Polymer‐Regulating MXene@Dopamine Electroactive Gel‐Inks for Textile‐Based Multi‐Protective Wearables

Abstract

Abstract2D transition metal carbide/nitride (MXene) show significant potential for fabricating flexible wearables due to its outstanding electroactive characteristic. However, the complex processes in rheology regulation and easy agglomeration of MXene nanosheets hinder their applications as inks for homogeneous printing and coating. Herein, an electroactive gel‐ink with a low concentration of MXene (20 mg mL−1) using poly(3,4‐ethylenedioxythiophene):poly(sodium 4‐styrenesulfonate) (PEDOT:PSS) as a dopant and conductive binder is developed. The dopamine‐involved modification and PEDOT:PSS doping together promote the formation of ordered lamellar structure of MXene nanosheets, and in turn the nanosheets can regulate the interconnected electronic structure of PEDOT:PSS, which enables the transition from micellar to linear structures. Through adjusting the combination ratio of dopamine‐modified MXene (MD) to PEDOT:PSS, the viscosity of MXene inks (MDP) is tunable within 1–104 Pa·s to realize scalable printing and other processing. Screen‐printing with MDP gel‐ink endows textiles with excellent conductive stability while retaining the inherent wearability of the original fabric. With high conductivity (109.6 S m−1) and low mid‐infrared emissivity (0.34), the decorated textiles exhibit remarkable multi‐protective abilities. This work provides a novel strategy for formulating versatile MXene inks that will facilitate the large‐scale fabrication of high‐performance personal wearable multi‐protective textiles.

A Novel MXene@MOF@Pt NPs-Based Enzyme-Free Electrochemical Sensor for Highly Sensitive Detection of Hydrogen Peroxide Released from Living Cells

“…Additionally, the sensor's design can be further optimized by combining screen printing electrodes and intelligent wireless sensors, making it more portable and easier to operate, suitable for on-site diagnosis and remote monitoring. 47 Moreover, another potential direction is to combine MXene@ZIF-8@Pt NPs, which have excellent biocompatibility, with microelectrodes for in vivo analysis. This will provide medical staff with realtime and accurate biological information to guide clinical decisionmaking.…”

MXene Nanosheets Assembled onto Cationic-Modified Cotton for Smart Multiprotection Textiles

“…MXene is an emerging family of 2D transition metal carbide/nitride (MXene) materials that have received increasing attention since its first discovery in 2011 . Due to its unique chemical surface, conductivity comparable to metals, and typical nanolayer structure, MXene has been successfully applied in the preparation of multifunctional flexible smart textiles through various coating technologies. − In particular, due to its abundance of hydrophilic functional groups on the surface, MXene can be applied directly to modify fiber surfaces in aqueous solutions and imparts excellent electrical conductivity to textiles. However, due to the unique properties of MXene structure, it is highly susceptible to oxidation when exposed in air and water, easily resulting in a decrease or loss of conductivity .…”