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01.02.2013 | Original Paper

Sisal cellulose and its acetates: generation of films and reinforcement in a one-pot process

verfasst von: Erika V. R. Almeida, Daniella L. Morgado, Ludmila A. Ramos, Elisabete Frollini

Erschienen in: Cellulose | Ausgabe 1/2013

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Abstract

This study was undertaken to evaluate both the properties of cellulose acetate films as a function of their degree of substitution (DS) and the possibility of generating reinforcements during film preparation. Sisal was selected for the entire study, among other reasons, because it is a rapidly growing source of cellulose. Cellulose acetates with various DS values were prepared in a homogeneous medium (dimethylacetamide/lithium chloride as the solvent system) and characterized. In DMAc/LiCl, cellulose and cellulose acetate films (mixed or not mixed with sisal cellulose) were successfully prepared and characterized. The films with high DS values exhibited lower hygroscopicity, a distinct morphology (scanning electron microscopy images), and lower tensile strength. In some cases, the films prepared from acetates/cellulose exhibited higher tensile strength and/or storage modulus than the acetate films. This result suggested a reinforcing action of the auto-organized cellulose chains that enabled the generation of both a film and reinforcement in a one-pot process.

Vorheriger Artikel Thermomechanical and crystallization behavior of polylactide-based flax fiber biocomposites

Nächster Artikel Photo-attaching functional polymers to cellulose fibers for the design of chemically modified paper

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Titel: Sisal cellulose and its acetates: generation of films and reinforcement in a one-pot process
verfasst von: Erika V. R. Almeida
Daniella L. Morgado
Ludmila A. Ramos
Elisabete Frollini
Publikationsdatum: 01.02.2013
Verlag: Springer Netherlands
Erschienen in: Cellulose / Ausgabe 1/2013
Print ISSN: 0969-0239
Elektronische ISSN: 1572-882X
DOI: https://doi.org/10.1007/s10570-012-9802-5

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