TLDR Hair structure changes immediately during perm treatment, with initial damage partially restored later.
This study investigates the swelling behavior of human hair during permanent waving (pw) treatment, focusing on the structural changes in intermediate filaments (IF) of α-keratin protein. The research reveals that both the microstructure and macrostructure of IF begin to change simultaneously at the initial stage of pw treatment without an induction period. The reducing treatment partially destroys the structure of microfibrils, but this is considerably restored by the subsequent oxidizing treatment. The study employs techniques such as SAXS and CP/MAS 13C NMR to analyze these changes, using 1.0 mol/L ammonium thioglycolate solution as the reducing agent. The findings contribute to understanding the detailed swelling behavior of hair during pw treatment.
4 citations,
January 2015 in “Sen'i Gakkaishi” Hair and wool strength is affected by the number and type of bonds in their protein structures, with hair having more protein aggregates than wool.
254 citations,
January 2007 in “Chemical Society Reviews” Hair is a complex protein fiber with unique properties useful for developing hair products.
45 citations,
December 2006 in “Biopolymers” Permanent waving weakens hair by altering its protein structure.
20 citations,
July 1988 in “Clinics in dermatology” Thioglycolate lotions are the most popular method for permanent waving and hair straightening.
53 citations,
July 2016 in “Cosmetics” Future hair cosmetics will be safer and more effective.
5 citations,
February 2022 in “Acta Biomaterialia” Nanomaterials can improve hair care products and treatments, including hair loss and alopecia, by enhancing stability and safety, and allowing controlled release of compounds, but their safety in cosmetics needs more understanding.
37 citations,
October 2015 in “PeerJ” Perming significantly changes hair's molecular structure, while shampoo and conditioner do not.
19 citations,
January 2009 in “International review of cell and molecular biology” Hair's strength and flexibility come from its protein structure and molecular interactions.
13 citations,
January 2010 in “Advances in Biochemical Engineering / Biotechnology” Understanding hair biology is key to developing better treatments for hair and scalp issues.
