Unusual extraction and characterization of nanocrystalline cellulose from cellulose derivatives

• Type: Article in International Scientific Journal
• Date: 2015

Authors

Alves, L (Author) Other; Medronho, B (Author) Other; Antunes, FE (Author) Other; Fernandez Garcia, MP (Author) Other; ventura, j. (Author) FCUP; araujo, j. p. (Author) FCUP; Romano, A (Author) Other; Lindman, B (Author) Other

Journal

Title: Journal of Molecular Liquids

Vol. 210

Pages: 106-112

ISSN: 0167-7322

Publisher: Elsevier

Indexing

ISI Web of Knowledge - 27 Citations

Scopus - 30 Citations

Other information

Authenticus ID: P-00G-MQ5

DOI: 10.1016/j.molliq.2014.12.010

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.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 7