Keeping up appearances / Gerhard Jonschker in EUROPEAN COATINGS JOURNAL (ECJ), N° 7-8 (07-08/2016)  

[article]  inEUROPEAN COATINGS JOURNAL (ECJ) > N° 7-8 (07-08/2016) . - p. 38-42 Titre : Keeping up appearances : Easy-to-clean coatings : a review of materials and applications Type de document : texte imprimé Auteurs : Gerhard Jonschker, Auteur Année de publication : 2016 Article en page(s) : p. 38-42 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Dioxyde de silicium Fluoropolymères Matériaux -- Propriétés fonctionnelles Polysilanes Polysilazanes Résistance à l'abrasion Revêtements -- Propriétés mécaniques:Peinture -- Propriétés mécaniques Silanes Silicones Les 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). Surfaces -- Nettoyage Index. décimale : 667.9 Revêtements et enduits Résumé : Easy-to-clean coatings are used across a wide and growing range of applications. Technologies differ, depending on the substrate, application and the nature of the contaminants to be dealt with. A number of these technologies are described, and the advantages of some newer developments are highlighted. Note de contenu : - Easy-to-clean coating technologies summarised - Fluoropolymers - Advantages and environmental issues - Friction, wetting and durability issues - Silazanes : the easier route to ultra-hard coatings En ligne : https://drive.google.com/file/d/1S1_u2FUaUXxk7EjQzK5s8Qoe9Ta_RepS/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=26726 [article]

Réservation

Réserver ce document

Exemplaires (1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
18224	-	Périodique	Bibliothèque principale	Documentaires	Disponible

Optimum performance at the lowest thickness / Ainhoa Altube in EUROPEAN COATINGS JOURNAL (ECJ), (01-02/2024)  

[article]  inEUROPEAN COATINGS JOURNAL (ECJ) > (01-02/2024) . - p. 28-31 Titre : Optimum performance at the lowest thickness : PSZN-containing coatings for enhanced protection at low curing temperatures Type de document : texte imprimé Auteurs : Ainhoa Altube, Auteur ; Ana Vinuales, Auteur ; Eva García-Lecina, Auteur ; Estibaliz Rodriguez, Auteur Année de publication : 2024 Article en page(s) : p. 28-31 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Anticorrosifs Anticorrosion Hydrophobie Métaux -- Revêtements protecteurs Polysilazanes Résistance thermique Revêtements organiques Silanes Sol-gel, Procédé Index. décimale : 667.9 Revêtements et enduits Résumé : When it comes to corrosion protection coatings, sol-gel based formulations have many advantages over conventional organic paints. However, to get the best performance from such formulations they must be cured at high temperatures (around 150 °C), which means that the process is energy-consuming and has a high environmental impact. However, lower curing temperatures, especially at room temperature, normally yield very porous non-protective coatings. Moreover, some large parts cannot be placed in an oven (e. g. a ship’s hull) and others are heat-sensitive substrates (polymers) that deteriorate when heated. Note de contenu : - Sol-gels - Invisible protection - Excellent adhesion - Outstanding corrosion resistance at low curing temperature - Hydrophobic properties - Heat resistance - Even for food contact - Table 1 : Copper coated resistance to simulated aqueous, acidic and fatty foodstuff En ligne : https://drive.google.com/file/d/1Gm7KaudotBczGUo481ezBq2zDI3IMWHo/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=40500 [article]

Réservation

Réserver ce document

Exemplaires (1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
24497	-	Périodique	Bibliothèque principale	Documentaires	Disponible

