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Cellulose
Published in: Cellulose 4/2012

01-08-2012 | Original Paper

Superabsorbent hydrogel nanocomposites based on starch-g-poly(sodium acrylate) matrix filled with cellulose nanowhiskers

Authors: Cristiane Spagnol, Francisco H. A. Rodrigues, Antonio G. B. Pereira, André R. Fajardo, Adley F. Rubira, Edvani C. Muniz

Published in: Cellulose | Issue 4/2012

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Abstract

Superabsorbents hydrogel nanocomposites based on starch-g-poly(sodium acrylate) and cellulose nanowhiskers (CNWs) were synthesized. A set of experiments was performed to evaluate the influence of some factors such as NaAc/starch mass ratio, crosslinker, and nanowhiskers amount in the swelling capacity and swelling kinetics. Increasing the NaAc/starch mass ratio up to 7 leads to an increase in the water uptake at a maximum value, however, higher ratios decreased that value due to the increase of crosslinking points. Similarly, the incorporation of CNWs up to 10 wt% provided an improvement in the swelling due to the hydrophilic groups from cellobiose units. Further, the incorporation of CNWs diminishes the water uptake. Besides, the CNWs improved the mechanical properties. SEM images showed that CNWs increase the average porous size of composites. The composites presented good responsive behavior in relation to pH and salt presence allowing those materials suitable for many potential applications.
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Metadata
Title
Superabsorbent hydrogel nanocomposites based on starch-g-poly(sodium acrylate) matrix filled with cellulose nanowhiskers
Authors
Cristiane Spagnol
Francisco H. A. Rodrigues
Antonio G. B. Pereira
André R. Fajardo
Adley F. Rubira
Edvani C. Muniz
Publication date
01-08-2012
Publisher
Springer Netherlands
Published in
Cellulose / Issue 4/2012
Print ISSN: 0969-0239
Electronic ISSN: 1572-882X
DOI
https://doi.org/10.1007/s10570-012-9711-7

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