Fig. 4: Moisture sensitivity and self-healability of PDMAEA-Q/PMAA hydrogel microfiber. | Nature Communications

Fig. 4: Moisture sensitivity and self-healability of PDMAEA-Q/PMAA hydrogel microfiber.

From: Aqueous spinning of robust, self-healable, and crack-resistant hydrogel microfibers enabled by hydrogen bond nanoconfinement

Fig. 4

a Tensile stress-strain curves at different humidities. b Corresponding Young′s moduli and elongations. c, d Humidity-dependent equilibrium water contents, hydration numbers, and effective crosslinking densities. e Schematic mechanism for moisture-induced ultra-rapid self-healing of the hydrogel microfiber which relies on the chain diffusion and reformation of both ionic complexations and H-bond clusters. f Optical images of moisture-induced rapid self-healing of multiple cracks on the microfiber. g Tensile curves of self-healed hydrogel microfibers at different healing time. h Time-dependent healing efficiencies of elongation and tensile strength. i Comparison of the healing time among PDMAEA-Q/PMAA, PDMAEA-Q, and PMAA microfibers. j Photos of original and ANS-doped hydrogel microfibers under UV irradiation. k Fluorescent images of fused hydrogel microfibers with different architectures. Young′s modulus, elongation, water content, and healing efficiency data are presented as mean values ± SD, n = 3 independent samples. Source data are provided as a Source Data file.

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