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The preparation of hydrophobic hybrid film coatings from siloxane-modified polyacrylate associated with nano-fumed silica and organo-modified clay / Weepol Pramualkijja in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 19, N° 5 (09/2022)
[article]
Titre : The preparation of hydrophobic hybrid film coatings from siloxane-modified polyacrylate associated with nano-fumed silica and organo-modified clay Type de document : texte imprimé Auteurs : Weepol Pramualkijja, Auteur ; Nantana Jiratumnukul, Auteur Année de publication : 2022 Article en page(s) : p. 1467-1492 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Adhésion
Angle de contact
Angle de glissement
Argile
Caractérisation
Dispersions et suspensions
Hydrophobie
Matériaux hybrides
Morphologie (matériaux)
Polyacrylates
Polymères modifiés siloxane
Revêtements organiques
Rugosité
Structure chimiqueIndex. décimale : 667.9 Revêtements et enduits Résumé : Superhydrophobic hybrid film coatings were prepared from the dispersions of siloxane-modified polyacrylate associated with organo-modified clay (OMC-20A) and hydrophobic-fumed silica (FS-H15) coated on glass and cement boards by a dipping process. The hydrophobicity, surface morphology, surface energy, and surface roughness of the obtained hybrid film coatings (HBFCs) were investigated. The results showed that the hydrophobicity of the obtained HBFCs was related to surface roughness and the roughness profile of the surface. HBFCs obtained using 10 phr OMC-20A with 35 phr FS-H15 in hybrid coatings and fabricated by four dipping provided high roughness surfaces (Rq) at 546.67 nm with a micro-nano-binary structure and a low surface energy at 2.35 mN/m leading to superhydrophobic surfaces on the coated glass and cement boards demonstrating 151.34° and 150.88° water contact angles, respectively. As a result, these HBFCs coated on cement board performed great water repellent and self-cleaning. Note de contenu : - Experimental : Materials
- Preparation of SMPA
- Preparation of the HCs
- Fabrication of the HBFCs
- Characterization
- Results and discussion : SMPA dispersions - Hydrophobicity related with adhesion and hardness - Surface morphology - The chemical structure of HBFCs - Surface energy - Surface roughness and profile of roughness
- Effect of porous substrates : The water contact angle, water repellent and self-cleaning - The durability
- Table 1 : Recipes of the different HC1s
- Table 2 : Recipes of the different HC2s
- Table 3 : Adhesion of the HBFCs
- Table 4 : The sliding angle of HBFC1 and 2s
- Table 5 : The water, EG and glycerol contact angles of the different HCsDOI : https://doi.org/10.1007/s11998-022-00621-1 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-022-00621-1.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=38284
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 19, N° 5 (09/2022) . - p. 1467-1492[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 23672 - Périodique Bibliothèque principale Documentaires Disponible The role of roughness in the adhesion of two 'elastic' bodies - A coatings perspective / D. Hosseinpour in SURFACE COATINGS INTERNATIONAL, Vol. 95, 6 (12/2012)
[article]
Titre : The role of roughness in the adhesion of two 'elastic' bodies - A coatings perspective Type de document : texte imprimé Auteurs : D. Hosseinpour, Auteur ; James Thomas Guthrie, Auteur Année de publication : 2012 Article en page(s) : p. 290-294 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Revêtements:Peinture
Rugosité
Surfaces (Physique)Index. décimale : 667.9 Revêtements et enduits Résumé : Surface roughness plays an important role in most contact and coatings-related mechanical processes, including adhesion and friction, since such roughness changes the contact area as well as contact mechanics between the two bodies. Few, if any surfaces are smooth when considered at a submicroscopic level, and the surface may possess roughness in several length scales ranging from micro to nano-scale. Note de contenu : - Thin layer deposition technologies
- Measuring the strenght of adhesion
- Experimental methods and materialsEn ligne : https://drive.google.com/file/d/1PbOKVsK_myIsoJTFrjLDnpzq6PCsQr1F/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=16816
in SURFACE COATINGS INTERNATIONAL > Vol. 95, 6 (12/2012) . - p. 290-294[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 14417 - Périodique Bibliothèque principale Documentaires Disponible The roughness of lip skin is related to the ceramide profile in the stratum corneum / Eiko Tamura in INTERNATIONAL JOURNAL OF COSMETIC SCIENCE, Vol. 38, N° 6 (12/2016)
[article]
Titre : The roughness of lip skin is related to the ceramide profile in the stratum corneum Type de document : texte imprimé Auteurs : Eiko Tamura, Auteur ; J. Ishikawa, Auteur ; A. Naoe, Auteur ; T. Yamamoto, Auteur Année de publication : 2016 Article en page(s) : p. 615-621 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Céramides Un céramide est un sphingolipide résultant de la combinaison d'un acide gras avec la sphingosine via une liaison amide. On trouve de telles molécules en abondance dans les membranes cellulaires, où elles entrent notamment dans la constitution des sphingomyélines. Les céramides ne jouent pas qu'un rôle structurel dans les membranes biologiques, et peuvent également revêtir des fonctions de signalisation lipidique. Leurs actions les mieux comprises vont de la différenciation cellulaire à la mort cellulaire programmée (apoptose) en passant par la prolifération cellulaire.
