Omnidirectionally Strain‐Unperturbed Tactile Array from Modulus Regulation in Quasi‐Homogeneous Elastomer Meshes

Author:

Xu Liangxu12,Zhao Xuan12ORCID,Xun Xiaochen12,Gao Fangfang12,Gao Lusen12,Bi Shuxin12,Fan Liubing12,Zhao Shuchang12,Liao Qingliang12ORCID,Zhang Yue12ORCID

Affiliation:

1. Academy for Advanced Interdisciplinary Science and Technology Beijing Advanced Innovation Center for Materials Genome Engineering University of Science and Technology Beijing Beijing 100083 P. R. China

2. Key Laboratory of Advanced Materials and Devices for Post‐Moore Chips Ministry of Education Beijing Key Laboratory for Advanced Energy Materials and Technologies School of Materials Science and Engineering University of Science and Technology Beijing Beijing 100083 P. R. China

Abstract

AbstractSkin‐like stretchable tactile arrays are of paramount significance for perceiving physical interactions in dynamic biological tissues, prosthetic limbs, and robots. However, mechanical strain‐induced interference invariably degrades the pressure‐sensing accuracy of tactile arrays. In this work, an omnidirectionally strain‐unperturbed tactile array is prepared through modulus regulation in quasi‐homogeneous elastomer meshes. By varying fiber orientations, the proportion of intrinsic elastic and structural deformations in quasi‐homogeneous elastomer meshes can be adjusted, and the modulus can be regulated from 0.23 to 8.23 MPa. The tactile array combined with low‐ and high‐modulus elastomer meshes enables strain‐unperturbed pressure sensing through local stiffening and controllable deformation. Remarkably, the tactile array exhibits 97% strain insensitivity when stretched 100% along the omniplane directions. Moreover, the quasi‐homogeneous structure endows the tactile array with high robustness, even after 5000 cycles of severe stretching or pressing. By integrating the tactile array with a microcontroller, a tactile visualization system is built to achieve accurate tactile interaction even under multiaxial tensile strain. This work provides an alternative insight into the design of omnidirectionally strain‐unperturbed electronic devices for wide applications on dynamic surfaces.

Funder

National Key Research and Development Program of China

National Natural Science Foundation of China

China Postdoctoral Science Foundation

Overseas Expertise Introduction Project for Discipline Innovation

Fundamental Research Funds for the Central Universities

Publisher

Wiley

Subject

Electrochemistry,Condensed Matter Physics,Biomaterials,Electronic, Optical and Magnetic Materials

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