20.500.12556/RUL-158308 Rheological study of hybrid aqueous suspension of TEMPO-oxidized cellulose nanofibrils and graphene oxide The incorporation of graphene oxide (GO) into a nanocellulose matrix has attracted considerable attention due to the unique advantages of both components. This study focuses on investigating the viscoelastic and flow properties of hybrid aqueous suspensions (2.00 w/v%), composed of TEMPO-oxidized cellulose nanofibrils (TOCNF) and GO at different TOCNF/GO weight ratios. To adjust the elastic properties of the hybrid suspensions, calcium ions are introduced, varying the concentration systematically to study their effects on the hybrid network structure. All blends exhibit shear-thinning behaviour and demonstrate elastic, gel-like properties. Notably, in the absence of calcium ions, the enhancement of elastic properties is more pronounced at higher GO fractions. Conversely, with the introduction of calcium ions, the enhancement of elastic properties becomes particularly important at higher TOCNF fractions. For the quantitative evaluation of these enhancements, we employ the logarithmic mixing rule. Significant positive deviations from the predictions of the logarithmic mixing rule are ascribed to the complex, concentration-dependent arrangement of cellulose nanofibrils and GO liquid crystals in the aqueous suspension, coupled with ionic crosslinking induced by calcium ions. The study aims to contribute to the understanding of the rheological behaviour of the TOCNF/GO hydrogel, showing potential advancements in various applications. TEMPO-oxidized cellulose nanofibrils graphene oxide blending effect calcium ions hydrogel rheology TEMPO-oksidirana celulozna nanovlakna grafen oksid efekt mešanja kalcijevi ioni hidrogel reologija true false true Angleški jezik Slovenski jezik Članek v reviji 2024-06-04 12:03:37 2024-06-04 12:03:38 2024-07-25 03:52:43 0000-00-00 00:00:00 2024 0 0 Str. 6105–6122 iss. 10 Vol. 31 2024 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 661.728:532.135 0969-0239 10.1007/s10570-024-05978-7 197573379 s10570-024-05978-7.pdf s10570-024-05978-7.pdf 1 29441CDCD88F535F006DC256DF6F3BF3 8774d85b11547343bda4e4f3277fca8e45284058035f0148ce6a999864d3bae8 bc826e98-4994-11ef-8f74-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=187968 https://link.springer.com/article/10.1007/s10570-024-05978-7 1 b7a98e51-2259-11ef-90a3-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=185861 Fakulteta za kemijo in kemijsko tehnologijo 0 0 0