Advances in Permeation of Solutes into Hair: Influencing Factors and Theoretical Models

The permeation and absorption of solutes into human hair are highly relevant to various applications, including the formulation hair-care products, development water pollution control remediation, risk assessment environmental exposure. Based on a detailed introduction structure composition hair, effects properties (structure, composition, charge properties), physicochemical (molecular size, shape, hydrophobicity), conditions surrounding medium (solvent temperature, pH) were comprehensively analyzed. Several theoretical models reviewed, two-part/two-state, porous media diffusion, homogeneous heterogeneous partition, diffusion models. Finally, future research directions for in proposed provide foundation further optimization application