The influence of temperature on cellulose swelling at constant water densityVise andre og tillknytning
2022 (engelsk)Inngår i: Scientific Reports, E-ISSN 2045-2322, Vol. 12, nr 1, artikkel-id 20736
Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]
We have in this paper investigated how water sorbs to cellulose. We found that both cellulose nanofibril (CNF) and cellulose nanocrystal (CNC) films swell similarly, as they are both mainly composed of cellulose. CNF/CNC films subjected to water at 0.018 kg/m3 at 25 °C and 39 °C, showed a decrease in swelling from ~ 8 to 2%. This deswelling increased the tensile index of CNF-films by ~ 13%. By molecular modeling of fibril swelling, we found that water sorbed to cellulose exhibits a decreased diffusion constant compared to bulk water. We quantified this change and showed that diffusion of sorbed water displays less dependency on swelling temperature compared to bulk water diffusion. To our knowledge, this has not previously been demonstrated by molecular modeling. The difference between bulk water diffusion (DWW) and diffusion of water sorbed to cellulose (DCC) increased from DWW − DCC ~ 3 × 10–5 cm/s2 at 25 °C to DWW − DCC ~ 8.3 × 10–5 cm/s2 at 100 °C. Moreover, water molecules spent less successive time sorbed to a fibril at higher temperatures. © 2022, The Author(s).
sted, utgiver, år, opplag, sider
Nature Research , 2022. Vol. 12, nr 1, artikkel-id 20736
Emneord [en]
cellulose, water, diffusion, edema, human, temperature, Humans
HSV kategori
Identifikatorer
URN: urn:nbn:se:ri:diva-61540DOI: 10.1038/s41598-022-22092-5Scopus ID: 2-s2.0-85143183851OAI: oai:DiVA.org:ri-61540DiVA, id: diva2:1720382
Merknad
Funding details: 274975; Funding details: NN9718k; Funding details: Norges Forskningsråd, 245963/F50; Funding text 1: The molecular dynamics simulations were performed on resources provided by UNINETT Sigma2—the National Infrastructure for High-Performance Computing and Data Storage in Norway, project number NN9718k. Johnny K. Melbø and Kenneth Aasarød (RISE PFI) are acknowledged for being extremely helpful with the lab work. The Research Council of Norway is acknowledged for supporting the Norwegian Micro- and Nano-Fabrication Facility, NorFab, project number 245963/F50. We greatly acknowledge the Research Counsel of Norway and their funding of the NanoPlasma project (274975). The cotton linters used in the experiments were provided by Celsur, Spain. Mechanical fibrillation of cotton linter was performed at RISE-PFI.; Funding text 2: The molecular dynamics simulations were performed on resources provided by UNINETT Sigma2—the National Infrastructure for High-Performance Computing and Data Storage in Norway, project number NN9718k. Johnny K. Melbø and Kenneth Aasarød (RISE PFI) are acknowledged for being extremely helpful with the lab work. The Research Council of Norway is acknowledged for supporting the Norwegian Micro- and Nano-Fabrication Facility, NorFab, project number 245963/F50. We greatly acknowledge the Research Counsel of Norway and their funding of the NanoPlasma project (274975). The cotton linters used in the experiments were provided by Celsur, Spain. Mechanical fibrillation of cotton linter was performed at RISE-PFI.
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