[article]
| Titre : |
Heat reflective coatings |
| Type de document : |
texte imprimé |
| Auteurs : |
Rakesh Jain, Auteur ; Vrushali Shinde, Auteur ; Amit Joshi, Auteur ; Chandrashekara R. Haramagatti, Auteur |
| Année de publication : |
2018 |
| Article en page(s) : |
p. 68-84 |
| Note générale : |
Bibliogr. |
| Langues : |
Anglais (eng) |
| Catégories : |
Economies d'énergie
Pigments inorganiques
Rayonnement infrarouge
Réflectivité thermique
Toiture -- Revêtements:Toiture -- Peinture
|
| Index. décimale : |
667.9 Revêtements et enduits |
| Résumé : |
Paints and coatings offer various advantages along with the aesthetic value to the substrates to which it is applied. Binders and pigments majorly contribute to various advantages of the coatings. Particularly, pigments contribution is obviously for color and opacity to the paint. Apart from color and opacity the properties such as particle size, shape, and chemistry determines the performance of the coatings. Pigments with exceptionally high light fastness, heat/IR reflectance properties are essential for exterior coatings. Preferably the roofs which are exposed most to the solar radiation impact on the high heat build-up, and add to the load on cooling. To overcome such issues mixed metal oxide/complex inorganic pigments are generally used in heat/IR reflective coating. These pigments with high total solar reflectance (TSR), results in reflecting the IR radiation and keep the surface or interior cooler. Thus they contribute to energy savings, sustainability, provide long life to coating as well as the buildings. This review article focusses on various aspects of the heat/IR reflective coatings, particularly decorative applications : The types of pigments, processes, mechanisms, advantages, and contribution to the sustainability are highlighted. |
| Note de contenu : |
- SOLAR SPECTRUM AND HEAT BUILD UP : Total solar reflectance (TSR)
- TYPES OF IR REFLECTIVE PIGMENTS : Inorganic pigments - Complex inorganic color pigments (CICPs)
- MECHANISM OF COOL EFFECT
- APPLICATIONS AND ADVANTAGES : Roof/roof tile - Military - Automotive
- FIGURES : 1. Classification of solar passive cooling techniques for roofs - 2. Visual comparison of the cool color and conventional color. Cool colors are based on yellow : yellow 346 (chrome antimony), black : black 28 (copper chromite), brown 1 : brown 157 (zinc iron chromite), brown 2 : brown rosse 208 (iron oxide) - 3. A typical solar spectrum covering UV, visible and IR radiations - 4. Path of light as it penetrates two different coatings, one having pigments with a higher refractive index than the other - 5. Reflectance curves for different types of black, and the red colored curve represents non IR reflective type of black - 6. Correlation between TSR value and surface temperature for black pigments - 7. Reflectance curves for inorganic cobalt blue and organic phtalocyanine (Phtalo) blue - 8. Spectral solar reflectance of TiO2, a green leaf, standard carbon black and a complex inorganic color pigment containing infrared reflective (Fe, Cr)2O3 pigment (Normalized Solar Irradiance Shown for Reference) - 9. Principle of light falling on a surface - 10. Natural sunlight exposure in Florida shows that the CRCMs have improved the fade resistance of the painted PVDF metals
- TABLE : Major suppliers, color index number, chemistry of some IR reflective pigments |
| En ligne : |
https://drive.google.com/file/d/1MnQXxwnefNB6XO_-tVvTYp06z5pMZ9Ri/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=30324 |
in PAINTINDIA > Vol. LXVIII, N° 1 (01/2018) . - p. 68-84
[article]
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