Anisotropic Printed Resistor with Linear Sensitivity Based on Nano–Microfiller‐Filled Polymer Composite

Abstract

Abstract3D printing electronics provides great potential to build structural objects with multiple functionalities, with the assistance of shape design and the shear force on the filler orientation. In the study, nano–microanisotropic sensors with oriented fillers assure its linear sensitive properties, where the sensors are 3D‐printed based upon the carbon fiber (CF)‐ and multiwalled carbon nanotube (MCNT)‐filled polydimethylsiloxane (PDMS). The synergistic effect of CF and MCNT modifies the printability, mechanical properties, and sensitivity of printed sensors. The introduction of anticatalyst and catalyst guarantee the printable mixtures with a stable printability in a long term (>15 days). Assisted by the shear flow, the fillers own the orientation ration of 78.53%, which further contribute to the linear sensing behaviors under the tensile strain of 0–20% and compressive stress of 0–20 kPa. Frequency‐domain signals and visual demonstration on the cyclic stretch test reveal that the double peak is originated from the hysteresis of the strain to applied stress. Anisotropic electromechanical behaviors of the resistors will inspire to quantitatively analyze multidimensional strains in practical applications. The fingerprint inspired resistors with multiple sensing signals further demonstrate the convenience of the printing process on the design of wearable electronics.

A Soft Electro-Hydraulic Pneumatic Actuator with Self-Sensing Capability toward Multi-Modal Haptic Feedback

“…It was found out the resistance increased with the loaded pressures, which was further related to the increases in the displacements and deformations of the lower electrode. The increase in the area of the bulged film increased the distance between the neighboring MWCNTs, and the resistances hence increased [31,32]. The resistance of the lower electrode increased from the initial 59 kΩ to 238 kΩ when the pressure of 5 kPa was loaded.…”

An embedded printed flexible strain resistance sensor via micro-structure design on graphene-filled conductive silicon rubber

“…Flexible strain sensors * Author to whom any correspondence should be addressed. can be categorized into resistance sensors [8,9], capacitance sensors [10,11], piezoelectric sensors [12,13], and fieldeffect transistor sensors [14,15] etc. Flexible strain resistance sensors (FSRSs) take advantage of the simplicity of the signal interpretation and its straight manufacturing process [16][17][18][19].…”

“…A high structural accuracy of CSM of the FSRS can be achieved by 3D printing process, as the 3D printing process is featured with technical economy, high speed, and high repeatability [12,31]. Compared with metal fillers, carbon fillers are more favorable in 3D printed CSR with their suitable density and electrical conductivity [8,[32][33][34].…”