Mechanically ductile, ionically conductive and low-temperature tolerant hydrogel enabled by high-concentration saline towards flexible strain sensor

Mechanically flexible and flame-retardant cellulose nanofibril-based films integrated with MXene and chitosan

“…To further understand the inherent mechanism of flame retardancy in these films, the investigation of structural evolution containing morphology and chemical structure is an effective means [34,35] . As shown in Figure 5A, compared to the unburned area of the PCNF/CS 15 -M 5.0 film, the thickness of the burned area shows a distinct increase (172%, Figure 5B(i) and Supplementary Figure 9), which is a typical indicator of self/intumescent behavior due to the generation and release of nonflammable gases (H 2 O, CO, and CO 2 ) being exposed to the flame environment [26,36] .…”

Versatile nano–micro collagen fiber-based wearable electronics for health monitoring and thermal management

“…[76][77][78] Since the rate of resistance changes to PPy/ SCB@PP-CFs is stable when retaining the same touch action, Morse code can be generated based on the duration of nger touching. The electrical signal induced by short-term touching [79][80][81][82][83][84][85][86][87][88][89][90][91][92] This journal is © The Royal Society of Chemistry 2023 exhibited a spike, representing a "dot", and the electrical signal induced by long-term touching demonstrated a straight line, representing a "dash" (Fig. 5A).…”

“…7L), which demonstrates the ability of the modied shoe to provide real-time status monitoring and visual data feedback on human movement. To demonstrate the advantages of PPy/SCB@PP-CFs in future smart, exible strain sensors, PPy/SCB@PP-CFs are comprehensively compared to some of the previously reported multifunctional exible strain sensors, which are based on CFs, [79][80][81][82] other natural biomass bers, [83][84][85][86] synthetic bers, [87][88][89][90] and nanocomposite hydrogels 91,92 in terms of the tensile/compression strength, air permeability, biocompatibility, super-amphiphobic properties, ame-retardant properties, EMI shielding effectiveness, energy conversion performance, and strain-sensing performance (Fig. 7M).…”

“…(M) Comparison between PPy/SCB@PP-CFs and previously reported multifunctional flexible strain sensors ('3' denotes the presence of the function; '7' denotes the absence of or lack of the corresponding data or evidence for the function. '*' denotes electrothermal conversion; '**' denotes friction power generation; '***' denotes photothermal conversion) [79][80][81][82][83][84][85][86][87][88][89][90][91][92].…”

Ultrastretchable Composite Organohydrogels with Dual Cross-Links Enabling Multimodal Sensing

“…However, the final performance of the hydrogels is highly dependent on the inherent properties of aqueous solutions or their precursors. , The interactions between the water molecules and the three-dimensional polymer networks easily result in freezing at lower temperatures or dehydration at high temperatures, which highly restrict the applications of hydrogels as the substrates of flexible devices. , Inspired by cold-tolerant species, researchers have successfully developed many effective strategies to improve the freezing resistance of hydrogels, including introducing polyols, ionic liquids, salts, or modified polymers, and the solvent replacement is one of the most common routes to introduce the heterogeneities. − For instance, after the replacement with various types of polyols, the freezing point of hydrogels decreased from −70 to −80 °C. , The working temperature ranges, in this way, were highly expanded . As-obtained hydrogels are commonly referred to as synthesized organohydrogels, which have received a lot of interest. ,− …”