Volume 21, Issue 157 (2025)
FSCT 2025, 21(157): 67-81 |
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nazarnezhad N, Parastar M. Production of test lines paper with occ modified fibers and sodium caseinate crosslinker. FSCT 2025; 21 (157) :67-81
URL: http://fsct.modares.ac.ir/article-7-73715-en.html
URL: http://fsct.modares.ac.ir/article-7-73715-en.html
1- Associate Professor of Wood Industry and Lignocellulosic Materials, Sari University of Agricultural Sciences and Natural Resources , nazarnezhad91@gmail.com
2- Ph.D. student of Sari Agriculture and Natural Resources University
2- Ph.D. student of Sari Agriculture and Natural Resources University
Abstract: (103 Views)
Currently, there is significant competition for recycling waste paper and using it to produce various types of paper used in the packaging industry. Recycled paper, due to the gradual shortening of fibers and the reduction of bonding properties, does not have good resistance. Given this challenge, in this study, after converting Old congressional cartons (occ) paper into pulp and then refining it, to create diversity and increase reactive groups at different percentages of 4, 3, 2, 1, 0.5%, and 0% by hydrogen peroxide were oxidized in an alkaline environment. Then, sodium caseinate was added as a sizing agent at levels of 5, 6, 7, 8, 9, 4, 3, 2, 1, 0.5% to the pulp suspension. Finally, standard handmade papers were prepared from them. The status of the formed functional groups was determined by FTIR spectra and the mechanical properties and water absorption of the produced papers were measured according to Standards of the Technical Association of the American Pulp and Paper Industry (TAPPI) standards. FTIR results showed that oxidized pulp samples had high absorption at the 1650 cm^-1 wave number, which corresponds to the carboxyl group. Also, the calculation of carboxyl groups by methylene blue adsorption method showed that the highest amount of carboxyl was in the 1% hydrogen peroxide treatment. By adding sodium caseinate to the pulp suspension, the mechanical properties of the resulting papers significantly increased.
Article Type: Original Research |
Subject:
Packing and all types of coatings in the food industry
Received: 2024/02/4 | Accepted: 2024/05/12 | Published: 2025/02/19
Received: 2024/02/4 | Accepted: 2024/05/12 | Published: 2025/02/19
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