Development of hydroxypropyl methylcellulose films with corn silk polysaccharides and its application as biomaterial in enhancing the shelf life of mozzarella cheese

Abstract

Abstract Hydroxypropyl methylcellulose (HPM) is a viscous modified natural polymer that is utilised as thickener, emulsifier and reducer of serum cholesterol. Novel films composed from HPM and corn silk polysaccharides (CSP) were prepared (HPM‐corn silk [CS]). The impact of using different percentages of CSP on the characteristics of HPM‐CS was studied. Results showed that replacing 37.5% of HPM with CSP led to a significant improvement in mechanical properties, with an increase of 58.71% for tensile strength and 54.29% for elongation at break. In addition, the produced films showed improved opacity, antioxidant activities and a smooth, continuous surface without any grooves, as well as being biodegradable. However, the thermal stability was reduced, and the crystallinity shapes were disrupted at higher concentrations due to the inclusion of CSP in the HPM‐CS films. The best HPM concentration (1 g/100 mL) with optimum CSP concentration of (0.6 g/100 mL) was used as food packaging material for low‐moisture mozzarella cheese. The packaging material kept the stability of total microbial count in hygienic scale up to 40 days of cold storage, moisture loss and pH values up to 30 days. Additionally, the results of hedonic sensory evaluation were satisfied compared with fresh cheese until 30 days of storage.