Physical Properties of Films Based on Gelatin and Dialdehyde Starch with Different Oxidation Degrees

In this study, dialdehyde starch (DAS) was prepared by oxidizing corn starch using potassium periodateas the oxidant.The aldehyde contentsin DAS weredetermined using titration with hydroxylamine and were found proportional to the molar ratio of KIO4:C6H10O5.Fourier transform infrared spectroscopy wa...

Full description

Saved in:
Bibliographic Details
Published in:Oriental journal of chemistry 2021-02, Vol.37 (1), p.103-108
Main Authors: Nguyet, Le Thi Bich, Nguyen, Vinh Tien
Format: Article
Language:English
Subjects:
Aldehydes
Biopolymers
Elongation
Fourier transforms
Gelatin
Glycerol
Mechanical properties
Moisture content
Moisture effects
Oxidation
Oxidizing agents
Physical properties
Ratios
Stability analysis
Tensile strength
Thermal stability
Thermogravimetric analysis
Titration
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:In this study, dialdehyde starch (DAS) was prepared by oxidizing corn starch using potassium periodateas the oxidant.The aldehyde contentsin DAS weredetermined using titration with hydroxylamine and were found proportional to the molar ratio of KIO4:C6H10O5.Fourier transform infrared spectroscopy was used to confirm the breakage of the bond between C2 and C3in anhydroglucose units and the formation of -CHO group in DAS. X-ray diffractometry showed a decrease in crystallinity of starch after periodate oxidation. Thermogravimetric analysis showed reduced thermal stability of DASin comparison with the native starch. The prepared DAS was blended with gelatin to form films by casting method. Increasing aldehyde contents in DAS from 0 to 12.2% resulted in decreased moisture contents, solubility in water, and the swelling capacity of gelatin-DAS films. The value of tensile strength and elongation at break of the gelatin-DAS films rose when the aldehyde content was low (0-3.5%), but declined when the aldehyde content was high (3.5-12.2%). Slight periodate oxidation is, therefore, an effective way to enhance the mechanical characteristics of blend films from DAS and other biopolymers.
ISSN:0970-020X
2231-5039
DOI:10.13005/ojc/370113