Advances in the Chemical Structure of the Hair Surface, Surface Forces and Interactions

The chapter discussed the importance of understanding the hair surface's chemical and physical properties, which are crucial for the adhesion of hair care products. It highlighted that hair fibers are not homogeneous due to factors like ethnic origin, environmental exposure, and cosmetic treatments. The hair surface is highly structured, with cuticle scales influencing interactions with other fibers, skin, and various molecules. Recent advances in measuring surface forces using Scanning Probe techniques on real hair and model surfaces were presented. The chapter concluded with a review of macroscopic surface properties and their impact on consumer sensory perception.