A Photo-Crosslinked Casein-Tannic Acid System for Enhanced Hair Protection: A Green Chemistry Approach.

In the initial Hookean region ( Figure 6 D), although not reaching statistical significance, Young’s modulus values show an increasing trend from untreated hair (5.97 ± 0.61 GPa) to casein + TA-coated hair (7.35 ± 1.67 GPa) and photo-crosslinked casein + TA + RFP + BL-treated hair (7.76 ± 0.54 GPa).

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While these differences did not reach statistical significance due to the inherent variability in this transitional region, the trend suggests that the non-crosslinked casein + TA coating reduces resistance during the α-to-β transformation, facilitating the structural transition and contributing to the increased elongation observed in Figure 6 C.

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