Miscanthus Giganteus: A commercially viable sustainable source of cellulose nanocrystals.

Autor: Cudjoe E; Department of Macromolecular Science and Engineering, Case Western Reserve University, 2100 Adelbert Road, Cleveland, OH 44106, USA., Hunsen M; Department of Macromolecular Science and Engineering, Case Western Reserve University, 2100 Adelbert Road, Cleveland, OH 44106, USA; Department of Chemistry, Kenyon College, 101 Scott Lane, Gambier, OH 43022, USA., Xue Z; Department of Macromolecular Science and Engineering, Case Western Reserve University, 2100 Adelbert Road, Cleveland, OH 44106, USA., Way AE; Department of Macromolecular Science and Engineering, Case Western Reserve University, 2100 Adelbert Road, Cleveland, OH 44106, USA., Barrios E; Department of Macromolecular Science and Engineering, Case Western Reserve University, 2100 Adelbert Road, Cleveland, OH 44106, USA., Olson RA; Department of Macromolecular Science and Engineering, Case Western Reserve University, 2100 Adelbert Road, Cleveland, OH 44106, USA., Hore MJ; Department of Macromolecular Science and Engineering, Case Western Reserve University, 2100 Adelbert Road, Cleveland, OH 44106, USA., Rowan SJ; Department of Macromolecular Science and Engineering, Case Western Reserve University, 2100 Adelbert Road, Cleveland, OH 44106, USA; Institute for Molecular Engineering and Department of Chemistry, University of Chicago, 5640 S. Ellis Ave., Chicago, IL 60637, USA. Electronic address: stuartrowan@uchicago.edu.
Jazyk: angličtina
Zdroj: Carbohydrate polymers [Carbohydr Polym] 2017 Jan 02; Vol. 155, pp. 230-241. Date of Electronic Publication: 2016 Aug 20.
DOI: 10.1016/j.carbpol.2016.08.049
Abstrakt: With a goal of identifying a new scalable source for cellulose nanocrystals (CNCs), we successfully isolated CNCs from a sustainable, non-invasive grass, Miscanthus x. Giganteus (MxG). Subjecting MxG stalks to base hydrolysis, bleaching and acid hydrolysis allowed access to cellulose nanocrystals (MxG-CNC) in high yields. X-ray diffraction studies showed the crystallinity of the MxG-CNCs increased with subsequent treatment conditions (>90% after HCl hydrolysis). Transmission electron microscopy showed that the MxG-CNC exhibit relatively high aspect ratios (60-70), and small angle neutron scattering showed the crystals were ribbon-like with a width and thickness of 8.5 and 2.8nm respectively. As expected, thermomechanical analysis of nanocomposites fabricated with carboxylic acid functionalized MxG-CNC (MxG-CNC-COOH) and PVAc showed an increase in modulus (above T g ) as filler content was increased. Comparing the properties to PVAc nanocomposites containing CNCs from wood showed at least as good, if not slightly better, reinforcement at the same loading level.
(Copyright © 2016 Elsevier Ltd. All rights reserved.)
Databáze: MEDLINE
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