Polymethyl (hydro)/polydimethylsilazane-derived coatings applied on AA1050: effect of the dilution in butyl acetate on the structural and electrochemical properties / Michele Fedel in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 16, N° 4 (07/2019)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 16, N° 4 (07/2019) . - p. 1013-1019 Titre : Polymethyl (hydro)/polydimethylsilazane-derived coatings applied on AA1050: effect of the dilution in butyl acetate on the structural and electrochemical properties Type de document : texte imprimé Auteurs : Michele Fedel, Auteur ; Stefano Rossi, Auteur ; Flavio Deflorian, Auteur Année de publication : 2019 Article en page(s) : p. 1013-1019 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Aluminium -- Alliages Couches minces Hydrophobie Oléophobie Polysilazanes Revêtements anti-graffitis Spectroscopie d'impédance électrochimique Index. décimale : 667.9 Revêtements et enduits Résumé : Polyorganosilazane (PSZ) has been used for many years as a ceramic precursor for the preparation of silicon carbonitrides. Recently, polymethyl (hydro)/polydimethylsilazane-derived coatings that can be cured with atmospheric moisture at low temperatures have attracted interest due to their hydrophobic nature and electrochemical properties. In this work, polymethyl (hydro)/polydimethylsilazane-derived coatings have been deposited on aluminum alloy AA1050. The effect of the PSZ precursor concentration (5–40 v/v%) on the final properties of the coatings has been investigated. Butyl acetate has been employed as solvent. The layers were applied on the substrate by dipping. The experimental results showed that the concentration of the PSZ in the solvent strongly affects the dry thickness of the hybrid layer. The electrochemical impedance spectroscopy measurements revealed that the coatings derived from PSZ precursor concentration higher than 20 v/v% are protective and homogenous. Contact angle measurements evidenced that the presence of the coatings increased the hydrophobicity of the substrate as well as the oleophobicity regardless of the dilution in the organic solvent. The graffiti resistance of the coatings has been demonstrated to be acceptable regardless of the dilution of the PSZ precursor, in the investigated range. DOI : 10.1007/s11998-018-00176-0 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-018-00176-0.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=32857 [article]

Réservation

Réserver ce document

Exemplaires (1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
21127	-	Périodique	Bibliothèque principale	Documentaires	Disponible

Polysilazanes / Yang Wang in COATINGS TECH, Vol. 16, N° 6 (06/2019)  

[article]  inCOATINGS TECH > Vol. 16, N° 6 (06/2019) . - p. 38-45 Titre : Polysilazanes : Binders that make a difference to surfaces Type de document : texte imprimé Auteurs : Yang Wang, Auteur ; Ralf Grottenmuller, Auteur ; Theresa Lorenz, Auteur Année de publication : 2019 Article en page(s) : p. 38-45 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Anticorrosifs Anticorrosion Essais accélérés (technologie) Liants Polysilazanes Résistance au rayonnement ultraviolet Résistance aux conditions climatiques Revêtements -- Additifs:Peinture -- Additifs Revêtements anti-graffitis Revêtements organiques Stabilité thermique Index. décimale : 667.9 Revêtements et enduits Résumé : Polysilazanes are pre-ceramic polymers with a silicon-nitrogen backbone. In recent years they have developed as a high-performance binder in protective coatings for transportation vehicles, commercial and residential buildings, and industrial plants. This article reviews their structure-property relationship and highlights their performance in high-temperature, surface hardness, weathering and corrosion protection, and anti-graffiti applications. Note de contenu : - Synthesis and process - Heat stability - Surface Hardness - Weather and corrosion resistance - Anti-graffiti properties - Coating uniformity - Fig. 1 : Polymer structures for PHPS and OPSZ, where R is H, CH3, CH=CH2, other alkyl, or aryl groups - Fig. 2 : Polymer structures for PHPS and OPSZ, where R is H, CH3, CH=CH2, other alkyl, or aryl groups - Fig. 3 : The two curing routes for OPSZ, where R1 and R2 are H, CH3, CH=CH2, other alkyl or aryl groups - Fig. 4 : Thermal stability evaluation of polysilazanes. Panel A shows the results of TGA for polysilazanes and two commercial silicone resins. All materials were dried at 120°C for four hours before TGA to simulate the thermal stability of their coatings. Panel B shows a stainless-steel exhaust pipe coated with both PHPS and OPSZ-based TBC. Panel C compares the visual appearance of a coated and uncoated exhaust pipe after pyrolysis at 1000°C for one hour in air. Panels B and C were obtained from the Royal Society of Chemistry and Motz et al. at the University of Bayreuth with permission - Fig. 5 : Characteristics of surface hardness for PHPS and OPSZ coatings. Panel A displays data of surface hardness for PHPS coatings on silicon substrates cured at different temperatures. These coatings have a film thickness of 1–1.2 μm. The hardness was measured via pencil hardness (in blue bars), Martens hardness (orange dots), and indentation resistance (black dots). The dots lines are guides for the eyes. Panel B shows a reference scale of pencil hardness, Martens hardness, and indentation resistance by using a bare glass and PMMA substrate. Panel C shows the anti-scratching property for a ∼3 μm thick OPSZ coating in clearcoat applications, and Panel D shows a similar performance for pigmented coatings. Both pigmented coatings have 17 wt% of pigment loading, a film thickness of 10–12 μm, and the right panel has 40 wt% polysilazane as a binder. Crockmeter test was performed by using an Atlas AATCC Crockmeter with 3M Wet-or-Dry 281Q rubbing cloth - Fig. 6 : Panel A shows two steel substrates after a 10-day water condensation test at a constant humidity of 50%. They have an electrochemically deposited white basecoat with a film thickness of 15–20 μm that partially covers the substrates. The substrate on the left has a 3–4 μm thick polysilazane-based clearcoat, while the one on the right does not. Panel B shows a similar comparison of coated and uncoated areas on a steel substrate after three days of HCl vapor exposure at room temperature [a beaker of HCl solution (37 vol%) was placed in the test chamber]. The coating thickness is about 2 μm - Fig. 7 : Panel A is a comparison of contact angle and surface energy for polysilazanes and three common binder materials, including nitrocellulose lacquer, acrylates, and polyurethanes. Also shown in Panel A is the value of the polar and dispersive component of surface energy, and surface energy is a sum of the polar and dispersive component. Panel B shows water drop shapes and contact angle measurements on a neat polysilazane coating and on a formulated polysilazane coating with other surface additives - Fig. 8 : Panel A is a marker test to demonstrate the ink repellency and easy-to-clean properties for a polysilazane based clearcoat. The inset shows the results after cleaning with a dry towel. Panel B is the result of an anti-graffiti test performed on a similar coating according to ASTM D6578, where level 1—dry cloth, level 2—mild detergent solution, level 3— limonene-based cleaner, level 4—isopropanol, and level 5—methyl ethyl ketone, n.c.—not cleanable - Fig. 9 : Three-dimensional surface morphology scans for a bare steel substrate (A), an OPSZ-based clearcoat on a steel panel (B), and a similar coating on a glass substrate (C). The polysilazane coating thickness is about 15 μm and 10 μm on the steel and the glass substrate, respectively - Table 1 : DIN/EN/ISO tests that OPSZ-based coatingsz have successfully passed - Table 2 : OPSZ coating performance before and after artificial weathering and UV stability test En ligne : https://drive.google.com/file/d/1KuEizt3Csd6O2NpcxCtM9uj10C1GeiwC/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=32737 [article]

