Cosmetic systems for structural modification of hair fibers using lignin starch nanoparticles

Abstract

A hair treatment composition is disclosed comprising composite nanoparticles including a lignin phase and a starch phase, an enzyme capable of catalyzing oxidative crosslink formation of lignin phenolic moieties, and a cosmetically acceptable carrier. The composite nanoparticles penetrate cuticle interstices and localize within a cortex region of a hair fiber. Following cortical localization, enzyme activation induces polymerization of the lignin phase to form a polymerized intrafiber scaffold that is physically distinct from keratin and that forms substantially without cleavage of disulfide bonds. The intrafiber scaffold reinforces internal hair fiber structure and improves mechanical properties of the hair. In certain embodiments, chromogenic stabilizers are included to mitigate discoloration associated with enzymatic oxidation. The compositions and methods provide internal reinforcement of hair fibers without chemically altering keratin or disrupting cuticle integrity.

Dependencies are inferred from the claim text.