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Influence of Starch and Glycerol on the Properties of
Chitosan by Positron Annihilation Spectroscopy
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Abstract: Two types of chitosan (CS), a and b, were
blended with different concentrations of starch and cast to
obtain films. The addition of 1% glycerol was used as a
plasticizer to increase film flexibility. The properties of the
obtained films were studied by positron annihilation lifetime
spectroscopy, X-ray diffraction, and scanning electron
microscopy. The results indicate that pure b-CS had
smaller size free-volume holes with high fractions than
pure a-CS; this was attributed to the difference in bonding
of main chains in b-CS. The addition of starch (>20% up
to 50%) reduced the size of the free-volume holes and
increased their fraction because of the close packing of
chain segments. The effect of 1% glycerol to the CS starch
blends indicated that some modification took place
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| Publication year |
2009
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| Pages |
2874–2883
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| Author(s) from ARC |
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| Publication Type |
Journal
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