| Texto completo | |
| Autor(es): |
Leal, Antonia de Souza
;
Marcondes, Michaela Shiotani
;
Leite, Ariane
;
Leite, Douglas
;
Alves Jr, Clodomiro
;
dos Santos, Laurita
;
Pessoa, Rodrigo
Número total de Autores: 7
|
| Tipo de documento: | Artigo Científico |
| Fonte: | APPLIED SCIENCES-BASEL; v. 15, n. 15, p. 22-pg., 2025-08-01. |
| Resumo | |
Plasma-activated water (PAW), enriched with reactive oxygen and nitrogen species (RONS), presents oxidative and antimicrobial characteristics with potential in cosmetic applications. This study examined the effects of two PAW formulations-nitrate-rich (PAW-N) and peroxide-rich (PAW-P)-on human hair types classified as straight (Type 1), wavy (Type 2), and coily/kinky (Type 4). The impact of PAW on hair structure and chemistry was evaluated using Fourier-transform infrared (FTIR) spectroscopy, scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS), UV-Vis spectrophotometry, and physicochemical analyses of the liquids (pH, ORP, conductivity, and TDS). PAW-N, with high nitrate content (similar to 500 mg/L), low pH (2.15), and elevated conductivity (6244 mu S/cm), induced significant damage to porous hair types, including disulfide bond cleavage, protein oxidation, and lipid degradation, as indicated by FTIR and EDS data. SEM confirmed severe cuticle disruption. In contrast, PAW-P, containing >25 mg/L of hydrogen peroxide and exhibiting milder acidity and lower ionic strength, caused more localized and controlled oxidation with minimal morphological damage. Straight hair showed greater resistance to both treatments, while coily and wavy hair were more susceptible, particularly to PAW-N. These findings suggest that the formulation and ionic profile of PAW should be matched to hair porosity for safe oxidative treatments, supporting the use of PAW-P as a gentler alternative in hair care technologies. (AU) | |
| Processo FAPESP: | 22/11544-0 - EMU tecnológico: aquisição de um sistema de microscopia óptica de varredura de campo próximo acoplado com microscopia de força atômica e espectroscopia Raman aprimorada por ponta para imageamento químico e físico em micro e nanoescala |
| Beneficiário: | Rodrigo Savio Pessoa |
| Modalidade de apoio: | Auxílio à Pesquisa - Programa Infraestrutura - Tecnologia e Inovação |