Les acides gras qui les constituent ont généralement un nombre pair (de 16 à 24) d'atomes de carbone, sont saturés ou monoinsaturés, et sont souvent α-hydroxylés.
La plupart des céramides n'existent pas à l'état naturel si ce n'est comme précurseurs de la biosynthèse des sphingolipides par une réaction d'addition sur la fonction alcool primaire de la sphingosine. (Wikipedia)
Couche cornée
Lèvres
Peau -- analyse
RugositéIndex. décimale : 668.5 Parfums et cosmétiques Résumé : Objective : The structure of skin on the lips is different from skin at other areas of the body; the water content of the stratum corneum (SC) and the barrier function there is low. Therefore, the lips can easily become dry and rough. The SC plays an important role in the barrier and water-holding functions of the skin. Above all, ceramides (CERs) are important SC lipids which maintain SC functions. The purpose of this study was to clarify the relationship between the degree of lip roughness and the CER profile.
Methods : Forty-one Japanese female subjects with normal skin (age range 22–52 years; mean 34.1) were enrolled in this study. The degree of lip roughness was scored, the values of capacitance and transepidermal water loss (TEWL) were measured and CER profiles of the SC were analysed using tape-stripping.
Results : The degree of lip roughness was related to the capacitance values but not the TEWL values. The roughness level correlated with the levels of CER[NH], CER[NP], CER[AH], CER[EOS] and CER[EOH] and the average carbon numbers of CER[NDS], CER[NH] and CER[NP] but not with the level of total CERs. The capacitance values of the lips were related not only with the levels of total CERs but also with the levels of CER[NH], CER[NP], CER[AH], CER[AP], CER[EOS], CER[EOH] and CER[EOP] and with the average carbon numbers of CER[NDS], CER[NS], CER[NH] and CER[NP]. The TEWL values of the lips were related not only with the levels of total CERs but also with the levels of CER[NH], CER[AH], CER[AP], CER[EOS] and CER[EOH].
