RT Journal Article
T1 Synergies between fibrillated nanocellulose and hot-pressing of papers obtained from high-yield pulp
A1 Negro Álvarez, Carlos Manuel
A1 Pettersson, Gunilla
A1 Mattsson, Amanda
A1 Nyström, Staffan
A1 Sánchez Salvador, José Luis
A1 Blanco Suárez, María Ángeles
A1 Engstrand, Per
AB To extend the application of cost-effective high-yield pulps in packaging, strength and barrier properties are improved by advanced-strength additives or by hot-pressing. The aim of this study is to assess the synergic effects between the two approaches by using nanocellulose as a bulk additive, and by hot-pressing technology. Due to the synergic effect, dry strength increases by 118% while individual improvements are 31% by nanocellulose and 92% by hot-pressing. This effect is higher for mechanical fibrillated cellulose. After hot-pressing, all papers retain more than 22% of their dry strength. Hot-pressing greatly increases the paper’s ability to withstand compressive forces applied in short periods of time by 84%, with a further 30% increase due to the synergic effect of the fibrillated nanocellulose. Hot-pressing and the fibrillated cellulose greatly decrease air permeability (80% and 68%, respectively) for refining pretreated samples, due to the increased fiber flexibility, which increase up to 90% using the combined effect. The tear index increases with the addition of nanocellulose, but this effect is lost after hot-pressing. In general, fibrillation degree has a small effect which means that low- cost nanocellulose could be used in hot-pressed papers, providing products with a good strength and barrier capacity.
PB MDPI
YR 2023
FD 2023-06-25
LK https://hdl.handle.net/20.500.14352/104080
UL https://hdl.handle.net/20.500.14352/104080
LA eng
NO Negro, C.; Pettersson, G.; Mattsson, A.; Nyström, S.; Sanchez-Salvador, J.L.; Blanco, A.; Engstrand, P. Synergies between Fibrillated Nanocellulose and Hot-Pressing of Papers Obtained from High-Yield Pulp. Nanomaterials 2023, 13, 1931. https://doi.org/10.3390/nano13131931
NO 2023 Descuentos MDPI
NO Ministerio de Ciencia, Innovación y Universidades (España)
NO Familjen Kamprads Stiftelse (Suecia)
DS Docta Complutense
RD 23 jul 2024