| Titre : |
Pistachio shell-derived carbon dots and their screen-printing formulation for anticounterfeiting applications |
| Type de document : |
texte imprimé |
| Auteurs : |
H. D. Chinmayi, Auteur ; Namratha Ullal, Auteur ; Dhanya Sunil, Auteur ; Suresh D. Kulkarni, Auteur ; P. J. Anand, Auteur ; K. Udaya Bhat, Auteur |
| Année de publication : |
2024 |
| Article en page(s) : |
p. 1321-1332 |
| Note générale : |
Bibliogr. |
| Langues : |
Américain (ame) |
| Catégories : |
Carbone
Contrefaçon -- Lutte contre
Coque de pistache
Encre en phase aqueuse
Fluorescence
Formulation (Génie chimique)
Séparation (technologie)
Sérigraphie
|
| Index. décimale : |
667.9 Revêtements et enduits |
| Résumé : |
In synergy with constructing a sustainable environment, facile reuse of carbon-rich biowastes as inexpensive precursors for the synthesis of value-added functional carbon dots (CDs) has garnered fruitful outcomes. Pistachio shells comprising cellulose, hemicellulose, and lignin were successfully utilized as a carbon source for the synthesis of CDs through carbonization and subsequent hydrothermal method. The methanolic fraction with desirable fluorescence in the visible region obtained after column purification of CDs was further characterized using TEM, EDS, SAED, FTIR, XPS, RS, XRD, and TCSPC techniques. The blue and green emitting CDs were used as colorants to prepare a water-based ink for screen printing. The screen prints on UV dull paper substrate exhibited good colorimetric and density values. The UV-induced yellow fluorescence of the ink film can be used as a security feature to authenticate genuine document/products and data storage. |
| Note de contenu : |
- EXPERIMENTAL : Synthesis of CDs - Purification of CDs - Characterization of CDs - Preparation of security ink - Study of print properties
- RESULTS AND DISCUSSION : Synthesis and purification of CDs - Characterization of CDs - Water-based ink formulation and study of print features - CDs incorporated formulation for security printing
- Table 1 : Security ink formulation of pistachio shell-derived CDs
- Table 2 : Lifetime values of CDs with their average lifetime values for different excitations and respective emissions
- Table 3 : The colorimetric and densitometric values for the paper samples |
| DOI : |
https://doi.org/10.1007/s11998-02667.93-00894-0 |
| En ligne : |
https://drive.google.com/file/d/1MRu2ElG8wDzo_dAw4QD-AmnxP9H_DJl4/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=41300 |
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 21, N° 4 (07/2024) . - p. 1321-1332
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