Conclusion : The relationship between lip roughness and the CER profile was clarified for the first time. The results suggest that not only the level of total CERs but also the specific CER species and their carbon numbers affect the maintenance of SC function.Note de contenu : - MATERIALS AND METHODS : Ethics - Subjects - Biophysical measurements of the SC - Degree of lip roughness - Stratum corneum stripping and preparation of SC samples - Analysis of CER species - determination of average carbon numbers of CERs - Protein analysis - Statistical analysis
- RESULTS : Correlation between lip roughness scores and SC parameters - Correlation between lip roughness scores and CER profiles - Correlation between SC parameters and CER profiles
- DISCUSSION : Correlation between lip roughness and SC functions - Correlation betweenlip roughness and CER profiles - Correlation between SC functions and CER profilesDOI : 10.1111/ics.12335 En ligne : http://onlinelibrary.wiley.com/doi/10.1111/ics.12335 Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=27539
in INTERNATIONAL JOURNAL OF COSMETIC SCIENCE > Vol. 38, N° 6 (12/2016) . - p. 615-621[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 18479 - Périodique Bibliothèque principale Documentaires Disponible Thiamidol containing treatment regimens in facial hyperpigmentation : An international multi-centre approach consisting of a double-blind, controlled, split-face study and of an open-label, real-world study / W. G. Philipp-Dormston in INTERNATIONAL JOURNAL OF COSMETIC SCIENCE, Vol. 42, N° 4 (08/2020)
[article]
Titre : Thiamidol containing treatment regimens in facial hyperpigmentation : An international multi-centre approach consisting of a double-blind, controlled, split-face study and of an open-label, real-world study Type de document : document électronique Auteurs : W. G. Philipp-Dormston, Auteur ; A. Vila Echagüe, Auteur ; S. H. Pérez Damonte, Auteur ; J. Riedel, Auteur ; A. Filbry, Auteur ; K. Warnke, Auteur ; C. Lofrano, Auteur ; D. Roggenkamp, Auteur ; G. Nippel, Auteur Année de publication : 2020 Article en page(s) : p. 377-387 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Dermo-cosmétologie
Emulsions -- Emploi en cosmétologie
Peau -- Physiologie
Pigmentation, Troubles de la
Rugosité
Thiamidol
Visage -- Soins et hygièneIndex. décimale : 668.5 Parfums et cosmétiques Résumé : - Objective : Tyrosinase is the rate-limiting enzyme in melanogenesis. Thiamidol is the most potent inhibitor of human tyrosinase out of 50 000 tested compounds. In clinical studies, it was shown to improve facial hyperpigmentation, post-inflammatory hyperpigmentation and age spots significantly. To identify the optimal number of daily Thiamidol applications, we conducted a split-face study comparing the efficacy and tolerability of four-times with two-times daily application. Subsequently, we evaluated the efficacy and tolerability of a typical face care regimen containing Thiamidol in a real-world study.
- Methods : The split-face study was double-blind, randomized, controlled, including two Thiamidol containing products (serum and day care SPF 30). The serum was applied twice daily on one half of the face and the day care SPF30 twice-daily on the whole face. The real-world study was open-label, observational, including three Thiamidol containing products (day care SPF 30 in the morning, serum and night care in the evening). In both studies, subjects with mild-to-moderate facial hyperpigmentation applied the products over 12 weeks. Assessments included clinical and subjective grading of hyperpigmentation, skin condition, hemi-/modified MASI, chromameter and clinical photography.
- Results : In the split-face study (n = 34), hyperpigmentation, skin roughness and hMASI improved all significantly (P < 0.001) versus baseline, with first visible results after two weeks of twice-daily application. The four-times daily application led to significant improvement versus the two-times daily application. In the real-world study (n = 83), all evaluated parameters, including skin condition and chromametry (n = 30), improved significantly (P < 0.001) in comparison with baseline and the corresponding preceding visits. The subjects judged the cosmetic properties of the products positively. In both studies, the products were well tolerated.
- Conclusion : Four-times daily Thiamidol improves facial hyperpigmentation significantly more than two-times daily and is well tolerated by the subjects. The real-world study with a typical face care regimen containing Thiamidol shows improvement of facial hyperpigmentation and confirms tolerability. Furthermore, the data provide evidence for the suitability of this three-product Thiamidol regimen for day-to-day life.Note de contenu : - MATERIALS AND METHODS : Split-face study - Real-world study - Statistics
- RESULTS : Split-face study - Real-world study
- Table 1 : Overview of methods of the two studies (split-face and real-world)
- Table 2 : INCI composition of the test products
- Table 3 : Demographic characteristics of the subjects of both studies (splitface and real-world)
- Table 4 : Self-grading of product performanceDOI : https://doi.org/10.1111/ics.12626 En ligne : https://drive.google.com/file/d/1qaZx6p66xka-JhsDsVVOmJVwNg88ZpiO/view?usp=shari [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=35289
in INTERNATIONAL JOURNAL OF COSMETIC SCIENCE > Vol. 42, N° 4 (08/2020) . - p. 377-387[article]Transparent UV-cured clay/UV-based nanocomposite coatings on wood substrates : surface roughness and effect of relative humidity on optical properties / William Nguegang Nkeuwa in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 14, N° 3 (05/2017)
[article]
Titre : Transparent UV-cured clay/UV-based nanocomposite coatings on wood substrates : surface roughness and effect of relative humidity on optical properties Type de document : texte imprimé Auteurs : William Nguegang Nkeuwa, Auteur ; Bernard Riedl, Auteur ; Véronic Landry, Auteur Année de publication : 2017 Article en page(s) : p. 555-569 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Air -- Humidité
Analyse de varianceEn statistique, l'analyse de la variance (terme souvent abrégé par le terme anglais ANOVA : ANalysis Of VAriance) est un ensemble de modèles statistiques utilisés pour vérifier si les moyennes des groupes proviennent d'une même population. Les groupes correspondent aux modalités d'une variable qualitative (p. ex. variable : traitement; modalités : programme d'entrainement sportif, suppléments alimentaires ; placebo) et les moyennes sont calculés à partir d'une variable continue (p. ex. gain musculaire).
