapse due to fracture. The compressive strength and the elastic modulus increase exponentially as a function of the coating thickness and demonstrate a unique dependency on the CNT waviness. More interestingly, a design rule is identified that predicts the optimum coating thickness for porous materials.

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Section: Compressive Strength and Elastic Modulusmentioning

confidence: 97%

Effects of Nanostructure and Coating on the Mechanics of Carbon Nanotube Arrays

Poelma

Fan

et al. 2016

Adv Funct Materials

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“…[ 106,107 ] Deposition of AC into the sponge resulted in a . [ 106,107 ] Deposition of AC into the sponge resulted in a .…”

Section: Cnt Sponge-based Hierarchical or Hybrid Compositesmentioning

confidence: 99%

“…TEM images showed a mass of graphene stacking at the nodes between nanotubes, and about 25-40% of the CNT surfaces were coated (Figure 5 b,c). [107] Copyright 2014, Wiley-VCH. As we know, unzipping a CNT along its axis results in the formation of a graphene nanoribbon (GNR).…”

Section: Cnt Sponge-based Hierarchical or Hybrid Compositesmentioning

confidence: 99%

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Carbon Nanotube Sponges, Aerogels, and Hierarchical Composites: Synthesis, Properties, and Energy Applications

Lin

Zeng

Gui

et al. 2016

Advanced Energy Materials

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200

105

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Carbon nanotube (CNT) aerogels and sponges are macroscopic porous materials with a unique isotropic structure. CNTs make an interconnected 3D scaffold, therefore the resulting aerogels are robust, highly conductive, and flexible, enabling a much broader range of applications than aligned arrays and thin films, especially in energy and environmental areas. A comprehensive overview of the recent progress in isotropic CNT‐based macroscopic structures is provided, including their synthesis methods, structural characteristics, mechanical properties, and deformation mechanism, as well as potential applications in energy and environmental fields. In particular, this study focuses on the CNT sponges developed, which are high‐performance porous materials with many distinct properties such as their versatile deformations and shape recovery. Importantly, the CNT sponges provide a universal platform for designing and manufacturing a variety of hierarchical functional composites by introducing polymers or inorganic guests, thus greatly extend application areas from highly compressible electrodes for supercapacitors and batteries, catalysis, to environmental cleanup. Future research directions and associated challenges in this field are proposed.

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“…Regardless, this work provided the first evidence of the enhanced properties that could be realized in a CNT aerogel and led to many more notable works. 16,39,40 To produce CNT aerogels with both the desired mechanical and electrical properties, some researchers sought to mechanically reinforce the CNTs with a conductive binder instead of the traditional polymer binder. The RF sol-gel route is a natural choice for such an 41 a small concentration of the surfactant-dispersed CNTs was added to the traditional RF solution before gelation, aiming to achieve a homogenous dispersion of CNTs within the aerogel framework.…”

Section: B Cnt Aerogelmentioning

confidence: 99%

Carbon aerogel evolution: Allotrope, graphene-inspired, and 3D-printed aerogels

et al. 2017

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Carbon aerogels (CAs) are a unique class of high surface area materials derived by sol-gel chemistry. Their high mass-specific surface area and electrical conductivity, environmental compatibility, and chemical inertness make them very promising materials for many applications, such as energy storage, catalysis, sorbents, and desalination. Since the first CAs were made via pyrolysis of resorcinol-formaldehyde (RF)-based organic aerogels in the late 1980s, the field has really grown. Recently, in addition to RF-derived amorphous CAs, several other carbon allotropes have been realized in aerogel form: carbon nanotubes (CNTs), graphene, graphite, and diamond. Furthermore, the popularity of graphene aerogels has inspired research into aerogels made of a host of graphene analog materials (e.g., boron nitride, transition metal dichalcogenides, etc.), with potential for an even wider array of applications. Finally, the development of threedimensional-printed aerogels provides the potential for CAs to have an even broader impact on energy-related technologies. Here, we will present recent work covering the novel synthesis of

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In-Situ Welding Carbon Nanotubes into a Porous Solid with Super-High Compressive Strength and Fatigue Resistance

Cited by 41 publications

References 57 publications

Effects of Nanostructure and Coating on the Mechanics of Carbon Nanotube Arrays

Effects of Nanostructure and Coating on the Mechanics of Carbon Nanotube Arrays

Carbon Nanotube Sponges, Aerogels, and Hierarchical Composites: Synthesis, Properties, and Energy Applications

Carbon aerogel evolution: Allotrope, graphene-inspired, and 3D-printed aerogels

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