Interaction of photoswitchable nanoparticles with cellulosic materials for anticounterfeiting and authentication security documents.
Carbohydr Polym
; 230: 115603, 2020 Feb 15.
Article
em En
| MEDLINE
| ID: mdl-31887950
ABSTRACT
Invisible high-security anticounterfeiting inks were developed by surface-modification of functionalized latex nanoparticles with spiropyran derivatives, which display both photochromism and fluorescence upon UV irradiation at the same time. The functionalized latex nanoparticles show different spherical, doughnut-like, and red blood cell-like morphologies depending on concentration and type of its functional groups. Microscopic investigation of the impregnated cellulosic papers with latex nanoparticles display that epoxy-functionalized spherical latex nanoparticles have considerable packing and stability on the surface of the cellulosic substrate by formation of hydrogen bonding. Epoxy-functionalized latex nanoparticles containing spiropyran were used for preparation of high-security photochromic/fluorescent anticounterfeiting inks for print-marking of different cellulosic security documents such as certificate, money, and passport with different marks. The printed marks and finger-prints on the cellulosic security documents display photochromism and red fluorescence emission upon UV irradiation with high intensity and brightness.
Palavras-chave
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Papel
/
Impressão
/
Celulose
/
Nanopartículas
/
Polímeros Responsivos a Estímulos
Idioma:
En
Revista:
Carbohydr Polym
Ano de publicação:
2020
Tipo de documento:
Article
País de afiliação:
Irã