Surface Submillimeter Papillae Enhanced Mechanical Property of Membrane

Abstract

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.

Integrating Design of Flexible Surface and Gradient Porosity Interlayer for Improving Impact Resistance and Thermal Isolation

“…Further, the hemisphere with a smooth chamfer at the root region can improve the tensile failure resistance of the peel. [ 20 ] As the surface is distorted by an external force, the rupture is always generated in the region without any hemispheres. The hemispherical arrays on the surface ensure safety and generation in nature.…”

A critical review on robust self-cleaning properties of lotus leaf

“…The diameter-to-thickness ratio of the lotus leaf is moderately large, so it is very difficult to preserve the integrity of the leaf. 125,126 Ignoring the fiber pattern inside the lotus leaf, the arrangement of the surface structure is very necessary for the enhancement of its tensile resistance. In a natural environment, the lotus leaf could always remain intact.…”

“…The rupture always generates at the region without sub-mm papillae (a and b). The stress concentration is located at the bottom region of the papillae (c), which effectively enhance it tensile resistance (d-e) 125. (Copyright: 2020, John Wiley and Sons).…”

Recent Developments of Superhydrophobic Surfaces (SHS) for Underwater Drag Reduction Opportunities and Challenges

“…[26] The free energy of the solid surface mainly determines the size of the contact angle. [27] The introduction of nanofilaments in the microstructure will change the contact angle (CA) and slide angle (SA). [28] Nevertheless, increasing the surface roughness will have a two-way impact on the contact angle, which means that increasing the surface roughness does not necessarily increase the sliding length.…”