Fig. 4: Redox-responsive mechanical behaviors of DKBFs. | Nature Communications

Fig. 4: Redox-responsive mechanical behaviors of DKBFs.

From: Chain entanglement enhanced strong and tough wool keratin/albumin fibers for bioabsorbable and immunocompatible surgical sutures

Fig. 4

a. Schematic of the reversible fracture of S-S under reduction treatment by DTT and oxidation treatment by H2O2. b, c Raman spectra analyzing the change in disulfide bond content of DKBFs under different treatments. Rss is the relative S-S content of peak areas of the S-S band (around 510 cm−1) and C-H band (1450 cm−1). Data are represented as mean ± SD (n = 3, three individual specimens were tested for each sample type). d Representative stress-strain curves of DKBFs under different redox treatments. e The breaking strength and toughness analysis of DKBFs under different redox treatments. Data are presented as mean ± SD (original, n = 9; 10 mM DTT, n = 6; 20 mM DTT, n = 7; 30 mM DTT, n = 8; 2% H2O2, n = 7). Statistical significance was determined by two-sample t-tests (OriginPro 2021). ns no significant difference; ∗p < 0.05; ∗∗p < 0.01; ∗∗∗p < 0.001; ∗∗∗∗p < 0.0001.

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