Tubular Sensor with Multi-Axial Strain Sensibility and Heating Capability Based on Bio-Mimic Helical Networks

Abstract

Sensors are crucial in industrial robotics and smart production line owing to the basic needs for human− machine communication and real-time monitoring. However, a lack of versatile sensing capability and multifunctionalities are still two urgent bottlenecks for current sensors to break through. In this study, from the biomimic perspective, helical and tubular structures are introduced into the design of polyolefin elastomer/carbon fibers sensors achieved by a largescale melt-processing featuring helical flow. The helically arranged CF networks could not only reduce the percolation threshold but also detect an external force in the multi-axial direction derived from a simple detach-contact mechanism. With the assistance of computer simulation, unique lateral crushing behaviors were confirmed to be suitable for both large-scale joint motion detection and subtle throat vibration. Moreover, the helical interpenetrating rigid CF networks enabled robust mechanical reliability during more than 5000 operating cycles of lateral crushing as well as self-regulating heating capability. As a proof of concept, antifrost and enhanced transportation for highly viscous liquid medium were also demonstrated which show potential for a hydraulic fluid transportation system. The developed tubular sensor is expected to establish new applications and functionalities to overcome the limitation of current smart devices.

Current Advances and Future Perspectives of Advanced Polymer Processing for Bone and Tissue Engineering: Morphological Control and Applications

“…Differing from one-dimensional axial flow in conventional extrusion process ( Lu et al, 2020 ), helical stress filed is generated in rotation extrusion through the controlled rotation of the die and the mandrel, which realizes the multi-dimensional controllable flow of the melt and improves the functionality of the material ( Li Y. et al, 2019 ). Figure 1A shows the schematic illustration of the rotation extrusion rheometer ( Li et al, 2021a ).…”

“… (A) SEM topography and cell proliferation data of 3D printed fibers with different pore sizes ( Li Y. et al, 2019 ) Copyright 2019, Wiley; (B) With the printing, biomolecule patterns were applied in cellular behavior study and tissue regeneration ( Li et al, 2020 ) Copyright 2020 American Chemical Society; (C) 3D cornea from hESC-LESCs and Human adipose-derived mesenchymal stem cells (hASCs) fabricated using laser-assisted bioprinting ( Sorkio et al, 2018 ) Copyright 2018, Elsevier; (D) Schematic representation of the in vivo laser assisted bioprinting geometries tested and the experimental diagram of mice calvaria restoration ( Keriquel et al, 2017 ) Copyright 2017 Springer Nature. …”

A piezoelectric poly(vinylidene fluoride) tube featuring highly-sensitive and isotropic piezoelectric output for compression

“…This amplication mechanism should be analogous to the reported curved structure. 33 Further, the nite element analysis (FEA) was carried out to reveal the structural dependence of mechanical deformation. Under a compression load, the plate-like sample experienced homogeneous deformation with part stress concentration at the edge and the stress concentrated 8-9 kPa at the load threshold of 1.25 N, which was consistent with the average value of 9 kPa calculated based on the simple stress equation, s ¼ F/S (the corresponding information is available in the ESI, Fig.…”

Multifunctional E‐Textiles Based on Biological Phytic Acid‐Doped Polyaniline/Protein Fabric Nanocomposites

“…Multifunctional electronic devices perform vital functions as their great potential in practical applications of internet-ofthings. [1] In recent years, various flexible electronic devices have been fabricated for human health detection, [2][3][4][5][6][7][8] soft robots technologies, [9][10][11][12] wearable electronics, [13][14][15][16][17][18] energy storing and supplying, [19][20][21][22][23][24] etc. Flexible sensors characterized by environmental friendliness, safety, high sensitivity, and portability are highly desired in next generation electronic devices.…”