| Titre : |
Confocal microscopy techniques for coatings research : Surface and depth characterization of latex paint films |
| Type de document : |
texte imprimé |
| Auteurs : |
Wenjun Wu, Auteur ; Dana Garcia, Auteur ; Jeffrey Schneider, Auteur |
| Année de publication : |
2019 |
| Article en page(s) : |
p. 34-45 |
| Note générale : |
Bibliogr. |
| Langues : |
Américain (ame) |
| Catégories : |
Caractérisation
Copolymère styrène acrylique
Latex
Microscopie confocale à balayage laser
Nettoyabilité
Résistance aux taches
Revêtements -- Analyse:Peinture -- Analyse
Revêtements en phase aqueuse:Peinture en phase aqueuse
|
| Index. décimale : |
667.9 Revêtements et enduits |
| Résumé : |
Waterborne coatings are multi-component, heterogeneous systems containing a variety of additives, in addition to water, polymer binders, and pigment particles. The distribution of various ingredients in the coating films directly affects a coating’s appearance and performance ; for example, optical properties, substrate adhesion, chemical resistance, and mechanical durability. Over the years, a plethora of analytical tools have been utilized in coatings characterization and defect identification. Microscopy and vibrational spectroscopy are complementary techniques and the combination of the two can provide the most complete information regarding the distributions of different coatings ingredients, as well as the fate and the impact of liquids or particulates that come into contact with the dried coating films. |
| Note de contenu : |
- EXPERIMENTAL - MATERIALS : Latex and paint samples - Fluorescence of concord grape juice - Confocal Raman microscopy - Confocal laser scanning microscope techniques - Stain resistance and washability
- RESULTS AND DISCUSSION : Example 1 : spatial distribution of styrenated additive in acrylic paint films - Example 2 : Surfactant enrichment on paint film surface - - Example 3 : Characterization of stain resistance, stain penetration, and stain removal : Selection of representative staining material and paint samples - Vizualization and quantification of stain penetration using CLSM - Characterization of stain adsorption, penetration and removal using CRM
- Fig. 1 : Raman spectra of Paint I-SA film
- Fig. 2 : Raman spectra of Paint I-SA film: 4000~800 cm1
- Fig. 3 : Depth attenuation of TiO2 and styrene (20X) bands in Paint I-SA film
- Fig. 4 : Raman intensity ratios of styrene to acrylic in Paint I-SA film
- Fig. 5 : Raman spectra of Paint I film : 4000~800 cm1
- Fig. 6 : 2nd derivatives of Raman spectra for Paint I film before (6a) and after water rinse (6b)
- Fig. 7 : Fluorescence emission spectrum of Welch’s Concord grape juice diluted in water
- Fig. 8 : Stain removal or washability performance of Paint I and Paint II
- Fig. 9 : Fluorescence images of acrylic polymer AP2 film (blue) stained by grape juice
- Fig. 10 : Fluorescence images of grape juice-stained AP2 film after sponge wash using Formula 409
- Fig. 11 : Raman spectrum of partially dried grape juice
- Fig. 12 :Fluorescence emission and unshifted Raman spectra of Concord grape juice
- Fig. 13 : Grape juice-stained and unstained surface spectra of Paint I films
- Fig. 14 : Spectra of unstained and grape juice-stained Paint I (14a) and Paint II (14b)
- Fig. 15 : Difference in discoloration of Paint I and Paint II surfaces by grape juice
- Fig. 16 : Effect of staining time on Paint I (16a) and Paint II (16b) surfaces
- Fig. 17 : Discoloration or color change as a function of grape juice residence time
- Fig. 18 : Effect of washing procedure: sponge wash vs water rinse |
| En ligne : |
https://drive.google.com/file/d/10cF15960T-Isv7D7D5OMH6daBGCNj1GG/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=32559 |
in COATINGS TECH > Vol. 16, N° 5 (05/2019) . - p. 34-45
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