Ce test s'applique lorsque l'on mesure une ou plusieurs variables explicatives catégorielles (appelées alors facteurs de variabilité, leurs différentes modalités étant parfois appelées "niveaux") qui ont de l'influence sur la loi d'une variable continue à expliquer. On parle d'analyse à un facteur lorsque l'analyse porte sur un modèle décrit par un seul facteur de variabilité, d'analyse à deux facteurs ou d'analyse multifactorielle sinon. (Wikipedia)
Bois -- Revêtements protecteurs
Brillance (optique)
Décoloration
Essais accélérés (technologie)
Nanoparticules
Revêtements -- Propriétés optiques
Revêtements -- Séchage sous rayonnement ultraviolet
Revêtements multicouches
Rugosité
Statistique
Surfaces -- AnalyseIndex. décimale : 667.9 Revêtements et enduits Résumé : The esthetic durability of coatings on wood surfaces of components constituting wood furniture used in bathrooms is generally affected by high humidity. In this study, surfaces of yellow birch wood (Betula alleghaniensis Britton) were protected with three different types of transparent UV-cured multilayer coatings (MCs), namely MC1, MC2, and MC3. Each MC consisted of three layers: primer, sealer, and topcoat. MC1, MC2, and MC3 contained, respectively, 0, 1, and 3 wt% of nanoclay (NC) in the topcoat, while no nanoparticle was added in the primer and sealer. The surface roughness of coated wood surfaces was measured before accelerated aging and optical properties (color and gloss) were investigated before, during, and after accelerated aging. Statistical results have shown that: (1) all coated wood samples have a similar surface roughness and (2) NC in the topcoat does not have a significant effect on initial color, whereas its effect on initial gloss is significant. There is a significant effect on relative humidity (RH) on color changes, but not between the different types of MCs. With respect to gloss, a lowering of gloss retention with the increase in aging time and RH has been observed for all coatings on wood surfaces. Significant differences appear only at high RH between: MC1 vs MC3 and MC2 vs MC3. Note de contenu : - EXPERIMENTAL : Materials - Statistical design - Coated wood samples : preparation and accelerated aging - Characterization - Statistical analysis
- RESULTS AND DISCUSSION : Surface roughness initial color, and gloss of coated wood surfaces - Color changes and gloss retention of coated wood surfacesDOI : 10.1007/s11998-016-9873-6 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-016-9873-6.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=28565
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 14, N° 3 (05/2017) . - p. 555-569[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 18899 - Périodique Bibliothèque principale Documentaires Disponible Water resistance improvement of paperboard by coating formulations based on nanoscale pigments / Wasin Thitsartarn in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 17, N° 6 (11/2020)
PermalinkWeather-stable low-gloss powder coatings / P. Thometzek in JOURNAL OF COATINGS TECHNOLOGY (JCT), Vol. 72, N° 906 (07/2000)
PermalinkZinc-rich primer and UHP waterjetting in severe marine environments / Philippe Le Calvé in JOURNAL OF PROTECTIVE COATINGS & LININGS (JPCL), Vol. 34, N° 3 (03/2017)
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