Properties of extruded xanthan-starch-clay nanocomposite films
Braz. arch. biol. technol
; 54(6): 1223-1333, Nov.-Dec. 2011. ilus, graf, tab
Article
в En
| LILACS
| ID: lil-608445
Ответственная библиотека:
BR1.1
ABSTRACT
The aim of this work was to manufacture the biodegradable nanocomposite films by extrusion from different combinations of cassava starch, xanthan gum and nanoclays (sodium montmorillonite - MMT- Na) and to characterize them according to their microstructure, optical, mechanical and barrier properties. Films were manufactured from nine starch/xanthan/nanoclay combinations, containing glycerol as plasticizer. Scanning electron microscopy (SEM) of the starch-xanthan extruded films showed reticulated surface and smooth interior, indicating that the gum was mostly concentrated on the surface of the films, while starch/xanthan/nanoclays films showed a more homogeneous surface, suggesting that the introduction of nanoclays provided a better biopolymeric interaction. In general, nanoclays addition (2.5 - 5.0, w percent) generated more transparent and resistant films, with lower water vapor permeabilities and lower water sorption capacities and xanthan gum addition improved the elongation ofa starch films.
Полный текст:
1
База данных:
LILACS
Язык:
En
Журнал:
Braz. arch. biol. technol
Тематика журнала:
BIOLOGIA
Год:
2011
Тип:
Article
/
Project document