Evaluation of Modified Sorghum Starches and Biodegradable Films

  • Bijan Shrestha Department of Food Technology and Quality Control
  • Pramesh K Dhungana The University of Queensland
  • Sushil Dhital The University of Queensland
  • Babita Adhikari Central Campus of Technology, Dharan

Abstract

The properties of bio-films prepared from sorghum starch using three different modification techniques (hydrothermal treatment (HTT), acid-alcohol treatment (AA) and acetylation (A)) were studied. The physical properties of modified starches were significantly different from unmodified starches. More specifically, acetylated starch had significantly higher swelling power and solubility, where-as HHT starch had the highest water binding capacity. Starch films prepared from hydrothermal treatment had the least solubility (26.15%) and the maximum tensile strength (TS) - (6.50MPa), whereas films prepared from acid-alcohol treated starch had the lowest water vapour transmission rate (WVTR) (720.0 g/m2/d) and acetylated starch film had the maximum elongation (19.03%). The concentration of glycerol, a plasticising agent, affected the properties. The WVTR of the films increased with an increase in glycerol concentration; while tensile force and elongation decreased.

Downloads

Download data is not yet available.
Abstract
1940
PDF
301
Published
2018-06-30
How to Cite
Shrestha, B., Dhungana, P., Dhital, S., & Adhikari, B. (2018). Evaluation of Modified Sorghum Starches and Biodegradable Films. Journal of Food Science and Technology Nepal, 10, 11-17. https://doi.org/10.3126/jfstn.v10i0.14800
Section
Research Papers