Leather‐Based Multi‐Stimuli Responsive Chromisms

Abstract

Leather is made from the skin of animals and possesses special micro-and nanostructures. Due to the high breathability, durability, strength, elasticity, and softness, leather is widely used in daily life, and is an ideal substrate for future multi-functional wearable smart devices. Herein, two leather-based multistimuli responsive chromic devices denoted as UV/thermo/electro chromic device and UV sensor are developed. The UV/thermo/electro chromic device demonstrates instantaneous and reversible chromic responses to applied UV radiation, heat, and electrical voltage with different color changing styles. The pattern design with the assistance of 3D printed molds and the broad selection of dyes/pigments endow the device with high design flexibility and wide applicability. The leather-based UV sensor exhibits a change in color gradient when exposed to UV radiation with different intensities. For more versatile color options, inactive pigments/dyes can be mixed with stimuli-responsive ones in this system. Coating the leather surface with a polyacrylic finishing agent is also conducted, which is a practical and effective method to protect the pigments and/or dyes in the leather, and improves the usability/durability of the devices. This study opens a new avenue to design and develop wearable devices and individual customization/anti-counterfeiting of leather products.

Multifunctional Wearable Silver Nanowire Decorated Leather Nanocomposites for Joule Heating, Electromagnetic Interference Shielding and Piezoresistive Sensing

“…[37] Huo et al [38] reported the flexible electronic skin (e-skin) with pressure sensing capabilities by integrating the carbon nanotubes (CNTs) with sophisticated leather substrate for human health monitoring. Jia et al [39] demonstrated the fabrication of multi-stimuli responsive chromic devices based on the leather treated with poly(styrene sulfonic acid) doped poly(3,4-ethylenedioxythiophene) (PEDOT:PSS). Shi et al [40] fabricated the lightweight and high-performance EMI shielding nanocomposites by coating metal nanoparticles (MNPs) onto leather.…”

Smart Soft Materials with Multiscale Architecture and Dynamic Surface Topographies

“…8,21,22 These intriguing attributes permit the development of various smart soft photonics or electronics, which can lead to widespread application, including, smart windows, 4,6,10,17 dynamic displays, 1,3,4,7,10,12 rewritable media, 1,3,4,6,7 anticounterfeit tabs, 1,4,6,7 encryption devices 1,4,6,9,10,13 stretchable electronics, 2,5,15 wearable strain sensors, 2,5,6,[10][11][12]15,18 human−machine interface, 2,5 thermal camouflage, 13 humidity sensors, 1,4,6,9 and so on. 8,19,21 The design of such captivating materials has been largely inspired by natural life, particularly the multiscale structure, adaptive mechanism, and dynamic response, which are widely manifested in the animal or plant kingdoms. Thus, one of the most widely adopted efforts in smar...…”

“…The physical and/or chemical characteristics of smart soft materials can be dynamically converted when subjected to external stimuli, such as light, − solvent, ,, mechanical strain, − ,− temperature, ,− ,,, electric and/or magnetic fields, ,,, and so on. ,, These intriguing attributes permit the development of various smart soft photonics or electronics, which can lead to widespread application, including, smart windows, ,,, dynamic displays, ,,,,, rewritable media, ,,,, anticounterfeit tabs, ,,, encryption devices ,,,,, stretchable electronics, ,, wearable strain sensors, ,,,− ,, human–machine interface, , thermal camouflage, humidity sensors, ,,, and so on. ,, The design of such captivating materials has been largely insp...…”

Color-tunable persistent luminescence hybrid materialsviaradiative energy transfer

“…2 Currently, blue and green persistent luminescence phosphors have been welldeveloped and commercialized due to their excellent performance, [3][4][5][6][7][8] but persistent luminescence materials of other colors are still being developed in the laboratory due to their difficult synthesis and poor performance. Colorful spectra will open up opportunities for persistent luminescence materials for applications, especially in new types of light sources, 8,9 optoelectronic devices, [10][11][12] individual customization, 13,14 and advanced information security/information anticounterfeiting. [15][16][17] Therefore, the development of color-tunable photoluminescence materials has important scientific significance and practical value but remains challenging.…”