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Morphology and properties of neutralized chitosan-cellulose nanocrystals biocomposite films

Morphology and properties of neutralized chitosan-cellulose nanocrystals biocomposite films

Carbohydrate Polymers 156: 452-459

Chitosan/cellulose nanocrystals (CH-CN) films were obtained by casting of dispersions, and treated with NaOH for neutralization proposes. The composition of films was varied from 1 to 10wt.% of CN. Changes in the morphology of the systems were correlated with the different properties studied. FTIR revealed the presence of a weak interaction between the polymer matrix and nanofiller, confirmed by a slightly increase in thermal stability. SEM images suggested that incorporating CN amounts higher than 3wt.% generates phase-segregated systems, and SAXS showed that CH avoid the typical organization of CN at concentrations below 5wt.%. Improved performance against water was obtained in composite materials comparing to the pure polymer matrix, as well as CH and CH-CN films did not show antibacterial activity demonstrating that remnant acetic acid, when no neutralization step is done, plays an important role in this property.

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Accession: 058349205

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PMID: 27842846

DOI: 10.1016/j.carbpol.2016.09.031

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