Open Access

ARTICLE

Fabrication and Mechanical, Dielectric and Optical Properties of Cellulose Paper Embedded with SrAl₂O₄:Eu,Dy Phosphor

Vitalii Chornii^1,2,*, Serhii G. Nedilko¹, Maxim Lazarenko¹, Oleksandr Alekseev¹, Mariia Sosnovs’ka¹, Valerii Barbash³, Olga Yashchenko³, Syed Shabhi Haider⁴, Yaroslav Zhydachevskyy⁴, Andrzej Suchocki⁴

1 Taras Shevchenko National University of Kyiv, Kyiv, 01601, Ukraine
2 National University of Life and Environmental Sciences of Ukraine, Kyiv, 03041, Ukraine
3 National Technical University of Ukraine “Igor Sikorsky Kyiv Polytechnic Institute”, Kyiv, 03056, Ukraine
4 Institute of Physics Polish Academy of Sciences, Warsaw, 02-668, Poland

* Corresponding Author: Vitalii Chornii. Email:

Journal of Renewable Materials 2025, 13(4), 653-668. https://doi.org/10.32604/jrm.2025.058211

Received 07 September 2024; Accepted 31 December 2024; Issue published 21 April 2025

Abstract

The work deals with cellulose paper filled with nanocellulose and SrAl₂O₄:Eu,Dy oxide phosphor. It was found that both nanocellulose and oxide improve the tensile strength of the composites obtained. The samples with the oxide demonstrate a long-lasting photoluminescence (PL) under sunlight and ultra-violet (UV) illumination. Room-temperature the PL spectra reveal a wide multicomponent band spreading over all the visible spectral regions. The short-wavelength part of the band is ascribed to the cellulose-related luminescence, while the long-wavelength PL component with maxima near 540 nm corresponds to the luminescence of the SrAl₂O₄:Eu,Dy phosphor. The dependency of the PL intensity on oxide concentration suggests the reabsorption of cellulose emission by the oxide and vice versa. The study of the dielectric properties of composite papers shows the presence of dielectric relaxations at low temperatures (T ~−50°C). Similar cellulose materials to those studied can be considered as alternatives for artificial petroleum-based polymers. Low cost, eco-friendliness, biocompatibility, and the simplicity of recycling are among the main advantages of these materials. They are produced from the cellulose which is one of the most abundant renewable materials in nature. The data on the mechanical, dielectric, and optical properties indicate that the papers studied can be used in flexible lighting devices, WLEDs, coating, markers, labels, etc.

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