| 초록 |
Starch is a promising eco-friendly packaging material in terms of film-forming performance, high oxygen barrier, low unit price, and high ink permeability. However, due to its vulnerability to moisture and inappropriate physical properties, more research is required. Starch substitution by short-chain fatty acid can provide hydrophobicity to starch molecules to overcome shortcoming of starch film. Accordingly, this study introduced a method for preparing hydrophobic starch using propionic anhydride and improved characteristics of starch films. Propylated starch (PA-CS) was prepared with corn starch and propionic anhydride at mild alkali conditions for 30 mins. Degree of substitution (0.07) and FT-IR spectra proved propylation of starch. PA-CS Film prepared by solvent casting method showed lower brittleness and opacity than control. In conclusion, suitable film for packaging material could be made with easy and green method. |
