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Unusual extraction and characterization of nanocrystalline cellulose from cellulose derivatives
University of Coimbra, Department of Chemistry, Coimbra, Portugal .
Faculty of Sciences and Technology, Centre for Mediterranean Bioresources and Food, University of Algarve, Ed. 8, Campus de Gambelas, Faro, Portugal .
University of Coimbra, Department of Chemistry, Coimbra, Portugal .
IFIMUP and in - Institute of Nanoscience and Nanotechnology, Department of Physics and Astronomy, Faculty of Science, University of Porto, Porto, Portugal .
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2015 (Engelska)Ingår i: Journal of Molecular Liquids, ISSN 0167-7322, E-ISSN 1873-3166, Vol. 210, s. 106-112Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

Unlike many nanomaterials, nanocrystalline cellulose (CNC) is not synthesized from molecular or atomic components but rather extracted from naturally occurring cellulose. Undoubtedly, the exploitation of CNCs will become a bridge between nanoscience and natural resource products, which could play a major role in reviving the forest industry. In this work, CNC was successfully extracted from unusual sources, hydroxypropyl methylcellulose (HPMC) and carboxymethylcellulose (CMC). The extracted crystallites were purified and further characterized by Fourier transform infrared (FTIR), scanning electron microscopy (SEM), X-ray powder diffraction (XRD) and dynamic light scattering (DLS). The average size of the CNCs extracted from HPMC and CMC was found to be less (and with lower zeta potential) than the ones extracted from microcrystalline cellulose (MCC). On the other hand, FTIR and XRD revealed that native HPMC and CMC are unexpectedly highly crystalline and hence can be used as a source for CNCs. © 2014 Elsevier B.V.All rights reserved.

Ort, förlag, år, upplaga, sidor
2015. Vol. 210, s. 106-112
Nyckelord [en]
Carboxymethyl cellulose, Cellulose derivatives, Hydroxypropyl methylcellulose, Nanocrystals
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URN: urn:nbn:se:miun:diva-25931DOI: 10.1016/j.molliq.2014.12.010ISI: 000363346700013Scopus ID: 2-s2.0-84941420154OAI: oai:DiVA.org:miun-25931DiVA, id: diva2:856184
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Tillgänglig från: 2015-09-23 Skapad: 2015-09-23 Senast uppdaterad: 2017-12-01Bibliografiskt granskad

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