Titre : |
Effect of carboxyl on wettability and anti-fingerprint capacity of transparent chitin nanofiber coatings modified using fluorosilane |
Type de document : |
texte imprimé |
Auteurs : |
Peizhuang Wang, Auteur ; Li Zhang, Auteur ; Zhiqing Hu, Auteur ; Jiaqi Shang, Auteur ; Jiang Zhou, Auteur |
Année de publication : |
2024 |
Article en page(s) : |
p. 1621-1634 |
Note générale : |
Bibliogr. |
Langues : |
Américain (ame) |
Catégories : |
Anhydride maléique Caractérisation Chitine Fluorosilane Groupement carboxyle Mouillabilité Nanofibres Oléophobie Propriétés anti-empreintes Revêtements organiques TransmittanceLa transmittance, en général, est le rapport caractérisant la transmission d'une grandeur dans un système. Elle se calcule par le rapport entre la grandeur en entrée et en sortie.
En optique, la transmittance d'un matériau ou d'un filtre est la fraction du flux lumineux le traversant. Elle est également nommée facteur de transmission mais aussi transparence dans le domaine de la photographie. Transparence (optique)
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Index. décimale : |
667.9 Revêtements et enduits |
Résumé : |
Chitin nanofibers (ChNFs) with different numbers of carboxyls (i.e., with different degree of substitute, DS) were prepared by adjusting the amount of maleic anhydride used in the acylation treatment prior to mechanical nanofibrillation with ultrasound. Transparent coatings were fabricated by using the obtained ChNFs through casting method and modified via vapor deposition by using 1H, 1H, 2H, 2H-perfluorodecyltrichlorosilane (PFDTS). Hydro-oleophobicity and anti-fingerprint capacity of the ChNF coatings were studied. It was found that the ChNF coatings with more carboxyls possessed stronger hydro-oleophobicity as well as anti-fingerprint capacity after the modification of PFDTS deposition. Analysis of X-ray photoelectron spectroscopy suggested that more PFDTS molecules were grafted onto the ChNF coating surface when the ChNFs had more carboxyls (with higher DS). It is the number of carboxyls rather than hydroxyls on ChNF coating surface that determines hydro-oleophobicity and anti-fingerprint capacity of the ChNF coating surface after the modification of the PFDTS deposition. |
Note de contenu : |
- MATERIALS AND METHODS :
- Materials
- Maleic anhydride monoacylated chitin
- Preparation of ChNFs
- Preparation of partially deacetylated ChNFs
- Fabrication and surface modification of ChNF coatings
- Determination of DS in ChNFs
- Analysis of size distribution and zeta potential
- Transmittance of ChNF coatings
- Surface morphology of ChNF coatings
- Wettability of coating surface
- Charaterization of anti-fingerprint capacity
- Attenuated total reflectance-FTIR analysis
- X-ray photoelectron spectroscopy (XPS) analysis
- RESULTS AND DISCUSSION :
- Carboxyl content and DS of the ChNFs
- Size distribution and zeta potential of ChNFs
- Transmittance of ChNF coatings
- Wetting behavior of ChNF coatings
- Anti-fingerprint capacity of ChNF coatings
- Reaction of PFDTS at surface of ChNF coatings |
DOI : |
https://doi.org/10.1007/s11998-024-00920-9 |
En ligne : |
https://drive.google.com/file/d/19VxrdZCbAYUOTuiAGJaCYEbBZz7hBC7s/view?usp=drive [...] |
Format de la ressource électronique : |
Pdf |
Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=41515 |
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 21, N° 5 (09/2024) . - p. 1621-1634