Journal
FOOD PACKAGING AND SHELF LIFE
Volume 24, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.fpsl.2020.100480
Keywords
Starch; Pea protein; Edible film; Food packaging; Lipid oxidation; Blown-film extrusion
Categories
Funding
- Graduate Program Scholarship from the Graduate School, Kasetsart University
- Kasetsart University Research and Development Institute (KURDI)
Ask authors/readers for more resources
Starch can be commercially prepared into edible and biodegradable packaging via plasticization and extrusion. However, plasticized starch has poor stability in blown-film extrusion processability and storage properties which can be improved by combinations with protein. Edible films were developed from acetylated cassava starch (AS) and pea protein isolate (PI) using conventional blown-film extrusion. Films with PI up to 20 % were determined for physical, thermal and barrier properties and stability for oil packaging. PI stabilized films during blown-extrusion but decreased flexibility due to strong inter- and intra-molecular interaction with non-homogeneity of AS-PI blend matrices. Protein dispersed in AS matrices at low PI and formed continuous networks at 20 % which led to increased tensile strength. Increase in PI decreased solubility and light transmission but increased protein aggregation and improved crystallinity, surface hydrophobicity and barrier properties against water vapor and oxygen. Increase in PI also reduced glass transition and relaxation temperatures of AS-PI blends. Heat-sealed AS and AS-PI sachets showed effective protection for soybean and olive oil stored for 3 months at different humidities. PI blending effectively prevented humidity-induced shrinkage of AS film (up to 55 %) and enhanced polymer-glycerol interaction which improved thermal stability. Blending of starch and plant-derived pea protein effectively improved blown-film processability and barrier properties for oil-based food products.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available