[article]
| Titre : |
Study on surface wetting property regulation of greenhouse film and its antifogging performance |
| Type de document : |
texte imprimé |
| Auteurs : |
Dapeng Fu, Auteur ; Zhenzhen Chu, Auteur ; Xuening Fan, Auteur ; Zhengfeng Jia, Auteur ; Mouyong Teng, Auteur |
| Année de publication : |
2022 |
| Article en page(s) : |
p. 1199-1209 |
| Note générale : |
Bibliogr. |
| Langues : |
Américain (ame) |
| Catégories : |
Alginate de sodium L'alginate de sodium ou polymannuronate sodique, de formule NaC6H7O6 est un additif alimentaire (E401) utilisé dans les boissons, constitué d’alginate et de sodium. Il se présente sous forme de poudre blanche à blanc crème, inodore et sans saveur, très soluble dans l'eau. C'est une longue molécule extraite d'algues brunes, constituée d'unités de glucides reliées ensemble pour former une chaîne.
Caractérisation
Dioxyde de silicium
Mouillage (chimie des surfaces)
Nanoparticules
Résistance à l'abrasion
Revêtements anti-buée
|
| Index. décimale : |
667.9 Revêtements et enduits |
| Résumé : |
In order to eliminate the effects caused by fog, sodium alginate (SA)/nano-SiO2 antifogging coating was prepared by solution blending method. The effects of coating components on its wettability and antifogging effects were investigated. Importantly, a method for evaluating the antifogging properties of membrane was developed, namely wet and dry cycles (WDC). It was found that the higher the content of nano-SiO2, the lower the contact angle of the coating, and the best antifogging effect was achieved. When the ratio of SA and nano-SiO2 was 4:3, the antifogging duration could be more than 144 h under water mist at 60°C. The antifogging coating retains antifogging effect after 10 cycles of test. However, after 20 cycles of WDC, a small amount of fine droplets started to appear, and XPS energy spectrum analysis found that the SA component in the coating almost completely disappeared, indicating that SA is the main reason for preserving antifogging performance under WDC conditions. Interestingly, after 20 cycles of reciprocal rubbing of the coating with a sponge, the surface contact angle rose by 23.4° and still had antifogging effect, indicating that the coating has excellent mechanical strength. |
| Note de contenu : |
- EXPERIMENTAL SECTION : Materials - Preparation - Characterization
- RESULTS AND DISCUSSION : Infrared spectral analysis - Surface morphology - Surface wettability - Antifogging test - WDC and abrasion resistance test - X-ray photoelectron spectroscopy - Effect of WDC and friction experiments on wettability
- Table 1 : Mass ratio of SA and SiO2 in the antifogging coating
- Table 2: Assignments of FTIR absorption bands of antifogging films
- Table 3 : Summary of XPS measurements |
| DOI : |
https://doi.org/10.1007/s11998-021-00601-x |
| En ligne : |
https://link.springer.com/content/pdf/10.1007/s11998-021-00601-x.pdf |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=38047 |
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 19, N° 4 (07/2022) . - p. 1199-1209
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Study on surface wetting property regulation of greenhouse film and its antifogging performance in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 19, N° 4 (07/2022)
