Tactile Texture of Cosmetic Sponges and Their Friction Behavior under Accelerated Movement

Asanuma, Natsumi; Aita, Yuuki; Nonomura, Yoshiaki

doi:10.5650/jos.ess18038

Cited by 12 publications

(12 citation statements)

References 12 publications

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“…One of the major focuses in skin tribology was the relation between tribological properties and skin perception, tactile and haptics, particularly the finger [471,472]. Both the skin and the perceived objects were involved in the contact and therefore were important considerations, including surface texture [473,474], softness [475], and chemistry [476], etc. Perception was correlated with tribological properties such as friction, vibration, stickiness, contact mechanics [477], and different environments [478,479], and different subjects including age, gender, etc [480,481].…”

Section: Skin Tribologymentioning

confidence: 99%

A review of recent advances in tribology

et al. 2020

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The reach of tribology has expanded in diverse fields and tribology related research activities have seen immense growth during the last decade. This review takes stock of the recent advances in research pertaining to different aspects of tribology within the last 2 to 3 years. Different aspects of tribology that have been reviewed including lubrication, wear and surface engineering, biotribology, high temperature tribology, and computational tribology. This review attempts to highlight recent research and also presents future outlook pertaining to these aspects. It may however be noted that there are limitations of this review. One of the most important of these is that tribology being a highly multidisciplinary field, the research results are widely spread across various disciplines and there can be omissions because of this. Secondly, the topics dealt with in the field of tribology include only some of the salient topics (such as lubrication, wear, surface engineering, biotribology, high temperature tribology, and computational tribology) but there are many more aspects of tribology that have not been covered in this review. Despite these limitations it is hoped that such a review will bring the most recent salient research in focus and will be beneficial for the growing community of tribology researchers.

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Section: Skin Tribologymentioning

confidence: 99%

A review of recent advances in tribology

et al. 2020

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“…The parameter δ is an important parameter for understanding the friction of viscoelastic materials. The parameter δ of the gel and elastic sponge exceeded that of the polymer film, which was hard to deform. − …”

Section: Introductionmentioning

confidence: 99%

Friction Dynamics of Hydrogel Substrates with a Fractal Surface: Effects of Thickness

et al. 2020

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Interfacial phenomena on soft and wet materials, such as hydrogels, are important for modeling physical phenomena, such as friction, wetting, and adhesion on hydrophilic biosurfaces. Interfacial phenomena on soft material surfaces are not only affected by the properties of the surface but also by the geometry of the substrate. However, there are few reports on the influence of geometry and deformability on friction behavior at gel interfaces. In this study, we evaluate the effects of the thickness ( H ) of the upper agar gel layer on the friction force between gels under a sinusoidal movement. Although H does not significantly affect the friction force or pattern, the normalized delay time (δ), which is the normalized time lag in the friction force response to the contact probe’s movement, increases with H . A regression analysis between δ and H shows that δ increased linearly with H . We present a simple model incorporating a shear modulus to qualitatively explain the experimental results. The analysis and our model indicate that one must not only consider surface properties, such as adhesion, but also thickness and rigidity when studying friction behavior at the gel–surface interface. These findings will be useful for understanding friction phenomena on soft biological systems, such as the tongue, throat, esophagus, and gut surfaces.

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“…We also evaluated the friction dynamics on fractal agar gels, which mimic the shape and wettability of the tongue surface, and found that the friction profiles vary with the surface shape, vertical load, friction velocity and substance [15–18]. Asanuma et al found that the cosmetic sponge feels highly slippery when the friction force is low [19]. Kikegawa et al [20] reported that solid materials, such as powders and cloths, have a moist feel when the difference between the static and dynamic friction coefficients is large.…”

Section: Introductionmentioning

confidence: 99%

Friction dynamics of moisturized human skin under non‐linear motion

Sakata

Mayama

Nonomura

2021

Intern J of Cosmetic Sci

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Objective Evaluating friction in human skin is important to assess its condition and the effects of skincare cosmetics. In this study, we evaluated the friction dynamics of moisturized skin to show the effects of moisturization on its mechanical properties. Methods Friction force was evaluated using a sinusoidal motion friction evaluation system. The skin of the upper arm of 20 subjects was rubbed using a contact probe. The water content of the stratum corneum and the softness of the skin were measured using a Corneometer and a Cutometer, respectively. Results When human skin was treated with water or 10 wt% glycerol aqueous solution, the friction coefficients increased by 0.23 ± 0.01 and 0.17 ± 0.14, respectively, and the delay times (normalized by calculating the time interval from contact with the probe to the friction response divided by the friction time for one round trip) increased by 0.048 ± 0.034 and 0.055 ± 0.024, respectively. Three different friction profiles were observed: (a) a stable pattern, in which a smooth profile was observed during the sliding process; (b) an oscillation pattern, in which significant oscillation was obtained; and (c) a stick pattern, in which the friction coefficient increased even during the deceleration process. In the case of untreated skin, the oscillation pattern was observed for the majority of subjects. The appearance rate of the stick pattern increased by 80.3% ± 29.4% after treatment with 10 wt% glycerol aqueous solution. These characteristic friction profiles can be explained by a two‐step friction model consisting of two modes: (a) friction at the skin surface and (b) the delayed response due to skin deformation. Conclusion Moisturizing the skin with water or 10 wt% glycerol aqueous solution increased the friction coefficient and delay time, dramatically changing the friction profile. These changes were considered to be due to the swelling and softening of the stratum corneum and the increased true contact area between the contact probe and the skin surface.

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Tactile Texture of Cosmetic Sponges and Their Friction Behavior under Accelerated Movement

Cited by 12 publications

References 12 publications

A review of recent advances in tribology

A review of recent advances in tribology

Friction Dynamics of Hydrogel Substrates with a Fractal Surface: Effects of Thickness

Friction dynamics of moisturized human skin under non‐linear motion

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