Fig. 5
Evaluation of the hydrophobicity of the hair surface by 16-MHA. a Contact angle measurements versus time measurements from images of a water droplet on virgin hair (black), hair with 18-MEA removed (red), bioconjugated hair with 16-MHA added to the damaged hair followed by one wash (blue), and hair coated with 16-MHA without a carbodiimide reaction on the damaged hair (violet) and washed once (green). The solid lines indicate the fitted linear regression lines. b Contact angle at 15 s. Images are water droplets (0.3 µL) suspended on the different hair surfaces at 15 s.
