Page 100 - Read Online

Huang et al. Soft Sci. 2025, 5, 24 https://dx.doi.org/10.20517/ss.2025.07 Page 7 of 19

Figure 2. Mechanical properties of PCM organohydrogels. Images exhibiting that the PCM organohydrogel can (A) withstand large
direct stretching and twisted stretching and (B) lift a 100 g weight; (C) The tensile stress-strain curves and (D) corresponding
elongation at break and tensile strength of PCM organohydrogels with different MXene contents; (E) Continuous loading-unloading
curves of the PCM organohydrogel under increased strains without rest time and (F) the corresponding U ; (G) Twenty successive
hys
loading-unloading curves of the PCM organohydrogel with a preset strain of 500% and (H) the corresponding U . PCM:
hys
PAM/CS/MXene.
long-lasting strain sensor for wearable electronics.

Reliable self-adhesion behaviors of the PCM organohydrogels are crucial for their practical applications as
wearable strain sensors, which can effectively enhance the interfacial connection and ensure accurate stable
signal collection . As depicted in Figure 3A, the PCM organohydrogel can readily adhere to a wide range of
[9]
substrates, including wood, iron, rubber, pigskin, plastic, and paper. Meanwhile, it presents excellent
conformality to fit into curved contour surface, such as human skin, making it ideal for detecting complex
movements [Figure 3B]. Impressively, the PCM organohydrogel can be easily peeled off without leaving
residue or causing irritation to the skin after 20 peeling cycles. The adhesion strength of the PCM
organohydrogel was quantitatively evaluated through lap shear measurements [Figure 3C]. As seen in
Supplementary Figure 10, the adhesion strength is closely correlated with the CS content in the PCM
organohydrogel. The improvement in adhesiveness is ascribed to the introduction of CS, which enhances
cohesion within the gel system . The universal adhesiveness of the PCM organohydrogel is demonstrated
[29]
on a variety of substrates, highlighting its versatility and effectiveness. The PCM organohydrogel exhibits