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The effect of rue (Ruta graveolens) and ginger (Zingiber officinale) extracts as antifouling agents in silicone matrix coatings / Ariane V. Zmozinski in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 18, N° 4 (07/2021)
[article]
Titre : The effect of rue (Ruta graveolens) and ginger (Zingiber officinale) extracts as antifouling agents in silicone matrix coatings Type de document : texte imprimé Auteurs : Ariane V. Zmozinski, Auteur ; Rafael S. Peres, Auteur ; Flávia Roberta Brust, Auteur ; Alexandre José Macedo, Auteur ; Emilene Mendes Becker, Auteur ; Amanda Pasinato Napp, Auteur ; Henrique Alves de Brito, Auteur ; Marilene H. Vainstein, Auteur ; Augusto Schrank, Auteur ; Carlos Arthur Ferreira, Auteur Année de publication : 2021 Article en page(s) : p. 1013-1025 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Analyse électrochimique
Caractérisation
Essais (technologie)
Extraits de plantes
Gingembre et constituants
Oléorésines
Revêtements antisalissures:Peinture antisalissures
Revêtements organiques
Rue (plante) et constituants
SiliconesLes silicones, ou polysiloxanes, sont des composés inorganiques formés d'une chaine silicium-oxygène (...-Si-O-Si-O-Si-O-...) sur laquelle des groupes se fixent, sur les atomes de silicium. Certains groupes organiques peuvent être utilisés pour relier entre elles plusieurs de ces chaines (...-Si-O-...). Le type le plus courant est le poly(diméthylsiloxane) linéaire ou PDMS. Le second groupe en importance de matériaux en silicone est celui des résines de silicone, formées par des oligosiloxanes ramifiés ou en forme de cage (wiki).Index. décimale : 667.9 Revêtements et enduits Résumé : The use of rue extract and ginger oleoresin as natural antifouling agents in a silicone matrix was verified in this work. 13C nuclear magnetic resonance (13C NMR) analysis identified a series of compounds with bactericidal properties in the two investigated natural products. Thermogravimetric analyses showed that the addition of rue extract and ginger oleoresin in the silicone matrix increased the thermal stability of the formed films. Electrochemical impedance spectroscopy analysis showed that the presence of both antifouling agents increases the velocity of water diffusion into the film, improving contact between marine water and the two products. Fourier transform infrared spectroscopy confirms that both antifouling agents were trapped inside the silicone matrix. Bacterial adhesion tests showed that rue extract reduced the adhesion of gram-negative bacteria, Escherichia coli, while ginger oleoresin did not show any significant effect. Optical microscopy images demonstrated that the presence of rue extract slightly increased the film’s porosity without impairing the silicone hydrophobicity, while ginger oleoresin significantly altered the film's morphology (reducing the water contact angle). Finally, the sample containing rue extract showed excellent results against marine fouling after 6 months of immersion in a real marine environment. The polymer containing ginger oleoresin showed satisfactory results against marine fouling ; however, the film showed adhesion failures after 6 months. Note de contenu : - EXPERIMENTAL : Materials - Preparation of rue extract - Preparation of silicone coatings - Marine fouling tests - Electrochemical tests - In vitro bacterial adhesion test - Characterization
- RESULTS AND DISCUSSION : Chemical characterization - TGA - Electrochemical analysis - Surface characterization - Bacterial adhesion - Antifouling tests
- Table 1 : Samples composition
- Table 2 : TGA and DTG data from the RUTA and GEN samples
- Table 3 : Transport parameters obtained for blank, GEN, and RUTA samplesDOI : https://doi.org/10.1007/s11998-021-00454-w En ligne : https://link.springer.com/content/pdf/10.1007/s11998-020-00454-w.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=36209
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Code-barres Cote Support Localisation Section Disponibilité 22969 - Périodique Bibliothèque principale Documentaires Disponible The effect of silane layer drying temperature on epoxy coating adhesion on silane-pretreated aluminum substrate / A. Hatefi in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 10, N° 5 (09/2013)
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Titre : The effect of silane layer drying temperature on epoxy coating adhesion on silane-pretreated aluminum substrate Type de document : texte imprimé Auteurs : A. Hatefi, Auteur ; S. Mohagheghi, Auteur ; A. Kianvash, Auteur Année de publication : 2013 Article en page(s) : p. 743-474 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Aluminium L'aluminium est un élément chimique, de symbole Al et de numéro atomique 13. C’est un métal pauvre, malléable, de couleur argent, qui est remarquable pour sa résistance à l’oxydation13 et sa faible densité. C'est le métal le plus abondant de l'écorce terrestre et le troisième élément le plus abondant après l'oxygène et le silicium ; il représente en moyenne 8 % de la masse des matériaux de la surface solide de notre planète. L'aluminium est trop réactif pour exister à l'état natif dans le milieu naturel : on le trouve au contraire sous forme combinée dans plus de 270 minéraux différents, son minerai principal étant la bauxite, où il est présent sous forme d’oxyde hydraté dont on extrait l’alumine. Il peut aussi être extrait de la néphéline, de la leucite, de la sillimanite, de l'andalousite et de la muscovite.
