Spectroscopic investigation of the constituent components effect on the biodegradable package characteristics

The effect of the nature and the content of the plasticizers (water, glycerol) on the corn starch based biodegradable packages properties (crystalline-amorphous) and also on their degradation process after absorption of distilled water were investigated by 1H NMR relaxation and 13C CP/MAS NMR spectr...

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Main Authors: Coţa, C., Cioica, N., Nagy, E. M., Filip, C., Fechete, R., Todica, M., Cozar, O., Academy of Romanian Scientists, 54 Splaiul Independentei, RO-050094, Bucharest
Format: Conference Proceeding
Language:English
Subjects:
ABSORPTION
AMORPHOUS STATE
Biodegradability
BIODEGRADATION
CARBON 13
CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS
Corn
Crystal structure
Crystallinity
CRYSTALS
Distilled water
EXTRUSION
GLYCEROL
HYDROGEN 1
Investigations
MASS
NMR SPECTRA
NMR spectroscopy
NUCLEAR MAGNETIC RESONANCE
PLASTICIZERS
RELAXATION
SPECTROSCOPY
STARCH
WATER
Water absorption
Water resistance
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Summary:The effect of the nature and the content of the plasticizers (water, glycerol) on the corn starch based biodegradable packages properties (crystalline-amorphous) and also on their degradation process after absorption of distilled water were investigated by 1H NMR relaxation and 13C CP/MAS NMR spectroscopies. For this goal, a set of 14 samples with various starch/glycerol/water (mass %) ratios were prepared and investigated after extrusion process in order to establish their crystalline or amorphous character. The composition having starch/glycerol/water 68/17/15 mass % ratio was found to have a dominant amorphous character and very similar features with a commercial specimen (USA) used for the package. It was also found that this best package is extremely degraded after just one day under water absorption. The most resistant package was that with a large content of starch (78/19.5/2.5).
ISSN:0094-243X
1551-7616
DOI:10.1063/1.4938437