| Titre : |
A novel approach for the evaluation of ice release performance of coatings using static friction measurements |
| Type de document : |
texte imprimé |
| Auteurs : |
M. Martinsen, Auteur ; K. O. Hed, Auteur ; J. S. Diget, Auteur ; H. L. Lein, Auteur |
| Année de publication : |
2021 |
| Article en page(s) : |
p. 665-676 |
| Note générale : |
Bibliogr. |
| Langues : |
Américain (ame) |
| Catégories : |
Cisaillement (mécanique)
Frottements (mécanique)
Plan d'expérience
Polyacryliques
PolydiméthylsiloxaneLe polydiméthylsiloxane —[O-Si(CH3)2]n—, ou poly(diméthylsiloxane) selon la nomenclature systématique, communément appelé PDMS ou diméthicone, est un polymère organominéral de la famille des siloxanes souvent présent dans les shampoings. On l'y ajoute pour augmenter le volume des cheveux mais il peut également aller boucher les pores du cuir chevelu et rendre les cheveux gras. C'est une des raisons pour lesquelles se laver les cheveux tous les jours est très déconseillé avec un shampooing contenant des silicones.
Il existe également de l'amodiméthicone, qui est un dérivé du diméthicone.
Le polydiméthylsiloxane est un additif alimentaire (E900), utilisé comme antimoussant dans les boissons (Coca-Cola BlāK).
La chaîne de poly(diméthylsiloxane) forme également la structure de base des huiles et des caoutchoucs silicones.
Polymères -- Synthèse
Polyols
Polyuréthanes
Revêtements -- Propriétés mécaniques
Revêtements anti-adhésion
Revêtements antigel
Revêtements organiques
|
| Tags : |
'Adhérence de la glace' 'Frottement statique' 'Résistance au cisaillement sur |
| Index. décimale : |
667.9 Revêtements et enduits |
| Résumé : |
Atmospheric icing on structures and equipment represents a challenge for operation and safety. Passive ice removal by ice-phobic coatings has received much attention over the last decades. The current state-of-the-art methods for quantifying the ice-release properties of such coatings suffer from a range of drawbacks, including poor reproducibility and high complexity test setups. Here, a facile rotational tribometer approach for measuring the static friction between polymeric coatings and ice is presented. The torque necessary to initiate motion at the coating-ice interphase was used as a measure of ice release. For a polydimethylsiloxane-based coating (Sylgard 184), the effects of ice-temperature, normal force, coating thickness, and dwell time (contact time between coating and ice at rest with fully applied normal force prior to applying torque) were established along with the conditions resulting in least data variation. With these conditions, tribology-based friction measurements were carried out on two additional coatings ; a two-component polyurethane, and a commercial foul release coating. The outcome of the method, i.e., grading of the coatings in terms of antiicing effect, matched those obtained with a widely used ice adhesion test method based on ice shear adhesion testing. The same trends are revealed by the two methods. However, the findings from the proposed tribology-based method result in consistently lower variation in outcomes and offer more detail on the ice adhesion and friction mechanisms. |
| Note de contenu : |
- EXPERIMENTAL : Materials - Analytical methods - Synthesis of polyacrylic polyol - Coating preparations - Break-away torque and sliding friction measurements - Ice shear test - Experimental design
- RESULTS AND DISCUSSION : Determining the break-away torque - Influence of temperature, normal force, dwell time, and coating thickness on break-away torque - Reproducibility of break-away torque measurements for Sylgard 184 - Sliding friction - Correlation between break-away torque and shear stress
- Table 1 : Mechanical properties and static WCA of the test coatings at 23°C
- Table 2 :Defined factors and design space
- Table 3 : Results from the design of experiments with experimental parameters where break-away torque is given as an average of two measurements carried out on the Sylgard 184 coating system |
| DOI : |
https://doi.org/10.1007/s11998-020-00431-3 |
| En ligne : |
https://link.springer.com/content/pdf/10.1007/s11998-020-00431-3.pdf |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=35920 |
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 18, N° 3 (05/2021) . - p. 665-676
Aller sur edunet
Accueil
A novel approach for the evaluation of ice release performance of coatings using static friction measurements in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 18, N° 3 (05/2021)
