Intelligent films based on highland barley β-glucan/highland barley prolamin incorporated with black rice bran anthocyanins

In this work, the effect of incorporating highland barley prolamin (HBP) on the properties of highland barley β-glucan (HBBG) films was investigated. Besides, the improvement of black rice bran anthocyanins (BRA) on intelligence effect of HBBG/HBP film was studies. The addition of HBP enhanced the barrier properties of HBBG film, indicating that the water vapor permeability and oxygen permeability of HBBG film decreased. In addition, the mechanical, thermal, optical properties and water contact angle of HBBG film were also found to be improved by the addition of HBP. The colors of HBBG/HBP/BRA films changed quickly and could be distinguished by eye in different pH solution and ammonia environment due to the abundant anthocyanins in BRA. Furthermore, the stability of anthocyanins in BRA was enhanced through hydrogen bond among BRA, HBBG and HBP. Therefore, HBBG/HBP/BRA films have broad prospects in intelligent packaging. [Display omitted] •Mechanical properties of HBBG film were improved by incorporating of HBP and BRA.•The addition of HBP enhanced the barrier properties of HBBG film.•The HBBG/HBP/BRA films showed high excellent antioxidant bioactivity.•HBBG/HBP/BRA films displayed strong color response to alkaline gases or different pH.