The information content of tensile tests of human hair (wet) is limited: Variables mainly cluster in just two principal components

Wortmann, Franz; Quadflieg, Jutta M.; Wortmann, G

doi:10.1016/j.jmbbm.2022.105145

Cited by 8 publications

(24 citation statements)

References 31 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Thirty fibres were tested from each hair tress under wet and dry conditions. From each successful test, the software (UvWin – 3Phase –Dia‐Stron) extracts a wide variety of stress, strain, and work‐related parameters 17 …”

Section: Methodsmentioning

confidence: 99%

“…Tensile testing provides a large number of variables, which relate to moduli, stresses, various types of work, and strains 17 . For our investigation, we selected as variables elastic modulus ( E ), break extension ( BE ), and break stress ( BS ).…”

Section: Methodsmentioning

confidence: 99%

“…As already described elsewhere, 17 we checked the data distribution for each sample, applying normal‐probability plots. This approach revealed a small number of outliers.…”

Section: Methodsmentioning

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%

See 3 more Smart Citations

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

Self Cite

View full text Add to dashboard Cite

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.

show abstract

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

“…As already described elsewhere, 17 we checked the data distribution for each sample, applying normal‐probability plots. This approach revealed a small number of outliers.…”

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

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

Self Cite

View full text Add to dashboard Cite

show abstract

“…A large number of amino groups in chitosan and carboxyl groups in gelatin produced strong electrostatic interactions, which directly affected the viscosity of the antique ink. Additionally, the brush, which was made from animal hair, was also a protein and had a composition similar to that of the gelatin [22,23], which made it easy to produce physical bonds involving electrostatic interactions and hydrogen bonding between the ink and the brush upon addition of chitosan and collagen; these were firmly absorbed by the brush and enabled the brush to retain the ink.…”

Section: Analyses Of the Properties Of Gelatin Chitosan And Inksmentioning

confidence: 99%

Reproducing ancient Chinese ink depending on gelatin/chitosan and modern experimental methodology

Liu

2022

Herit Sci

View full text Add to dashboard Cite

Chinese ink has very special significance for presentation of artistic effects and preservation of works of art; however, wasted nonrenewable resources, potential toxicity, and complex and inefficient production technologies have limited the development of inks for traditional Chinese culture. Herein, environmentally friendly, practical and antibacterial Chinese ink was prepared by facile heating-stirring of gelatin and the natural polysaccharide chitosan. The internal composition, viscosity, morphology, particle size and antibacterial properties of the ink were characterized by Fourier transform-infrared spectroscopy, X-ray photoelectron spectroscopy, scanning electron microscopy and bacteriostatic zone tests. The results showed that commercial ink (CM) spread easily on Xuan paper and led to imperfect artwork, while the chitosan and gelatin ink (CG) showed good adhesion and stability on Xuan paper. Based on this study, we believe that the good performance of CG ink should be attributed to restrictions arising from its internal chitosan and gelatin network, which restrict diffusion. Finally, the author used CG ink to display traditional Chinese calligraphy and landscape painting and believes that it has significant application prospects and will be used in large-scale production.

show abstract

Fatigue failure testing of human hair: Weibull-analysis for constant strain experiments

Berriche,

Welzel,

Sirenko

et al. 2025

Journal of the Mechanical Behavior of Biomedical Materials

View full text Add to dashboard Cite

The information content of tensile tests of human hair (wet) is limited: Variables mainly cluster in just two principal components

Cited by 8 publications

References 31 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

Reproducing ancient Chinese ink depending on gelatin/chitosan and modern experimental methodology

Fatigue failure testing of human hair: Weibull-analysis for constant strain experiments

Contact Info

Product

Resources

About