A novel zein/poly (propylene carbonate)/nano-TiO2 composite films with enhanced photocatalytic and antibacterial activity. (July 2018)

• Record Type: Journal Article
• Authors: Li, Shuhong; Zhao, Shuang; Qiang, Siqi; Chen, Guiyun; Chen, Yue; Chen, Ye
• Is Part Of: Process biochemistry. Volume 70(2018)
• Page Start: 198
• Page End: 205
• Publication Date: 2018-07
• Subjects: Zein -- PPC -- Nano-TiO2 -- Characterization -- Photocatalytic activity -- Antibacterial activity; Biochemical engineering -- Periodicals; Biotechnology -- Periodicals; Biochemistry -- periodicals; Biotechnology -- periodicals; Chemical Engineering -- periodicals; Génie biochimique -- Périodiques; Biotechnologie -- Périodiques; Biochemical engineering; Biotechnology; Periodicals; 660.63
• DOI: 10.1016/j.procbio.2018.03.029
• Languages: English
• ISSNs: 1359-5113

Abstract

Graphical abstract: Highlights: Composite films were prepared using zein, poly (propylene carbonate) and nano-TiO2 . Relationship between tensile strength and relative humidity of films was established. Zein/PPC/nano-TiO2 films were characterized using SEM, DSC and FTIR. Photocatalytic and antibacterial activity of composite films were enhanced. Abstract: Composite films were prepared by extrusion technology using zein, poly propylene carbonate (PPC) and nano-TiO2 . The samples were characterized by scanning electron microscopy (SEM), differential scanning calorimetry (DSC), fourier transform infrared spectroscopy (FTIR) and mechanical properties experiments. Based on the Halsey equation, the relationship between tensile strength and relative humidity is established to predict the tensibility of the composite films under different humidity conditions. The SEM study revealed that zein and PPC could form a homogeneous network structure and uniform distribution of nano-TiO2 in films. Furthermore, the composite films presented a good thermal stability. The structural analysis showed that ester groups were major forces responsible for complex formation. In addition, the photocatalytic degradation of methyl orange (MO) followed pseudo first-order kinetics was also investigated, and the removal rate of MO could achieve up to 85.06%. The antibacterial experiment indicated that zein/PPC/nano-TiO2 film had good activity against the E. coli, S. aureus and salmonella . The obtained results indicated the designed film may be a potential alternative for food packaging.