Cross-Sections of Nanocellulose from Wood Analyzed by Quantized Polydispersity of Elementary MicrofibrilsVisa övriga samt affilieringar
2020 (Engelska)Ingår i: ACS Nano, ISSN 1936-0851, E-ISSN 1936-086X, Vol. 14, nr 12, s. 16743-16754Artikel i tidskrift (Refereegranskat) Published
Abstract [en]
Bio-based nanocellulose has been shown to possess impressive mechanical properties and simplicity for chemical modifications. The chemical properties are largely influenced by the surface area and functionality of the nanoscale materials. However, finding the typical cross-sections of nanocellulose, such as cellulose nanofibers (CNFs), has been a long-standing puzzle, where subtle changes in extraction methods seem to yield different shapes and dimensions. Here, we extracted CNFs from wood with two different oxidation methods and variations in degree of oxidation and high-pressure homogenization. The cross-sections of CNFs were characterized by small-angle X-ray scattering and wide-angle X-ray diffraction in dispersed and freeze-dried states, respectively, where the results were analyzed by assuming that the cross-sectional distribution was quantized with an 18-chain elementary microfibril, the building block of the cell wall. We find that the results agree well with a pseudosquare unit having a size of about 2.4 nm regardless of sample, while the aggregate level strongly depends on the extraction conditions. Furthermore, we find that aggregates have a preferred cohesion of phase boundaries parallel to the (110)-plane of the cellulose fibril, leading to a ribbon shape on average.
Ort, förlag, år, upplaga, sidor
American Chemical Society , 2020. Vol. 14, nr 12, s. 16743-16754
Nyckelord [en]
biosynthesis, elementary microfibrils, nanocellulose, polydispersity, small-/wide-angle X-ray scattering, Aggregates, Cellulose, Cellulose nanocrystals, Chemical modification, Extraction, X ray scattering, Cellulose fibrils, Cellulose nanofibers, Cross-sectional distribution, Extraction conditions, Extraction method, High pressure homogenization, Nano-scale materials, Wide angle Xray diffraction
Nationell ämneskategori
Naturvetenskap
Identifikatorer
URN: urn:nbn:se:ri:diva-51469DOI: 10.1021/acsnano.0c04570Scopus ID: 2-s2.0-85097734035OAI: oai:DiVA.org:ri-51469DiVA, id: diva2:1516311
Anmärkning
Funding details: Landsteiner Foundation for Blood Transfusion Research, LSBR; Funding details: National Science Foundation, NSF, DMR-1808690; Funding details: U.S. Department of Energy, USDOE; Funding details: Horizon 2020 Framework Programme, H2020, 761000; Funding details: National Institutes of Health, NIH, S10 OD012331; Funding details: KP1605010; Funding details: Society for Cultural Anthropology, SCA; Funding details: Office of Science, SC; Funding details: DE-SC0012704; Funding details: Brookhaven National Laboratory, BNL; Funding details: National Institute of General Medical Sciences, NIGMS, P41 GM111244; Funding text 1: The authors acknowledge financial support from the DMR Polymer Program of the National Science Foundation (DMR-1808690), the Alf de Ruvo Foundation (SCA) and the Hans Werthén Foundation (IVA). Experimental assistance by S. Samadnouri, L. Yang and F. Camino is also greatly acknowledged along with helpful discussions with R. Joshi and D. Söderberg. The SAXS/WAXD experiments were performed at the LiX beamline (16-ID) in NSLS-II at Brookhaven National Laboratory, USA. The LiX beamline is part of the Life Science Biomedical Technology Research resource, primarily supported by the National Institute of Health, National Institute of General Medical Sciences (NIGMS) under grant P41 GM111244, and by the DOE Office of Biological and Environmental Research under grant KP1605010, with additional support from NIH under grant S10 OD012331. As a National Synchrotron Light Source II facility resource at Brookhaven National Laboratory, work performed at the LSBR is supported in part by the U.S. Department of Energy, Office of Basic Energy Sciences Program under contract number DE-SC0012704. Transmission electron microscopy (TEM) experiments were performed at the Center of Functional Nanomaterials, Brookhaven National Laboratory. The Center for Functional Nanomaterials, which is a U.S. DOE Office of Science Facility, at Brookhaven National Laboratory under Contract No. DE-SC0012704. This project has received funding from the European Union’s Horizon 2020 research and innovation programme under grant agreement No 761000. The publication reflects only the author’s view and the Commission is not responsible for any use that may be made of the information it contains.
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