Abstract
Time temperature indicator film based on alginate and red beetroot (Beta vulgaris L.) extract: in vitro characterization
Highlights
This study was aimed to develop and characterize a biodegradable time temperature indicator (TTI) film by incorporating red beetroot (Beta vulgaris L.) extract, which is rich in betalain pigments, into alginate (A) / polyvinyl alcohol (PVA) blend film
Increasing the concentration of A provided an increase in elastic modulus, tensile strength and elongation at break (%) of alginate-PVA blends (APVA) and TTI films
The ratio of A to PVA in blend films did not create a significant effect on thermogravimetric analysis (TGA) thermograms
Summary
This study was aimed to develop and characterize a biodegradable time temperature indicator (TTI) film by incorporating red beetroot (Beta vulgaris L.) extract, which is rich in betalain pigments, into alginate (A) / polyvinyl alcohol (PVA) blend film. Traditional food packaging materials provide protection from environmental influences, contribute to the extended shelf-life, encourage consumers to purchase the product and have convenience attributes such as ease of access, handling [1]. Intelligent packaging is a system which enhances food safety by informing consumer about quality of the packed food and has extra characteristics such as detection, sensation, recording, tracing and communication [5]. It is known that the shelf life of the food depends on the internal structure of food and outside factors including temperature, relative humidity and outside gas composition [6]. Time temperature indicators (TTIs) that record and observe temperature effect on food quality from production to consumption, are an easy to use and an impressive intelligent packaging system [7]. TTIs that confirm consumers with color indicators representing food quality are generally part of the food package [8]. Pennanen et al [9] stated that much work is still needed to enable TTIs to gain a wider acceptance by the consumers
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