Development of multifunctional food packaging films based on chitosan, TiO2 nanoparticles and anthocyanin-rich black plum peel extract

By Xin Zhang, Yunpeng Liu, Huimin Yong, Yan Qin, Jing Liu, J. Liu. Food Hydrocolloids, 2019

493 citations recorded by the source corpus.

Abstract Multifunctional food packaging films were developed based on chitosan (CS), nanosized TiO2 and black plum peel extract (BPPE). Effects of TiO2 and/or BPPE on the physical and functional properties of CS film were investigated. Results showed BPPE contained nine phenolic compounds with 23.29% of anthocyanins. The physical property of CS film could be significantly altered by incorporating TiO2 and/or BPPE. Notably, CS TiO2, CS-BPPE and CS TiO2-BPPE films all possessed higher barrier properties against water vapor and UV–vis light, and better mechanical strength than CS film. Scanning electron microscopy showed CS-BPPE film had a denser and smoother cross-section as compared to CS film. In addition, several white particles were clearly observed in the cross-section of CS-TO2 and CS TiO2-BPPE films. Fourier transform infrared spectroscopy and X-ray diffraction further revealed that CS could interact with TiO2 and BPPE through non-covalent bonds. Antioxidant assay showed CS-BPPE and CS TiO2-BPPE films both possessed strong free radical scavenging activity. Notably, CS TiO2-BPPE film exhibited the highest ethylene scavenging ability and antimicrobial activity among all films tested. Due to abundant anthocyanins in BPPE, the colors of CS-BPPE and CS TiO2-BPPE films were pH-sensitive. Our results suggest CS TiO2-BPPE film can be used as antioxidant, ethylene scavenging, antimicrobial and pH-sensitive food packing material.

Subfields: Biomaterials, Materials Chemistry, Polymers and Plastics

View Paper: https://www.semanticscholar.org/paper/c5affd3ac21cec8c28af37a0622b2f0b898acc1e