Development of temperature indicator prototype: Cardpaper coated with chitosan intelligent films

Abstract

An intelligent and biodegradable material packaging was developed based on a natural and thermal-sensitive pigment. Anthocyanin (ATH, 0.50 g/100g) was incorporated into chitosan matrix films (2 g/100g) forming a chitosan intelligent film (C-ATH). The system is able to indicate the variation of temperature during distribution and storage chain of industrial products. The novelty of this work was an alternative packaging material that it is biodegradable and could inform any temperature variations on the range of 40˚C - 70˚C, by irreversible visual colour changes.