L'aluminium métallique est très oxydable, mais est immédiatement passivé par une fine couche d'alumine Al2O3 imperméable de quelques micromètres d'épaisseur qui protège la masse métallique de la corrosion. On parle de protection cinétique, par opposition à une protection thermodynamique, car l’aluminium reste en tout état de cause très sensible à l'oxydation. Cette résistance à la corrosion et sa remarquable légèreté en ont fait un matériau très utilisé industriellement.
L'aluminium est un produit industriel important, sous forme pure ou alliée, notamment dans l'aéronautique, les transports et la construction. Sa nature réactive en fait également un catalyseur et un additif dans l'industrie chimique ; il est ainsi utilisé pour accroître la puissance explosive du nitrate d'ammonium.
Epoxydes
Métaux -- Revêtements protecteurs
Organosilanes
Promoteurs d'adhésion
Réticulation (polymérisation)
Revêtements organiquesIndex. décimale : 667.9 Revêtements et enduits Résumé : In this study, 3-glycidoxypropiltrimethoxysilane was used as an adhesion promoter to enhance the adhesion strength of epoxy coating on an aluminum (Al) substrate. Silane layer drying temperature was investigated as a factor that has an influence on the adhesion of polymeric coating on metal substrate and also on its performance in wet and corrosive environments. FTIR tests were carried out to study Al/silane interactions. Drying the silane layer at high temperatures formed a condensed siloxane layer that improved the bonding strength as well as the performance of the protective coating in corrosive environments. The highest dry and wet pull-off strengths were obtained at drying temperatures of 100 and 125°C, respectively. DOI : 10.1007/s11998-013-9492-4 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-013-9492-4.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=19808
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Code-barres Cote Support Localisation Section Disponibilité 15618 - Périodique Bibliothèque principale Documentaires Disponible 15679 - Périodique Bibliothèque principale Documentaires Disponible The effect of superhydrophobic surface topography on underwater corrosion resistance of steel / Keqin Zheng in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 18, N° 3 (05/2021)
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Titre : The effect of superhydrophobic surface topography on underwater corrosion resistance of steel Type de document : texte imprimé Auteurs : Keqin Zheng, Auteur ; Jinde Zhang, Auteur ; Erin Keaney, Auteur ; Hanna Dodiuk, Auteur ; Samuel Kenig, Auteur ; Carol Barry, Auteur ; Joey Mead, Auteur Année de publication : 2021 Article en page(s) : p. 685-693 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Acier L'acier est un alliage métallique utilisé dans les domaines de la construction métallique et de la construction mécanique.
L'acier est constitué d'au moins deux éléments, le fer, très majoritaire, et le carbone, dans des proportions comprises entre 0,02 % et 2 % en masse1.
C'est essentiellement la teneur en carbone qui confère à l'alliage les propriétés du métal qu'on appelle "acier". Il existe d’autres métaux à base de fer qui ne sont pas des aciers comme les fontes et les ferronickels par exemple.
Anticorrosifs
Anticorrosion
Epoxydes
Hydrophobie
Matériaux hybrides
Métaux -- Revêtements protecteurs
Revêtements organiques
Surfaces (Physique)
TopographieIndex. décimale : 667.9 Revêtements et enduits Résumé : This article describes the study of the topography effect of superhydrophobic surfaces on the corrosion protection performance of steel through the air plastron behavior when subjected to an underwater environment. A random superhydrophobic surface was fabricated using spray coating and characterized for morphology and wettability by scanning electron microscopy (SEM) and goniometer measurements, respectively. By comparing the coated surfaces both with and without air plastron, it was found that superhydrophobicity postponed the corrosion of the coated steel specimens. This increase in corrosion protection of the superhydrophobic surface was due to the air plastron created by the superhydrophobicity in underwater immersion. Since different areas showed differing air plastron lifetimes (wetting behavior), it was assumed that the underlying topography of the superhydrophobic coating controlled the air plastron lifetime. To investigate this behavior, the micron scale topography of the different areas was studied using the technique of laser confocal microscopy over the specific areas and correlating with air plastron lifetime. Using the theoretical analysis based on superhydrophobic robustness and assuming the solid fraction is the same for different locations, it was demonstrated that the feature size [extracted by roughness analysis as root-mean-square (RMS)] correlated with the air plastron lifetime. It was confirmed from the plot of RMS and air plastron lifetime that smaller feature sizes could extend the air plastron lifetime and provide better anticorrosion performance. Note de contenu : - EXPERIMENTAL : Materials - Pretreatment of steel substrate - Preparation of superhydrophobic coating - Wettability characterization - Air plastron real-time observation - Corrosion resistance evaluation - Topography characterization
- RESULTS AND DISCUSSION : Plastron real-time observation - Corrosion resistance of superhydrophobic coatings - The effect of topography on air plastron lifetimeDOI : https://doi.org/10.1007/s11998-020-00433-1 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-020-00433-1.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=35922
