Abstract
The academic exploration and technology design of active packaging are coherently supplying innovative approaches for enhancing the quality and safety of food, as well as prolonging their shelf-life. With the object of comparison between two barrier materials, such as stable petrochemical polyurethane (PU), (BASF), and biodegradable natural poly(3-hydroxybutyrate) (PHB), (Biomer Co., Krailling, Germany), the study of antibacterial agent release has been performed. For the characterization of polymer surface morphology and crystallinity, the scanning electron microscopy (SEM), atomic force microscopy (AFM) and differential scanning calorimetry (DSC) were used respectively. The antimicrobial activity of chlorhexidine digluconate (CHD) has been estimated by the Bauer–Kirby Disk Diffusion Test. It was shown that the kinetic release profiles of CHD, as the active agent, in both polymers, significantly differed due to the superposition of diffusion and surface degradation in poly(3-hydroxybutyrate) (PHB). To emphasize the special transport phenomena in polymer packaging, the diffusivity modeling was performed and the CHD diffusion coefficients for the plane films of PU and PHB were further compared. The benefit of active biodegradable packaging on the base of PHB is discussed.
Highlights
World-wide plastic packaging production exceeds 80 millions tons annually [1]
InIn anan aimaim to meet the requirements mentioned in the Introduction, the controlled release system to meet the requirements in the Introduction, the controlled digluconate (CHD)
chlorhexidine digluconate (CHD) has regularly used as an antiseptic with release wide onsystem the base of polyurethane films
Summary
World-wide plastic packaging production exceeds 80 millions tons annually [1]. Most of them originate from fossil resources and are disposed of in landfill after a relatively short period of services. The resulting waste can quickly pile up, leading to a serious environmental harm. Petrochemical packaging fabrication and following incineration cause air pollution due to CO2 release in addition to other health public risks [2]. The environmental concern of packaging pollution can be strongly diminished by using renewable natural feedstock polymers and transferring to biodegradable packaging. A most advantageous strategy in food pack industry is the design of sustainable barrier polymers [3] which are fully biodegradable in soil and aqueous media, without any negative impact upon environment and living systems
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