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Comparative study of the dynamic hydrophobicity of fluoroalkylsilane coatings tilted at acute and obtuse angles / Yuta Higashino in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 15, N° 4 (07/2018)
[article]
Titre : Comparative study of the dynamic hydrophobicity of fluoroalkylsilane coatings tilted at acute and obtuse angles Type de document : texte imprimé Auteurs : Yuta Higashino, Auteur ; Hirokazu Takahashi, Auteur ; Munetoshi Sakai ; Toshihiro Isobe ; Sachiko Matsushita, Auteur ; Akira Nakajima, Auteur Année de publication : 2018 Article en page(s) : p. 891-898 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Angle de glissement
Fluoroalkylsilane
Gouttelettes
Hydrophobie
Revêtements organiquesIndex. décimale : 667.9 Revêtements et enduits Résumé : The relation between surface homogeneity and internal fluidity for a droplet sliding on a surface tilted at acute and obtuse angles was investigated using two hydrophobic fluoroalkylsilane (FAS) coatings with different roughness. The coatings (FAS-smooth and FAS-rough) were prepared on an Si substrate using chemical vapor deposition or soaking methods and were tilted at 35° or 145°. Sliding velocity of water droplets on the surface tilted at 145° was greater than that tilted at 35° for both coatings. For 35° tilting, the dominant mode of the sliding velocity was slipping for FAS-smooth, whereas rolling governed the entire sliding velocity for FAS-rough. The slipping mode was more important than the rolling one for both coatings when they were tilted at 145°. The change of slipping velocity was more remarkable than that of rolling one for both coatings between 35° and 145° tilting. Results show that the difference in gravity direction and contact area of the droplets contributed to this tilt angle dependence of the sliding velocity. When a droplet slid down with acceleration on FAS-smooth surface, the coefficient of the viscous drag force correlated with the velocity ratio (Utotal/Uslip). DOI : 10.1007/s11998-018-0064-5 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-018-0064-5.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=30866
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Code-barres Cote Support Localisation Section Disponibilité 20078 - Périodique Bibliothèque principale Documentaires Disponible Fabrication method of large-scale and mechanically durable superhydrophobic silicon rubber/aerogel coating on fibrous substrates / Nowrouz Mohammad Nouri in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 14, N° 2 (03/2017)
[article]
Titre : Fabrication method of large-scale and mechanically durable superhydrophobic silicon rubber/aerogel coating on fibrous substrates Type de document : texte imprimé Auteurs : Nowrouz Mohammad Nouri, Auteur ; Mohammad Saadat-Bakhsh, Auteur Année de publication : 2017 Article en page(s) : p. 477–488 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Aérogels
Angle de contact
Angle de glissement
Elastomères silicones vulcanisables à chaud
Essais de résilience
Hydrophobie
Matériaux fibreux
Pulvérisation électrostatique
Revêtements -- Propriétés mécaniques
Surfaces (technologie)
ToluèneLe toluène, également appelé méthylbenzène ou phénylméthane est un hydrocarbure aromatique sous la forme d'un liquide transparent, très répandu et utilisé comme produit de départ industriel ou comme solvant. Il dissout un grand nombre d'huiles, graisses, résines (naturelles ou de synthèse). Il a une odeur caractéristique (type dissolvant pour peinture) rappelant celle, douceâtre, du benzène apparenté.Index. décimale : 667.9 Revêtements et enduits Résumé : We report on a simple and large-scale method for the fabrication of mechanically durable superhydrophobic coatings via electrostatic powder spray of aerogel micro particles on the fibrous substrates. The coatings are obtained by dip-coating fibrous substrates in silicon rubber/toluene solution, followed by the electrostatic spray of aerogel micro particles on the samples. The method is applicable to a large number of fibrous substrates with different pore sizes. Depending on the silicon rubber solution concentration, it is possible to obtain surfaces with hierarchical morphology. The wetting behavior dependent on the concentration of silicon rubber/toluene solution can provide coatings with static water contact angles (160°–168°) and sliding angles (3°–21°). Fibrous surfaces obtained were characterized by scanning electron microscopy and static water contact angle measurement. Also, mechanical durability of the surfaces was examined using high pressure airflow, sandpaper abrasion test, and water static pressure. Note de contenu : - EXPERIMENTAL SECTION : Dip-coating of substrates - Electrostatic powder spray of aerogel particles
- RESULTS AND DISCUSSION : Surface morphology - Static water contact angle (CA) and sliding angle (SA) measurements - Mechanical stabilityDOI : 10.1007/s11998-016-9868-3 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-016-9868-3.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=28162
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Code-barres Cote Support Localisation Section Disponibilité 18781 - Périodique Bibliothèque principale Documentaires Disponible Nano-cerium dioxide synergistic potential on abrasion resistance and surface properties of polyurethane-nanocomposite coatings for esthetic and decorative applications on wood / Akbar Mastouri Mansourabad in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 17, N° 6 (11/2020)
[article]
Titre : Nano-cerium dioxide synergistic potential on abrasion resistance and surface properties of polyurethane-nanocomposite coatings for esthetic and decorative applications on wood Type de document : texte imprimé Auteurs : Akbar Mastouri Mansourabad, Auteur ; Mohammad Azadfallah, Auteur ; Asghar Tarmian, Auteur ; Davood Efhami Sisi, Auteur Année de publication : 2020 Article en page(s) : p. 1559-1570 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Adhésion
Angle de glissement
Bois -- Revêtements protecteurs
Caractérisation
Essais dynamiques
Formation de film
Oxyde de cérium
Polyuréthanes
Résistance à l'abrasion
Revêtements -- Propriétés optiques
Revêtements organiques
SiliceLa silice est la forme naturelle du dioxyde de silicium (SiO2) qui entre dans la composition de nombreux minéraux.
