Prevention of chemically induced hair damage by means of treatment based on proteins and polysaccharides

Minami, Marcos Magoiti; Rossan, Marcos Roberto; Magalhães, Wagner Vidal; Ferreira, Vitória Tonini Porto; Campos, Patrícia Maria Berardo Gonçalves Maia

doi:10.1111/jocd.14148

Cited by 7 publications

(8 citation statements)

References 25 publications

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“…Interaction effects are essentially negligible (see Table 3). Due to the closeness of the curves in Figure 5b, BS d appears to be only of limited value to determine bleaching related effects 8 but appears suitable with respect to thermal damage.…”

Section: Discussionmentioning

confidence: 97%

“…Tensile testing of keratin fibres, including human hair, is of academic as well as of practical (textile, cosmetic industries) importance. Concentrating for the current context on human hair, tensile tests may in practice be conducted either in water (wet) or under ambient, defined, or standard conditions 1–10 . The choice of conditions may on the one hand be a matter of convenience.…”

Section: Introductionmentioning

confidence: 99%

“…On the basis of common practice 1–3, 6, 8, 10, 11, 15, 20–22 as well as of a recent investigation of the information content of wet tensile testing, 17 we identified three specific variables as being especially suited for our investigation. These are elastic modulus ( E ), break extension ( BE ), and break stress ( BS ).…”

Section: Introductionmentioning

confidence: 99%

“…Concentrating for the current context on human hair, tensile tests may in practice be conducted either in water (wet) or under ambient, defined, or standard conditions. [1][2][3][4][5][6][7][8][9][10] The choice of conditions may on the one hand be a matter of convenience. On the other hand, investigators may decide to employ both conditions, assuming that sets of data are essentially independent and reflect different aspects of hair properties.…”

Section: Introductionmentioning

confidence: 99%

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Comparing hair tensile testing in the wet and the dry state: Possibilities and limitations for detecting changes of hair properties due to chemical and physical treatments

Wortmann

Quadflieg

Wortmann

2022

Intern J of Cosmetic Sci

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Objectives: This investigation focuses, first, on the question to which extent wet and dry tensile tests on human hair may be considered as leading to independent results. Second, we try to assess the sensitivities of wet and dry-testing to detect changes of mechanical properties. Specifically, we were interested in separating changes, which were induced by a combination of a chemical (oxidation/bleach) and a physical treatment (heat). Methods:The basis for our study are data for the tensile properties (wet and dry) of a set of untreated and bleached hair tresses, which were submitted to the same schedule of thermal treatments. As characteristic tensile parameters, we chose modulus (E), break extension (BE), and break stress (BS). First, parameters were analysed across treatments for the correlations between wet and dry data.Second, we applied two-factor analysis of variance to assess the effects of the factors and their potential interaction.Results: Correlations for the dry versus wet data show only a weak relationship for E, while coefficients of determination (R 2 ) are quite high for BE and BS.Two-factor ANOVA enables to quantify the various contributions to the Total Sum-of-Squares for all three parameters. We show that the parameters respond quite differently to the chemical and the thermal treatments as well as to testing conditions (wet or dry). It is of interest to note that the interaction between the chemical and the physical treatment is generally quite weak. For the interpretation of the results, we use the concept of the humidity-dependent as well as strain-induced glass transition of the amorphous matrix. Conclusions:The independence hypothesis for dry and wet tensile measurements only applies for modulus. Overall, we consider modulus (wet) as the best tensile measure of fibre damage when assessing chemical and/or physical treatments. Under ambient conditions (dry), break stress is shown to be a feasible alternative measure.Conclusions: L'hypothèse d'indépendance pour les mesures de traction sec et humide ne s'applique qu'au module. Dans l'ensemble, nous considérons le module (humide) comme la meilleure mesure de traction des dommages des fibres, lors de l'évaluation des traitements chimiques et/ou physiques. Dans des conditions ambiantes (sèches), le stress de rupture est une mesure alternative réalisable.

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Section: Discussionmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Comparing hair tensile testing in the wet and the dry state: Possibilities and limitations for detecting changes of hair properties due to chemical and physical treatments

Wortmann

Quadflieg

Wortmann

2022

Intern J of Cosmetic Sci

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“…Hair samples were stubbed onto sample holders and gold‐coated before scanning electron microscopy (Joel Model JSM‐6360‐LV) using voltage of 20 kV [49] …”

Section: Methodsmentioning

confidence: 99%

Genipa americana L.: A New Phytochemical for White Hair Coloring

Machado,

Menezes,

Santana

et al. 2023

Chemistry & Biodiversity

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This work describes a new hair dyeing methodology using a chemical reaction between geniposide, an iridoid glycoside extracted from the fruit of Genipa americana (geniposide extract, GE) and the amine group of hair keratin. The influence of reaction conditions (pH, temperature, and extract concentration) on the staining of hair fibers, color development, fiber morphology, and mechanical hair properties of black and white human hair samples, was evaluated before and after GE dyeing treatment. Eye contact safety of GE was also studied using HET‐CAM. The treatment of white hair fibers using GE at 20 mg mL−1, temperature of 80 °C and pH 5.5 presented the greatest color change (ΔE=54.0). The higher pH influence was observed at pH 10.0 on white hair tresses (ΔE=6.8), using an GE concentration of 20 mg mL−1 and room temperature (25 °C). Treated samples showed marked changes on mechanical and morphological properties. The HET‐CAM did not show any change, thus demonstrating that using GE is safe. In conclusion, the temperature and concentration of the extract were the variables that mostly influenced the color and hair damage. A new approach for hair dyeing was established where iridoids may potentially be useful as a natural hair dyeing.

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Quantifying the effects of repeated dyeing: Morphological, mechanical, and chemical changes in human hair fibers

Kwon,

Lee,

Jang

et al. 2024

Heliyon

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Prevention of chemically induced hair damage by means of treatment based on proteins and polysaccharides

Cited by 7 publications

References 25 publications

Comparing hair tensile testing in the wet and the dry state: Possibilities and limitations for detecting changes of hair properties due to chemical and physical treatments

Comparing hair tensile testing in the wet and the dry state: Possibilities and limitations for detecting changes of hair properties due to chemical and physical treatments

Genipa americana L.: A New Phytochemical for White Hair Coloring

Quantifying the effects of repeated dyeing: Morphological, mechanical, and chemical changes in human hair fibers

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