Abstract
In this study, the use of potato fruit juice (PFJ) to make plastic films is presented. PFJ is an interesting raw material as it is obtained as a by-product from the potato-starch industry. The films showed uniquely high oxygen barrier properties, and the PFJ material is therefore a potential replacement for the most commonly used, expensive and petroleum-based ethylene-vinyl alcohol copolymer (EVOH) as a barrier layer in future packaging. The films also exhibit good grease resistance. As expected for hydrophilic materials, they exhibited high water vapour transmission rate, which shows that they, as for EVOH, have to be laminated with hydrophobic polymers in food packaging. The films, having a glass transition temperature between −5 °C and 10 °C, showed elastic–plastic behaviour with stable crack growth.
Highlights
The development of bio-based packaging materials to replace synthetic materials has gained momentum in recent years
For the rst time, we have shown that it is possible to make plastic lms from potato fruit juice (PFJ) and that the properties are promising, even surprisingly good, such as oxygen barrier properties
The water vapour permeability was found to increase with added plasticizer, whereas the oxygen permeability decreased
Summary
The development of bio-based packaging materials to replace synthetic materials has gained momentum in recent years. Researchers have investigated the use of PPIs as bio-based polymer lms.[18,19] PFJ has not been studied for its lm forming properties. For the rst time, we have shown that it is possible to make plastic lms from PFJ and that the properties are promising, even surprisingly good, such as oxygen barrier properties.
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