La silice existe à l'état libre sous différentes formes cristallines ou amorphes et à l'état combiné dans les silicates, les groupes SiO2 étant alors liés à d'autres atomes (Al : Aluminium, Fe : Fer, Mg : Magnésium, Ca : Calcium, Na : Sodium, K : Potassium...).
Les silicates sont les constituants principaux du manteau et de l'écorce terrestre. La silice libre est également très abondante dans la nature, sous forme de quartz, de calcédoine et de terre de diatomée. La silice représente 60,6 % de la masse de la croûte terrestre continentale.
Statistique
Synergie
Traitement thermique
Transition vitreuseIndex. décimale : 667.9 Revêtements et enduits Résumé : Development of an antiabrasion and optical shield clearcoat for wooden art and decorative works improves its esthetic durability and lifetime. In this study, the synergistic potentials of cerium dioxide nanoparticles (NPs) were exploited to improve the abrasive, structural, and surface properties of polyurethane (PU)/silica nanocomposite coatings applied on the thermally modified spruce wood. Microhardness, adhesion strength, contact angle, and UV–Vis spectroscopy were used to evaluate the nanocomposite coatings’ surface properties. FE-SEM and EDS techniques were also employed to scrutinize distribution of NPs in the structure of nanocomposite coatings. The results showed that the abrasion resistance significantly improves by increasing the content of silica NPs. However, microhardness and performance of nanocomposite coatings containing a high percentage of silica diminished due to the aggregation of NPs and poor crosslinking of the polymer matrix. The presence of cerium dioxide NPs as a synergistic function in the PU coatings containing nano-silica enhanced the abrasion resistance as well as the glass transition temperature and caused enhanced hardness. Incorporation of cerium dioxide NPs exhibited an incremental effect on the adhesion strength of nanocomposite coatings. However, its presence in high concentration caused an adverse impact on the transparency of the nanocomposite films. In addition, wettability of PU/silica composites remained constant after incorporating high levels of cerium oxide NPs. These findings suggest that use of Ce–Si NPs hybrid/blend in the structure of PU coatings can assure the durability of wood coatings for esthetic applications and interior decoration by strengthening the surface, mechanical, and optical properties. Note de contenu : - EXPERIMENTAL METHODS AND MATERIALS : Materials - Preparation of nanocomposite coatings - Differential scanning calorimetry (DSC) - Microhardness and adhesion strength measurements - Scanning electron microscopy (SEM) studies - Optical properties - Abrasion resistance and film thicknesses on wood - Contact angle - Statistical analysis
- RESULTS AND DISCUSSION : Glass transition temperature (Tg) - Microhardness - Adhesion strength - SEM and EDS - Nanocomposite film formation - Abrasion resistance - Optical properties of coated wood and nanocomposite films - Contact angleDOI : https://doi.org/10.1007/s11998-020-00374-9 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-020-00374-9.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=34960
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 17, N° 6 (11/2020) . - p. 1559-1570[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 22458 - Périodique Bibliothèque principale Documentaires Disponible A simple and cost-effective method for fabricating lotus-effect composite coatings / Changhong Su in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 9, N° 2 (03/2012)
[article]
Titre : A simple and cost-effective method for fabricating lotus-effect composite coatings Type de document : texte imprimé Auteurs : Changhong Su, Auteur Année de publication : 2012 Article en page(s) : p. 135-141 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Angle de contact
Angle de glissement
Composites
Epoxydes
Hydrophobie
Nanoparticules
Particules (matières)
Revêtements:Peinture
SiliceLa silice est la forme naturelle du dioxyde de silicium (SiO2) qui entre dans la composition de nombreux minéraux.
La silice existe à l'état libre sous différentes formes cristallines ou amorphes et à l'état combiné dans les silicates, les groupes SiO2 étant alors liés à d'autres atomes (Al : Aluminium, Fe : Fer, Mg : Magnésium, Ca : Calcium, Na : Sodium, K : Potassium...).
Les silicates sont les constituants principaux du manteau et de l'écorce terrestre. La silice libre est également très abondante dans la nature, sous forme de quartz, de calcédoine et de terre de diatomée. La silice représente 60,6 % de la masse de la croûte terrestre continentale.Index. décimale : 667.9 Revêtements et enduits Résumé : This paper reports the fabrication of a lotus-effect coating by grafting epoxy (EP) resin on the surface of microsilica and nanosilica, respectively, and subsequent spraying. The coating shows the same structure and capability as lotus leaves, and shows a static contact angle as large as 165° and a sliding angle as small as 2.5°. SEM analysis shows that the hydrophobic capability depends on the surface structure of the coatings. This method may be suited for processing large scale or irregular surfaces. Note de contenu : - EXPERIMENTAL : Materials and chemicals - Preparation of the EP solution - Fabrication of lotus-effect coatings - Measurement
- RESULTS AND DISCUSSION : Preparation of dual-sized surfaces - Static CA and SA - Surface morphology - Chemical elements of the surface - Discussion of the relationship between hydrophobic ability and surface morphologyDOI : 10.1007/s11998-009-9230-0 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-009-9230-0.pdf?pdf=button Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=14363
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Code-barres Cote Support Localisation Section Disponibilité 14096 - Périodique Bibliothèque principale Documentaires Disponible 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
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Code-barres Cote Support Localisation Section Disponibilité 23672 - Périodique Bibliothèque principale Documentaires Disponible