|
|
Influence of Starch and Glycerol on the Properties of
Chitosan by Positron Annihilation Spectroscopy
|
|
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 bondingof 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. VC 2010
Wiley Periodicals, Inc. J Appl Polym Sci 116: 2874–2883, 2010
Key words: films; biomaterials; biopolymers; blends;
microstructure
|
| Publication year |
2010
|
| Pages |
2874–2883
|
| Organization Name |
|
| serial title |
Journal ofAppliedPolymer Science,
|
| Author(s) from ARC |
|
| External authors (outside ARC) |
ماجدة عبد الوهاب
استاذ الفيزياء النوويه بكليه البنات جامعه عين شمس
|
| Publication Type |
Journal
|