Moisture Absorption Behavior and Morphology of Thermoplastic Starch via Ascorbic Acid Hydrolysis Technique

Abstract:

The effect of modified thermoplastic starch (TPS) with organic acid was studied. In presence of ascorbic acid (AATPS) and glycerol (GTPS) along with mechanical process, a native starch granule was transform into a continuous phase as shown by scanning electron microscopy (SEM). Reaction of ascorbic acid (AA) with starch induced to the formation of the ester bond, which improved moisture resistivity of TPS was proven by the determination degree of substitution (DS) and moisture absorption test. The formation of ester bond was identified by using FTIR analysis. The DS values were ranging from 0 to 0.052, respectively, with the increase of AA content.

• Periodical: Solid State Phenomena (Volume 264)
• Pages: 148-151
• DOI: https://doi.org/10.4028/www.scientific.net/SSP.264.148
• Online since: September 2017
• Authors: Amirah Hulwani Mohd Zain, Mohamad Kahar Ab Wahab*
• Keywords: Ascorbic Acid, Chemical-Mechanical Hydrolysis, Degree of Substitution

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