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Structure characterization of cellulose nanofiber hydrogel as functions of concentration and ionic strength
South China University of Technology, China ; Stony Brook University, US.
South China University of Technology, China.
Stony Brook University, US.
RISE - Research Institutes of Sweden, Bioeconomy. RISE, Innventia.
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2017 (English)In: Cellulose (London), ISSN 0969-0239, E-ISSN 1572-882XArticle in journal (Refereed) In press
Abstract [en]

Carboxylated cellulose nanofibers (CNFs), having an average width of 7 nm and thickness of 1.5 nm, were produced by TEMPO (2,2,6,6-tetramethylpiperidine-1-oxyl radical)-mediated oxidation method. The fiber cross-sectional dimensions were determined using small-angle X-ray scattering (SAXS), transmission electron microscopy and atomic force microscopy techniques, where the rheological properties under different concentration and ionic strength were also investigated. The formation of hydrogel was evidenced by increasing the CNF concentration or ionic strength of the solvent (water), while the gel structure in ion-induced CNF hydrogels was found to be relatively inhomogeneous. The gelation behavior was closely related to the segmental aggregation of charged CNF, which could be quantitatively characterized by the correlation length (Ο) from the low-angle scattering profile and the scattering invariant (Q) in SAXS.

Place, publisher, year, edition, pages
Springer Netherlands , 2017.
Keyword [en]
Cellulose nanofibers, Gelation, SAXS, Ionic strength
National Category
Paper, Pulp and Fiber Technology Nano Technology
Identifiers
URN: urn:nbn:se:ri:diva-31876DOI: 10.1007/s10570-017-1496-2Scopus ID: 2-s2.0-85030870061OAI: oai:DiVA.org:ri-31876DiVA, id: diva2:1150291
Available from: 2017-10-18 Created: 2017-10-18 Last updated: 2018-01-26Bibliographically approved

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