December 2025 in “Biopolymers” This study found that chemically treated hair, particularly when subjected to both acid straightening and bleaching, experiences more significant structural damage when exposed to heat, highlighting key changes in both the internal and surface components of hair fibers.
29 citations
,
August 2011 in “PubMed” This study found that selected polymeric pretreatments on hair can significantly reduce breakage and protect against thermal damage from hot flat irons by maintaining cuticle integrity and moisture.
2 citations
,
January 1995 in “Nihon Keshouhin Gijutsushakaishi/Journal of S C C./Nihon Keshouhin Gijutsushakai kaishi” This study found that treating permed hair with diethylene glycol monoethylether significantly reduced the formation of split ends, making it similar to untreated normal hair in terms of split ends generation.
10 citations
,
January 2012 in “Journal of Biological Macromolecules” This study found that keratin film from human hair samples responded to damage from UV, bleaching, perming, and thermal treatments, making it a useful model for evaluating hair damage in product development.
2 citations
,
March 2018 in “ACS Sustainable Chemistry & Engineering” This study found that stepwise thermal treatment of human hair waste at temperatures from 200 to 450 °C produced hollow microtubes, with structure changes influenced by temperature, core degradation, and cortex melting.