Negative-Poisson-Ratio polyimide aerogel fabricated by tridirectional freezing for High- and Low-Temperature and Impact-Resistant applications

Yuan, Ruxun; Zhou, Yu; Fan, Xiaoliang; Lu, Qinghua

doi:10.1016/j.cej.2021.134404

Cited by 16 publications

(6 citation statements)

References 30 publications

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“…The elastic ceramic aerogels with a hyperbolic architecture show negative Poisson’s ratios during compression 4 . Compressible polyimide aerogels with negative Poisson’s ratios can be achieved by directional and tridirectional freezing strategies 35 , 36 . Graphene aerogels with Poisson’s ratios in the range of −0.95–1.64 during compression can be obtained by constructing meta-structures via laser engraving 8 .…”

Section: Introductionmentioning

confidence: 99%

Stretchable and negative-Poisson-ratio porous metamaterials

Zhang,

Sun,

Liang

et al. 2024

Nat Commun

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Highly stretchable porous materials are promising for flexible electronics but their fabrication is a great challenge. Herein, several kinds of highly stretchable conductive porous elastomers with low or negative Poisson’s ratios are achieved by uniaxial, biaxial, and triaxial hot-pressing strategies. The reduced graphene oxide/polymer nanocomposite elastomers with folded porous structures obtained by uniaxial hot pressing exhibit high stretchability up to 1200% strain. Furthermore, the meta-elastomers with reentrant porous structures combining high biaxial (or triaxial) stretchability and negative Poisson’s ratios are achieved by biaxial (or triaxial) hot pressing. The resulting elastomer-based wearable strain sensors exhibit an ultrawide response range (0-1200%). The materials can be applied for smart thermal management and electromagnetic interference shielding, which are achieved by regulating the porous microstructures via stretching. This work provides a versatile strategy to highly stretchable and negative-Poisson-ratio porous materials with promising features for various applications such as flexible electronics, thermal management, electromagnetic shielding, and energy storage.

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Section: Introductionmentioning

confidence: 99%

Stretchable and negative-Poisson-ratio porous metamaterials

Zhang,

Sun,

Liang

et al. 2024

Nat Commun

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“…Based on water-soluble PI precursors, the technique of freeze-casting is also widely used to fabricate PIA, 9,10 and various nanomaterials such as MXene, 11 graphene, 12 and nanofibers 13 were introduced to prepare flexible aerogel composites. Nevertheless, elaborately directional freezing methods are mainly applied for anisotropic structural design to obtain high-performance properties, 13–16 and the annealing afterwards would cause significant shrinkage up to 40%. 13,17,18…”

Section: Introductionmentioning

confidence: 99%

Flexible and interlocked quartz fibre reinforced dual polyimide network for high-temperature thermal protection

et al. 2023

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“…Poisson's ratio (PR) is defined as the ratio of the transversal strain to the strain along the applied stress direction when the material is deformed elastically [3]. Generally, PR, by definition, is positive for most commonly available engineering materials when the applied strain and the resultant transverse strain have opposite signs [4]. NPR materials refer to the phenomenon of lateral expansion when subjected to uniaxial tensile stress [5].…”

Section: Introductionmentioning

confidence: 99%

Single-Layer MoS2: A Two-Dimensional Material with Negative Poisson’s Ratio

et al. 2023

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Negative Poisson’s ratio (NPR) materials have broad applications such as heat dissipation, vibration damping, and energy absorption because of their designability, lightweight quality, and high strength ratio. Here, we use first-principles calculations to find a two-dimensional (2D) auxetic material (space group Rm), which exhibits a maximum in-plane NPR of −0.0846 and a relatively low Young’s modulus in the planar directions. Calculations show that the NPR is mainly related to its unique zigzag structure and the strong interaction between the 4d orbital of Mo and the 3p orbital of S. In addition, molecular dynamics (MD) simulations show that the structure of this material is thermodynamically stable. Our study reveals that this layered MoS2 can be a promising 2D NPR material for nanodevice applications.

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Negative-Poisson-Ratio polyimide aerogel fabricated by tridirectional freezing for High- and Low-Temperature and Impact-Resistant applications

Cited by 16 publications

References 30 publications

Stretchable and negative-Poisson-ratio porous metamaterials

Stretchable and negative-Poisson-ratio porous metamaterials

Flexible and interlocked quartz fibre reinforced dual polyimide network for high-temperature thermal protection

Single-Layer MoS2: A Two-Dimensional Material with Negative Poisson’s Ratio

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