Study on the development of wax emulsion with liquid crystal structure and its moisturizing and frictional interactions with skin

Wang, Ye; Li, Jiusheng; Shang, Yazhuo; Zeng, Xiangqiong

doi:10.1016/j.colsurfb.2018.07.039

Cited by 31 publications

(10 citation statements)

References 25 publications

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Section: Discussionmentioning

confidence: 99%

“…In addition, several researchers [16,28,33] have shown that the friction behaviour of human skin in wet conditions follows the Stribeck curve, which indicates how friction changes with increasing entrainment speed for a given lubricant viscosity. From a statistical analysis of the friction results obtained in the second study, it can be found that for PTFE#240: μ TW8.5% > μ TW4% , μ TW8.5% > μ TW6%, μ TW4% ∼ μ TW6% , for PTFE#80: μ TW8.5% > μ TW4% , μ TW8.5% > μ TW6%, μ TW4% ∼ μ TW6% , for PTFE#40: μ TW8.5% ∼ μ TW4% > μ TW6% .…”

Section: Study 2: Aqueous Environments With Different Viscositiesmentioning

confidence: 99%

“…Analysing the behaviour of finger tactile friction in different environments will deepen our understanding of the mechanisms involved in tactile perception and, therefore, be helpful for optimizing hand-operated activities under liquid and moist conditions [13], as well as for the design and operation of intelligent robots in a liquid environment. Also, it would be beneficial for research and development of cosmetic products, such as moisturizers and lotions [14][15][16][17]. Finally, finger-based tactile testing is used as a nonoral based method to characterize oral perception because of the similar sensory assessment of tactility and food texture [11,18].…”

Section: Introductionmentioning

confidence: 99%

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Influence of different fluid environments on tactile perception and finger friction

Zhou

Masen

et al. 2022

J. R. Soc. Interface.

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Human beings often explore and perceive the characteristics of objects by touching with their fingers. During this process, the contact pressure and shear stress acting on the skin also modulate the tactile sensation. The external environment is an important factor that influences tactile perception as well as the finger friction characteristics. The purpose of this study was to investigate the effects of fluid environments, such as air, deionized water (DW) and thickened water (TW), on perceived roughness and relevant friction behaviour during finger movement. Two studies were performed to analyse the effect of fluid environment as well as the influence of lubricant viscosity on finger tactile friction behaviour. Participants conducted perception and sliding friction tests with their index finger in air and submerged in DW and TW, respectively. Perception tests were performed using a pairwise comparison, scoring the perceived roughness difference between a reference sample and the test sample. The statistical analysis showed that there was no significant difference in the roughness perception between air and DW, while the sensitivity of perception reduced with increasing lubricant viscosity. An approximate calculation of the film thickness was combined with classical lubrication theory to investigate the relationship between perception and friction. In TW, the thick film formed between the finger and the polytetrafluoroethylene plate changed the contact of the asperities with the skin, thus changing the subjective judgement and friction.

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Section: Discussionmentioning

confidence: 99%

Section: Study 2: Aqueous Environments With Different Viscositiesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Influence of different fluid environments on tactile perception and finger friction

Zhou

Masen

et al. 2022

J. R. Soc. Interface.

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“…At low deformation values, the predominance of the elastic (G') over the viscous (G'') modulus (Figure 5) indicated a stable solid-like behavior of both A and B formulations [50]. As the strain increased, the elastic component (G') decreased in favor of the viscous component (G''), meaning that the emulsions became progressively fluid-like, and so to flow on the skin more easily [51].…”

Section: Rheological Assessmentsmentioning

confidence: 99%

Development, Characterization, and Clinical Investigation of a New Topical Emulsion System Containing a Castanea sativa Spiny Burs Active Extract

et al. 2021

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The study focused on the development and characterization of an O/W emulsion for skincare containing Castanea sativa spiny burs extract (CSE) as functional agent. The emulsion was stable and had suitable physicochemical and technological properties for dermal application and CSE showed no cytotoxicity in spontaneously immortalized keratinocytes (HaCaT) at active concentrations. A single-blind, placebo-controlled, monocentric study was designed to evaluate the skin tolerability and the skin performance of the CSE-loaded emulsion on healthy human volunteers. An improvement was observed in skin biomechanical properties such as hydration, skin elasticity and a reduction in the periorbital wrinkles in 30 days without altering the skin barrier function, sebum, pH, and erythema values. A significant skin moisturizing effect was detected while the skin barrier function was preserved. The selected natural ingredient combined with the designed formulation and the optimized preparation method has led to a final product that satisfies the physico-chemical and technological requirements underlying the safety of use and the formulative stability over time. With no negative skin reactions and highly significant effects on skin elasticity, wrinkles, and moisturization, the CSE-based emulsion achieved very satisfying outcomes representing a promising functional formulation for skin care.

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“…Emulsions play a key role in many industrial products, including cosmetics, toiletries, cleaning agents, paints, and various food products 1 . Emulsions also provide functions of lubrication, 2 moisturizing, 3 monoclonal separation, 4 and protection of active components 5 . Emulsions are mixed systems composed of a dispersed phase and a continuous phase; the partition between the two phases is called the interface 6 .…”

Section: Introductionmentioning

confidence: 99%

Stable O/W emulsions and oleogels with amphiphilic konjac glucomannan network: preparation, characterization, and application

Huang

Cao

et al. 2022

J Sci Food Agric

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BACKGROUND:The stabilization of oil-in-water (O/W) emulsions has long been explored. Assembly of polymer networks is an effective method for stabilizing O/W emulsions. Konjac glucomannan (KGM) is a plant polysaccharide and the network of KGM gel is a good candidate for stabilizing O/W emulsions based on its high viscosity and thickening properties. However, natural KGM has strong hydrophilicity and is not able to offer interfacial activity. Octenyl succinic anhydride (OSA) is a hydrophobic molecule, which is widely used as thickener and stabilizer in food emulsions. In this work, the amphiphilic biopolymer (OSA-KGM) was fabricated by modifying the KGM with OSA. Furthermore, OSA-KGM biopolymer was used to prepare O/W emulsions, which were then freeze-dried and used to prepare oleogels as fat substitute for bakery products.RESULTS: OSA-KGM had advanced hydrophobicity with water contact angle 81.13°and adsorption behavior at the oil-water interface, with interfacial tension decreasing from 18.52 to 13.57 mN m −1 within 1 h. The emulsification of OSA-KGM remarkably improved the stability of emulsions without phase separation during storage for 31 days. Oleogels with OSA-KGM showed good thixotropic and structure recovery properties (approximately 100%) and low oil loss (from 69.5% to 50.4%). Cakes made from oleogels had a softer texture than cakes made from peanut oil and margarine.CONCLUSION: Amphiphilic biopolymer OSA-KGM shows advanced interfacial activity and hydrophobicity. This paper provides an insight into preparing stable O/W emulsions with a new biopolymer and oleogels potentially applied as fat substitute in bakery products.

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Study on the development of wax emulsion with liquid crystal structure and its moisturizing and frictional interactions with skin

Cited by 31 publications

References 25 publications

Influence of different fluid environments on tactile perception and finger friction

Influence of different fluid environments on tactile perception and finger friction

Development, Characterization, and Clinical Investigation of a New Topical Emulsion System Containing a Castanea sativa Spiny Burs Active Extract

Stable O/W emulsions and oleogels with amphiphilic konjac glucomannan network: preparation, characterization, and application

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