Characterization of Biobased Alginate/Glycerol/ Sunflower Oil as Biodegradable Packaging

Abstract

The most used packaging material was plastic, but can cause environmental problems because it was not easily degraded. Therefore, it was necessary to look for alternative packaging materials that are easily biodegraded including edible film. The main raw materials for edible films were alginates and plasticizers including glycerol and sunflower oil. The objective of this study was to determine the characteristics of edible film composed of alginate, glycerol and sunflower oil. The study was carried out through the manufacture of edible films composed of various alginates concentrations (2, 3, 4, 5 and 6%), 10% glycerol and 0.01% sunflower oil. The characteristics tested included thickness, tensile strength, elongation, solubility, and rate of water vapor transmission. The results showed that all treatments met the edible film standard of the Japanese Industrial Standard. The various alginate concentrations used did not significantly influence the water vapor transmission rate and tensile strength but significantly affected the elongation, solubility and thickness of the edible film. * Corresponding author: a-husni@ugm.ac.id

Production and characterization of levan by <i>Bacillus siamensis</i> at flask and bioreactor

“…The weight loss of uncoated guava was 77.87 %, which was higher than that of the guava coated with levan film containing 2 or 3 % (w / v) sodium alginate. (Hajji et al, 2018;Dewi and Husni, 2020). Conversely, the weight loss of the guava coated with purified levan film containing 3 % (w / v) sodium alginate was 74.80 % and not significant when compared with that of the uncoated guava (p ＞ 0.05).…”

“…Alginate is a hydrophilic compound that retains little moisture. When alginate concentration increases, the water vapor transmission rate also increases (Dewi and Husni, 2020). However, the edible film with purified levan containing 3 % (w / v) sodium alginate demonstrated the lowest WVP at 2.84 × 10 −8 g m −1 s −1 Pa −1 .…”