期刊
CARBOHYDRATE POLYMERS
卷 186, 期 -, 页码 64-72出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.carbpol.2018.01.024
关键词
Maranta arundinaceae; Packing; X-ray diffraction; Thermogravimetry; Tensile strength; Water solubility
资金
- Coordenacao de Aperfeicoamento de Pessoal de Nivel superior (CAPES)
- Faculty of Agricultural Engineering-University of Campinas
This research work aimed extraction and characterization of arrowroot starch. Besides, the effects of different concentrations of starch (2.59-5.41%, mass/mass) and concentrations of glycerol (9.95-24.08%, mass versus starch mass) on films properties were evaluated by a rotational central composite 2(2) experimental design. Arrowroot starch showed high amylose content (35%). Low values were found for the swelling power and solubility index. The X-ray diffraction showed C type crystalline structures, while thermogram showed Tg around of 118 and 120 degrees C. The thermogravimetric analysis showed that 40% of mass loss of starch occurred between 330 and 410 degrees C. The films were homogeneous, transparent and manageable. Starch and glycerol concentrations played a significant role in thickness and solubility in water of films, but was not significant for water vapor permeability and tensile strength. Therefore, arrowroot is a very promising starch source for application in films.
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