Comparison Of Mechanical And Chemical Nanocellulose As Additives To Reinforce Recycled Cardboard



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Sánchez Salvador, José Luis and Balea Martín, Ana and Monte Lara, M. Concepción and Negro Álvarez, Carlos Manuel and Miller, Meaghan and Olson, James and Blanco Suárez, Ángeles (2020) Comparison Of Mechanical And Chemical Nanocellulose As Additives To Reinforce Recycled Cardboard. Scientific Reports, 10 (3778). ISSN 2045-2322

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Recycling cycles cause a decrease in mechanical paper properties due to cellulose fiber degradation. The use of cellulose micro/nanofibers (CMF/CNF) to reinforce paper strength has been well studied, although it has been found to have negative effects on drainage. However, the application of CMF/CNF as paper reinforcement is affected by the nanocellulose type. Thus in this study mechanical and chemical treatments in CNF production were compared. Old corrugated container (OCC) pulp used to produce recycled cartonboard was reinforced with 1) CMF from never-dried northern bleached softwood kraft pulp (NBSK) highly refined in a 16-inch low consistency refiner at 1200 rpm and 25 kW of net power; and 2) CNF from NBSK pulp treated by TEMPO-mediated oxidation and homogenization at 600 bars. CMF/CNF and OCC were pulped at the same time and handsheets formed with cationic starch (CS) as retention system. Mechanical, drainage and flocculation properties were evaluated and compared. Data were also compared with other sources of TEMPO CNF. Results show an improvement in mechanical properties, drainage and flocculation when OCC is reinforced with CMF obtained with LCR. Therefore, high fibrillation was not necessary to improve mechanical paper or cardboard properties.

Item Type:Article
Subjects:Sciences > Chemistry > Paper industry
Sciences > Chemistry > Chemical engineering
ID Code:72942
Deposited On:17 Jun 2022 08:31
Last Modified:17 Jun 2022 10:36

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