Swelling of individual cellulose nanofibrils in water, role of crystallinity: an AFM study
2021 (Engelska)Ingår i: Cellulose, ISSN 0969-0239, E-ISSN 1572-882X, Vol. 28, s. 19-29Artikel i tidskrift (Refereegranskat) Published
Abstract [en]
Abstract: Atomic force microscopy (AFM) can be used to quantitatively study nanomaterials in different media, e.g. vacuum, air, or submerged in a liquid.A technique was developed to study swelling of individual cellulose nanofibrils (CNFs) using AFM.As a case study, CNFs with different degrees of crystallinity (DoC) were examined for swellability going from dry to wet (submerged in de-ionized water). Swelling was found to depend on DoC, but no significant correlation between fibril diameter and swellability was seen. Upon introduction of de-ionized water high DoC samples (65 ± 2 %) were found to have a diameter increase of 34% on average, whereas low DoC (44 ± 2 %) were found to have a diameter increase of 44% on average. A tested control, consisting of platinum nanowires on silisium, did not swell. Graphic abstract: [Figure not available: see fulltext.] © 2020, The Author(s).
Ort, förlag, år, upplaga, sidor
Springer Science and Business Media B.V. , 2021. Vol. 28, s. 19-29
Nyckelord [en]
AFM, Cellulose nanofibrils, Swelling, Atomic force microscopy, Cellulose, Cellulose nanocrystals, Crystallinity, Ionization, Nanofibers, AFM studies, Cellulose nanofibrils (CNFs), Degrees of crystallinity, Fibril diameters, Platinum nanowires, Swellability
Nationell ämneskategori
Naturvetenskap
Identifikatorer
URN: urn:nbn:se:ri:diva-50308DOI: 10.1007/s10570-020-03517-8Scopus ID: 2-s2.0-85092633547OAI: oai:DiVA.org:ri-50308DiVA, id: diva2:1498732
Anmärkning
Funding details: Norges Teknisk-Naturvitenskapelige Universitet, NTNU; Funding details: Norges Forskningsråd, 245963/F50; Funding text 1: Cotton linter used in the experiments was provided by Celsur, Spain. Mechanical fibrillation of cotton linter was performed at RISE PFI. The Research Council of Norway is acknowledged for the support to the Norwegian Micro- and Nano-Fabrication Facility, NorFab, Project Number 245963/F50. Further funding from Dept. of chemical engineering, Norwegian University of Science and Technology (NTNU). Thanks are also extended to the community at stackexchange.com for coding advice and useful examples.
2020-11-052020-11-052025-09-23Bibliografiskt granskad