MXene-Coated Air-Permeable Pressure-Sensing Fabric for Smart Wear

Abstract

Considering the fast development of wearable electronics and soft robotics, pressure sensors with high sensitivity, durability, and washability are of great importance. However, the surface modification of fabrics with high-sensitivity active materials requires that issues associated with poor interface adhesion and stability are resolved. In this study, we explored the key factors for firmly bonding MXene to fabric substrates to fabricate wearable and washable pressure sensing fabric. The interactions between MXene and various fabrics were elucidated by investigating the adsorption and binding capacities. The natural rough surface of cotton fibers also promoted the firm adsorption of MXene. As a result, MXene was difficult to detach, even with mechanical washing and ultrasonic treatment. Further, the abundant functional groups on the MXene surface were conducive to interfacial interactions with cotton fibers. An increase in the amount of fluorine-containing functional groups also improved the hydrophobicity of the fabric surface. The good force-sensitive resistance of MXene-coated cotton allowed this pressure-sensing fabric to function as a flexible pressure sensor, which showed a high gauge factor (7.67 kPa −1 ), a rapid response and relaxation speed (<35 ms), excellent stability (>2000 cycles), and good washing durability. Further, the as-fabricated flexible pressure sensor was demonstrated as a wearable human−machine interface that supported multitouch interactions and exhibited a rapid response. Thus, this work provides a new approach for developing next-generation high-sensitivity wearable pressure sensors.

Controlled Assembly of MXene Nanosheets as an Electrode and Active Layer for High‐Performance Electronic Skin

“…The sensitivity of our sensor is higher than that of the pristine MXene film (Figure S5, Supporting Information) and the previously reported MXene‐based sensor (Figure 3f) and Table S1 (Supporting Information). [ 17,35–43 ] We further attempted to monitor the sensor in a lower pressure range. As shown in Figure S6a (Supporting Information), the flexible sensor creates accurate differentiation for different pressures within the pressure range of 0–61 Pa, and a good linear relationship is maintained for the I – V curves.…”

All‐MXene Cotton‐Based Supercapacitor‐Powered Human Body Thermal Management System

“…These results indicated that only a very small amount of the MXene fakes dropped off from the MCF during the sonication, confirming the strong adhesion between MXene and cotton fiber. Such a good stability is because that the ‐OH group on the surface of MXene could form covalent bonds with the N−O group of cotton fiber to induce a strong interface adhesion [11c] . Moreover, the Ti atoms on MXene would also bond with the N atoms on cotton to create Ti−N bonding, which furtherly contributes to the strong adhesion between MXene flakes and cotton fiber.…”

Recent Advances in Multidimensional (1D, 2D, and 3D) Composite Sensors Derived from MXene: Synthesis, Structure, Application, and Perspective

“…Based on the reported studies, in general MXene has been fully demonstrated the feasibility and practical applicability for wearable intelligent fabric by simple, efficient, and low‐cost method, affording great value for the study of MXene on the next generation of portable, wearable textile‐based electronic devices for human motion monitoring. [ 178 ] However, MXene naturally oxidizes easily in aerobic and aqueous environments, the durability of MXene‐based textile sensor needs to be further studied in future research.…”

“…m) MXene tools pressure detection (single-region and multiregion) and 3D simulation diagrams of pressure-sensitive data. Reproduced with permission [178]. Copyright 2020, American Chemical Society.…”