On the morphology of cellulose nanofibrils obtained by TEMPO-mediated oxidation and mechanical treatment

Micron : the International Research and Review Journal for Microscopy
José A F GamelasPaulo J T Ferreira

Abstract

The morphological properties of cellulose nanofibrils obtained from eucalyptus pulp fibres were assessed. Two samples were produced with the same chemical treatment (NaClO/NaBr/TEMPO (2,2,6,6-tetramethylpiperidine-1-oxyl radical) oxidation), but distinct mechanical treatment intensities during homogenization. It was shown that the nanofibrils production yield increases with the mechanical energy. The effect of mechanical treatment on the yield was confirmed by laser profilometry of air-dried nanocellulose films. However, no significant differences were detected regarding the nanofibrils width as measured by atomic force microscopy (AFM) of air-dried films. On the other hand, differences in size were found either by laser diffraction spectroscopy or by dynamic light scattering (DLS) of the cellulose nanofibrils suspensions as a consequence of the differences in the length distribution of both samples. The nanofibrils length of the more nanofibrillated sample was calculated based on the width measured by AFM and the hydrodynamic diameter obtained by DLS. A length value of ca. 600 nm was estimated. The DLS hydrodynamic diameter, as an equivalent spherical diameter, was used to estimate the nanofibrils length assuming a cylinder wi...Continue Reading

References

Jul 17, 2007·Biomacromolecules·Tsuguyuki SaitoAkira Isogai
Sep 6, 2007·Biomacromolecules·Kentaro AbeHiroyuki Yano
Jul 12, 2011·Microscopy and Microanalysis : the Official Journal of Microscopy Society of America, Microbeam Analysis Society, Microscopical Society of Canada·Gary Chinga-CarrascoOla Diserud
Apr 10, 2012·Biomacromolecules·Stephanie BeckRichard Berry
Mar 8, 2013·Carbohydrate Polymers·Hayaka FukuzumiAkira Isogai
Apr 10, 2014·Journal of Biomaterials Applications·Gary Chinga-Carrasco, Kristin Syverud

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Citations

Oct 2, 2015·Environmental Science & Technology·Marc Delgado-AguilarPere Fullana-I-Palmer
Mar 4, 2020·Current Medicinal Chemistry·Huayu LiuYoungsoo Bae
Aug 9, 2019·Advances in Colloid and Interface Science·L AlvesJ A F Gamelas
Sep 2, 2019·Carbohydrate Polymers·Ana F LourençoPaulo J T Ferreira
Jan 15, 2021·Polymers·Abdoulhdi A Borhana OmranMichal Petrů
Nov 5, 2020·Polymers·Birgitte Hjelmeland McDonagh, Gary Chinga-Carrasco

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