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Code-barres Cote Support Localisation Section Disponibilité 22785 - Périodique Bibliothèque principale Documentaires Disponible The effects of the interaction of pigment coating with ink on the offset print quality / Sinan Sonmez in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 19, N° 6 (11/2022)
[article]
Titre : The effects of the interaction of pigment coating with ink on the offset print quality Type de document : texte imprimé Auteurs : Sinan Sonmez, Auteur ; Roland Gong, Auteur ; Paul D. Fleming, Auteur ; Qingliu Wu, Auteur Année de publication : 2022 Article en page(s) : p. 1851-1858 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Encre
Enrobage (technologie)
Formulation (Génie chimique)
Huile de soja
Offset (imprimerie)
Papier et carton couché
Revêtements organiques
RugositéIndex. décimale : 667.9 Revêtements et enduits Résumé : The study was carried out in order to determine the effect of coating formulations on printing quality. For this purpose, five different coating formulations were created in which kaolin and precipitated calcium carbonate pigments (PCC) were mixed in different proportions. Coating formulations were applied in two layers on a base cardboard. Calendering of the coated base cartons was carried out using a laboratory calender. The prints were made on the calendered cardboards using mineral oil-based, vegetable (soybean) oil-based, and UV inks in a laboratory type offset printing machine. As a result of the study, it was determined that the coating of the base cardboard surface affects the optical and physical properties of the cardboard, the surface properties change according to the amount of pigment used in the formulations, and this change affects the printing quality. In the study, the best printing results in terms of printing quality were obtained with the use of UV ink. Mineral oil-based and vegetable (soybean) oil-based ink were compared in terms of printing quality, and since the values obtained are close to each other, it can be said that vegetable oil-based inks can be preferred instead of mineral oil-based ink, and more environmentally friendly sustainable productions can be realized. It has always provided better results in terms of surface smoothness and printability in coated formulations where the kaolin ratio is increased. Note de contenu : - MATERIALS AND METHODS : Base cardboard characteristics - Coating formulations and application - Performing the test printings
- RESULTS AND DISCUSSION : The surface roughness properties of unprinted coated cardboards - Print density properties - Print lightness properties - Print color properties - Print chroma properties - Delta gloss properties
- Table 1 : Base cardboard layers and their weights
- Table 2 : The properties of the pigment
- Table 3 : The properties of the binder (latex)
- Table 4 : The coating formulationsDOI : https://doi.org/10.1007/s11998-022-00656-4 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-022-00656-4.pdf?pdf=button Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=38502
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Code-barres Cote Support Localisation Section Disponibilité 23804 - Périodique Bibliothèque principale Documentaires Disponible The efficiency of various treatments in protecting wood surfaces against weathering / V. Jirous-Rajkovic in SURFACE COATINGS INTERNATIONAL. PART B : COATINGS TRANSACTIONS, Vol. 87, B1 (02/2004)
[article]
Titre : The efficiency of various treatments in protecting wood surfaces against weathering Type de document : texte imprimé Auteurs : V. Jirous-Rajkovic, Auteur ; D. Radovan, Auteur ; A. Bogner, Auteur Année de publication : 2004 Article en page(s) : p. 15-19 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Bois -- Détérioration
Bois -- Revêtements protecteurs
Bois -- Vernis
Bois extérieurs
Essais accélérés (technologie)
Essais d'adhésion
Lasures
Nitrate de fer
Photostabilisants
Résistance aux conditions climatiques
Revêtements organiques
Stabilisant à la lumière de type amine encombrée
Traitement chimiqueIndex. décimale : 667.9 Revêtements et enduits Résumé : Wood exposed to the outdoors undergoes photo-oxidative degradation in a natural weathering process.
The efficacy of various treatments for the protection of wood surfaces from weathering elements (ultraviolet radiation and water) was investigated by using the measurements of the changes in adhesion on fir and oak samples after their exposure to natural climatic conditions and after accelerated weathering.
The most efficacious of the six UV-protective treatments proved to be the treatment of the wood surfaces with a semi-transparent stain, followed by treatments with a transparent wood stain containing two types of photostabilisers. The stabilisation of the wood surfaces by ferric nitrate did not improve the performance of the wood stain used.Note de contenu : - Wood samples
- Chemical treatments
- Coatings
- Accelerated weathering
- Natural weathering
- Adhesion testing
- Table 1 : Sample codes and description of the treatments
- Table 2 : Mean adhesive strength (MPa) and standard deviations of samples after QUV exposure
- Table 3 : Mean adhesive strength (MPa) and standard deviations of samples after natural exposureDOI : 10.1007/BF02699559 En ligne : https://link.springer.com/content/pdf/10.1007/BF02699559.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=5477
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PermalinkThe influence of coating color, heartwood and sapwood, on moisture content and growth of microorganisms on the surface during outdoor exposure of Norway spruce boards / Tinh Sjökvist in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 16, N° 3 (05/2019)
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