Superelastic Hard Carbon Nanofiber Aerogels

Yu, Zhi‐Long; Qin, Bing; Ma, Zhiyuan; Huang, Jin; Li, Sicheng; Zhao, Hongbin; Li, Han; Zhu, YinBo; Wu, Huan; Yu, Shu‐Hong

doi:10.1002/adma.201900651

Cited by 160 publications

(96 citation statements)

References 43 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…After 95% cyclic compression for ten cycles, the maximum pressure and Young's modulus of 3D BHGM remained at 90.1% and 73.3% of the initial value, and irreversible deformation is only 0.9% (Figure S11, Supporting Information). Figure i shows the Young's modulus of 3D‐printed BHGMs is more than three times higher than the traditional superelastic bulk graphene materials . In addition, the resilience and stability of our ultralight BHGMs are also remarkably better than the previously reported 3D‐printed graphene materials (Table S1, Supporting Information) …”

mentioning

confidence: 73%

See 1 more Smart Citation

3D Printing of Ultralight Biomimetic Hierarchical Graphene Materials with Exceptional Stiffness and Resilience

et al. 2019

View full text Add to dashboard Cite

Assembly of lightweight engineering and functional materials with superb mechanical performance, such as high stiffness, super resilience, and stability, is highly demanded to pave ways for their practical applications. [1] However, how to simultaneously achieve both stiffness and resilience in a man-made material at low-density remains a challenging scientific and engineering issue. Biological materials have found their way to achieve outstanding mechanical properties at low density by assembling sophisticate hierarchical structures from microscopic to macroscopic scales, and thus provide inspirations for designing and manufacturing advanced biomimetic materials. [2] Plant materials, such as plant stem [3] and wood, [4] represent an important class of lightweight natural materials with superb mechanical properties. The slender grass stems of Elytrigia repens is a representative natural material with high mechanical performance and lightweight features owing to a specially evolved hierarchical architecture with a macroscopically hollow and microscopically cellular structure. The macroscopically hollow structure combined with the cellular microstructure serves as an excellent force-bearing structure that is conducive to the dispersion of strain and stress, and thus efficiently enhances the stiffness, and resilience and reduce the density, simultaneously. [5] In recent years, the constructions of biomimetic structures have attracted extensive attention because of their potential ability to achieve high mechanical properties and lightweight artificial engineering and functional materials. [6] Despite progresses in the construction of biomimetic structures, the poor mechanical properties at low density remain as a major bottleneck in artificial biomimetic materials, which are mainly due to the lack of appropriate structures at both macro-and microlevels at the same time.The ink-based 3D printing, as a powerful additive manufacturing technique for producing 3D structures both in microscopic and macroscopic scales, [6b,7] shows great potential to assembly materials into 3D hierarchical structures. Additionally, 3D printing displays distinct advantages of high degree of freedom in structure design, which enable the ability to design and construct versatile structures for realizing the Biological materials with hierarchical architectures (e.g., a macroscopic hollow structure and a microscopic cellular structure) offer unique inspiration for designing and manufacturing advanced biomimetic materials with outstanding mechanical performance and low density. Most conventional biomimetic materials only benefit from bioinspired architecture at a single length scale (e.g., microscopic material structure), which largely limits the mechanical performance of the resulting materials. There exists great potential to maxime the mechanical performance of biomimetic materials by leveraging a bioinspired hierarchical structure. An ink-based three-dimensional (3D) printing strategy to manufacture an ultralight biomimetic hierarchical g...

show abstract

mentioning

confidence: 73%

“…The density of 3D HGM and 3D BHGM is 8.7 and 8.5 mg cm −3 , respectively. i) Young's modulus of 3D‐printed BHGMs show threefold higher than the conventional bulk superelastic materials with comparable geometric density …”

mentioning

confidence: 99%

3D Printing of Ultralight Biomimetic Hierarchical Graphene Materials with Exceptional Stiffness and Resilience

et al. 2019

View full text Add to dashboard Cite

show abstract

“…The ultrastability of the GA array sensor enables the reliability of massive data ( fig. S26), setting the basis for reliable AI tactile finger (30)(31)(32) and carbon aerogels (12,33,34), in the merits of GF and strain range. (E) Mechanical control of the robotic hand with the GA sensor to identify the density of ultralight carbon aerogel (ULCA).…”

Section: Ai Microarray Sensor Of Gasmentioning

confidence: 99%

Hydroplastic foaming of graphene aerogels and artificially intelligent tactile sensors

et al. 2020

View full text Add to dashboard Cite

Direct foaming from solids is the most efficient method to fabricate porous materials. However, the ideal foaming fails to prepare aerogel of nanoparticles because the plasticity of their solids is denied by the overwhelming interface interactions. Here, we invent a hydroplastic foaming method to directly convert graphene oxide solids into aerogel bulks and microarrays, replacing the prevalent freezing method. The water intercalation plasticizes graphene oxide solids and enables direct foaming instead of catastrophic fragmentation. The bubble formation follows a general crystallization rule and allows nanometer-precision control of cellular wall thickness down to 8 nm. Bubble clustering generates hyperboloid structures with seamless basal connection and renders graphene aerogels with ultrarobust mechanical stability against extreme deformations. We exploit graphene aerogel to fabricate tactile microarray sensors with ultrasensitivity and ultrastability, achieving a high accuracy (80%) in artificially intelligent touch identification that outperforms human fingers (30%).

show abstract

“…e) The loss of elasticity of the isobutylene isoprene rubber after frozen in LN 2 for comparison. als, [30,[37][38][39] for example,g raphene,c arbon nanotubes,h ave recently been reported to show elasticity in LN 2 .H owever, purely organic materials (including polymers) that display elasticity at such extreme circumstances are not known. It is amazing for the high-density materials formed with organic small molecules,e specially those in the highly crystalline state,toshow elasticity at ultra-low temperatures.Properties of the crystal at high temperatures have also been tested.…”

Section: Introductionmentioning

confidence: 99%

An Organic Crystal with High Elasticity at an Ultra‐Low Temperature (77 K) and Shapeability at High Temperatures

Liu

Zhang

et al. 2019

Angew Chem Int Ed

View full text Add to dashboard Cite

Organic single crystals with elastic bending capability and potential applications in flexible devices and sensors have been elucidated. Exploring the temperature compatibility of elasticity is essential for defining application boundaries of elastic materials. However, related studies have rarely been reported for elastic organic crystals. Now, an organic crystal displays elasticity even in liquid nitrogen (77 K). The elasticity can be maintained below ca. 150 °C. At higher temperatures, the heat setting property enables us to make various shapes of crystalline fibers based on this single kind of crystal. Through detailed crystallographic analyses and contrast experiments, the mechanisms behind the unusual low‐temperature elasticity and high‐temperature heat setting are disclosed.

show abstract

Superelastic Hard Carbon Nanofiber Aerogels

Cited by 160 publications

References 43 publications

3D Printing of Ultralight Biomimetic Hierarchical Graphene Materials with Exceptional Stiffness and Resilience

3D Printing of Ultralight Biomimetic Hierarchical Graphene Materials with Exceptional Stiffness and Resilience

Hydroplastic foaming of graphene aerogels and artificially intelligent tactile sensors

An Organic Crystal with High Elasticity at an Ultra‐Low Temperature (77 K) and Shapeability at High Temperatures

Contact Info

Product

Resources

About