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- Title
Nişasta Bazlı Köpük Tabakların Hidrofobik Malzemelerle Kaplanması.
- Authors
Kısaç, Yunus Emre; Uslu, Mustafa Kemal
- Abstract
Expanded polystyrene (EPS) trays are widely used for food packaging and serving because they are light and inexpensive. However, their use has been banned or restricted in many parts of the world due to its negative effects on the environment. In recent years, many studies have been carried out on the production of biodegradable foam trays. Although starch-based foam trays are promising in terms of being biodegradable and having sufficient mechanical resistance, the most important obstacle in their commercial use is that they are not sufficiently resistant to water. In this study, foam trays were produced by adding wheat fiber at a ratio of 7% of starch after wheat starch or mixture of wheatpotato starch was cross-linked with glyoxal. Foam trays were coated by using solutions of polylactic acid (PLA), polycaprolactone (PKL), and polymethyl methacrylate (PMMA). Scanning electron microscope images showed that coating materials formed a 30-40 µm thick layer on the surface of foam trays and making the surface of trays smoother. The average density of foam trays produced from wheat potato starch was 0.120±0.01 g/cm3, which was lower than that of trays produced from wheat starch (0.157±0.02 g/cm³ ). The coating of trays produced from wheat starch with PKL and PLA, and wheat-potato starch with PLA and PMMA did not change the density of trays. Foam trays coated with PLA and PMMA absorbed 12 and 18 times less water than control trays, respectively. The trays made of wheat-potato starch coated with PMMA absorbed only 2.3% of water after 300 minutes, showing that they could be particularly suitable for packaging foods with a high water content. Trays coated with PCL under simulated soil were found to break down on the day 42, and those coated with PLA on the day 84. It was determined that 12.2% of the initial tray weight of trays coated with PMMA remained intact on the 84th day.
- Subjects
WHEAT starch; POLYLACTIC acid; POTATOES; SCANNING electron microscopes; STARCH; FOOD packaging; GLYOXAL; POLYCAPROLACTONE
- Publication
Academic Food Journal / Akademik GIDA, 2022, Vol 20, Issue 4, p365
- ISSN
1304-7582
- Publication type
Article
- DOI
10.24323/akademik-gida.1224341