Unusual extraction and characterization of nanocrystalline cellulose from cellulose derivatives

• Tipo: Artigo em Revista Científica Internacional
• Data: 2015

Autores

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

Revista

Título: Journal of Molecular Liquids

Vol. 210

Páginas: 106-112

ISSN: 0167-7322

Editora: Elsevier

Indexação

ISI Web of Knowledge - 27 Citações

Scopus - 30 Citações

Outras Informações

ID Authenticus: 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.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 7