An Interlayer of Multiple Microscale Hollow Channels Enhances the Durability of Surface Topographies

Ding, Zhiying; Yang, Jing; Li, Peiliu; Xing, Yan; Tang, Shuang-Yan; Wang, Lei

doi:10.1002/cnma.201900726

Cited by 9 publications

(12 citation statements)

References 36 publications

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“…Topological optimization is a usual method in the mechanics field. [20][21][22][23] In this finding, we find that the antistretching of leaf is enhanced due to the topological structure SP. When a flexible smooth leaf without SP under horizontal pulling force (F), the horizontal length deformation (elongation) is dl.…”

supporting

confidence: 56%

Surface Submillimeter Papillae Enhanced Mechanical Property of Membrane

Lei

Zhao²,

et al. 2020

Adv Materials Inter

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The surface topographies of natural surfaces play significant roles for improving the ability to adapt to the environment. The micropapilla of lotus leaf is always used to enhance its self‐cleaning performance. However, the function of the submillimeter papilla of lotus has not been well studied. In this study, it is found that the optimal distribution of submillimeter papilla can effectively prevent the rupture of lotus leaf. Under loading, the submillimeter papilla transfers the stress into its root region, which effectively keeps the leaf broadly intact and collaborates to realize relative functions with micropapilla. Further study by integrating the simulations and biofabricated membrane with artificial submillimeter papilla indicates the contribution of submillimeter papilla on the mechanical property. This study opens a novel avenue for designing strength membrane materials, which has potential applications in the fields of soft robot, electronic device, and packaging.

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supporting

confidence: 56%

Surface Submillimeter Papillae Enhanced Mechanical Property of Membrane

Lei

Zhao²,

et al. 2020

Adv Materials Inter

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“…[ 26–27 ] The wing of Lycorma Delicatula with multiple microscale hollow channels interlayer effectively decrease the stress on the upper surface to protect the its superhydrophobic nano‐topography. [ 28 ] Bone and nacre structures composited with simple building blocks and elastic organic layer perform significant stiffness and robust toughness. [ 29–32 ]…”

Section: Introductionmentioning

confidence: 99%

Design of flexible multi‐level topography for enhancing mechanical property

Wang

Zhao³

et al. 2020

Nano Select

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Robust mechanical property is fundamentally significant for applications of nano‐materials, such as micro‐fluidic, sensor, superhydrophobic/ icephobic, and crush‐resistant functions. However, the nano‐materials used in the applications are always easily ruined due to the poor adhesion and weak mechanical properties. To enhance the nano‐materials’ duration in hash environment, a strategy of robust nano‐topography protection is studied in this paper. In our experiment, a series of multi‐level sub‐mm topography with nano‐materials are fabricated by integrating the methods of soft lithography, and crystal growth. The mechanical properties of nano‐materials are quantitatively studied, and the nano‐material can be protected by the designed flexible multi‐level topography, which significantly decreases the strain and stress of the nano‐structure. To investigate the mechanism of this performance, a series of simulations are performed, and a mechanical model is established to explain this phenomenon. This work uncovers the multi‐level principles for nano‐materials protection and gives a guideline to design the nano‐materials’ surfaces.

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“…For example, the hollow channel array of Lycorma delicatula's wing can effectively transfer the stress from the surface to the interlayer for enhancing the stability of the nanostructures on its wing surface. 22 The porosity gradient structure of pomelo peel can further transfer the stress to the part with large porosity in the bottom layer, which can improve the stability of the outer skin and display a remarkable thermal insulation. [23][24][25][26] Hollow bamboo is one of the most typical and interesting functional grading materials.…”

Section: Introductionmentioning

confidence: 99%