Study of the Change in Properties by Artificial Aging of Eco-Papers
Sevastyanova Y. Shcherbak N. Konshina K. Potashev A. Palchikova E. Makarov I. Kalimanova D. Sakipova L. Kareshova Z. Balabekova S. Shambilova G. Vinogradov M. Novikov E.
June 2025Multidisciplinary Digital Publishing Institute (MDPI)
Processes
2025#13Issue 6
This study analyzes the effect of artificial aging on the mechanical deformational and optical properties of various paper samples, which allows us to evaluate their durability and suitability for long-term storage. The methods of accelerated aging, measuring the breaking length, specific resistance, elongation, and fracture strength, were used, and the optical characteristics were estimated by the R457 and CIE whiteness indices, as well as opacity. Mechanical measurements (breaking length, specific resistance, elongation, and fracture strength) revealed that bleaching reduces residual lignin and strengthens interfiber bonds, boosting pine pulp strength by up to 8%. Optical properties initially improve slightly, then increase sharply after the second bleaching cycle and stabilize, while opacity decreases, providing greater light transmittance. After accelerated aging, the following deterioration is observed: for bleached samples, R457 whiteness changes; and for unbleached samples, CIE whiteness and opacity increase. After aging, aspen pulps and kraft papers retained over 90% of their initial strength and whiteness, whereas untreated and office papers lost up to 20–25%. These findings identify that aspen-based and kraft papers demonstrate better mechanical deformational and optical properties, which makes it possible to predict the operational characteristics of paper depending on the processing and aging methods used.
bleached chemical thermomechanical pulp , cellulose , eco paper , mechanical properties , optical properties , paper aging
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Federal State Autonomous Educational Institution of Higher Education “Northern (Arctic), Federal University Named After M.V. Lomonosov”, Severnaya Dvina Embankment, 17, Arkhangelsk, 163002, Russian Federation
A.V. Topchiev Institute of Petrochemical Synthesis, Russian Academy of Sciences, 29 Leninsky Prospect, Moscow, 119991, Russian Federation
Department of Chemistry and Chemical Technology, Kh. Dosmukhamedov Atyrau University, Studenchesky Ave., 1, Atyrau, 060011, Kazakhstan
Institute of Petrochemical Engineering and Ecology Named After N.K. Nadirov, Atyrau Oil and Gas University Named After S. Utebayev, M. Baimukhanov Street, Atyrau, 060027, Kazakhstan
Department of Chemistry, New Mexico Highlands University, Las Vegas, 87701, NM, United States
Federal State Autonomous Educational Institution of Higher Education “Northern (Arctic)
A.V. Topchiev Institute of Petrochemical Synthesis
Department of Chemistry and Chemical Technology
Institute of Petrochemical Engineering and Ecology Named After N.K. Nadirov
Department of Chemistry
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