Modification of halloysite nanotubes with xanthene dyes and their application in luminescent polymer nanocomposites
| Autor: | Piotr Bartczak, Qadeer Alam, Tuula T. Pakkanen, Mika Suvanto, Hanna Paananen |
|---|---|
| Přispěvatelé: | Building Materials |
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Materials science
Polymer nanocomposite Luminescent polymers Biophysics Organic dyes 02 engineering and technology engineering.material 010402 general chemistry 01 natural sciences Biochemistry Halloysite Rhodamines Rhodamine 6G chemistry.chemical_compound Rhodamine B Photoluminescence chemistry.chemical_classification Xanthene Halloysite nanotubes General Chemistry Polymer 021001 nanoscience & nanotechnology Condensed Matter Physics Atomic and Molecular Physics and Optics 0104 chemical sciences chemistry Chemical engineering engineering Polystyrene nanocomposites Polystyrene 0210 nano-technology |
| Zdroj: | Journal of Luminescence, 221:117096. Elsevier |
| ISSN: | 0022-2313 |
| Popis: | In this study, halloysite nanotubes (HNTs) were modified with three xanthene dyes and subsequently utilized for the fabrication of luminescent polymer nanocomposites. Two different sets of dyes (rhodamine B, rhodamine 6G, and fluorescein) were chosen because of their ability to interact differently with HNTs. Rhodamines B and 6G were adsorbed on the negatively charged external surface of HNTs due to their cationic nature, while fluorescein was infiltrated into the positively charged nano-size lumen of HNTs. The influence of the HNTs substrate on photoluminescence (PL) of the dyes in the polystyrene matrix was investigated. An enhancement in the PL intensity of fluorescein by a factor of 8 was observed upon its encapsulation into lumens of HNTs. On the other hand, the adsorption of rhodamines on HNTs led to a decrease in their PL intensity. A homogenous dispersion of the dye molecules achieved at nanoscale introduced luminescence properties in the polymer nanocomposites. The robust protocol for the modification of halloysites with organic chromophores provides a straightforward way to distribute the dye molecules in a polymer matrix and to incorporate luminescent properties into different polymer matrices. |
| Databáze: | OpenAIRE |
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