Réservation

Réserver ce document

Exemplaires (1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
21023	-	Périodique	Bibliothèque principale	Documentaires	Disponible

Silicon and nitrogen / Vu Can in EUROPEAN COATINGS JOURNAL (ECJ), N° 02/2008 (02/2008)  

[article]  inEUROPEAN COATINGS JOURNAL (ECJ) > N° 02/2008 (02/2008) . - p. 38-43 Titre : Silicon and nitrogen : Polysilazanes produce thin-film easy-to-clean and corrosive finishes Type de document : texte imprimé Auteurs : Vu Can, Auteur ; Stefan Brand, Auteur ; Frank Osterod, Auteur Année de publication : 2008 Article en page(s) : p. 38-43 Note générale : Notes bibliogr. Langues : Anglais (eng) Catégories : Anticorrosifs Anticorrosion Polymères organiques-inorganiques Polysilazanes Revêtements anti-graffitis Revêtements protecteurs Index. décimale : 667.9 Revêtements et enduits Résumé : A new class of inorganic or hybrid organic/inorganic polymers called polysilazanes with silicon-nitrogen -(Si-N)- linkages inthe polymer backbone has been developed. Upon pyrolysis they form ceramics, but even curing at normal stoving or ambient temperatures can provide high performance coatings. Their use to protect against graffiti, corrosion and weathering is reviewed. En ligne : https://drive.google.com/file/d/1wuVixTWf9cs9i7y0CoC2V_4h42OaRy8u/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=2425 [article]

Réservation

Réserver ce document

Exemplaires (1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
009648	-	Périodique	Bibliothèque principale	Documentaires	Disponible

The best defence / Yang Wang in EUROPEAN COATINGS JOURNAL (ECJ), N° 7-8 (07-08/2021)  

Permalink

---

1 (1 - 6 / 6)