Preparation and characterization of hyacinth bean starch film incorporated with TiO2 nanoparticles and Mesona chinensis Benth polysaccharide

Hyacinth bean starch (HBS) was used to prepare nanocomposite films with the reinforcement agent of nanotitanium oxide (TiO 2 -N) and Mesona chinensis Benth polysaccharide (MCP). The effects of TiO 2 -N and MCP on the moisture combination, rheological properties of film-forming solutions (FFS) and physiochemical properties of films were investigated. Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD) revealed that HBS, TiO 2 -N and MCP had good compatibility, while no novel absorption peak in FTIR spectra, and characteristic peaks of TiO 2 -N were found in XRD patterns of composite films. Contact angle of HBS/TiO 2 -N/M3 film increased from 65.6° to 90.9°, which illustrated that TiO 2 -N and MCP effectively enhanced hydrophobicity of films. TiO 2 -N and MCP positively affected anti-UV light ability of HBS films by resisting most of invisible light. Furthermore, stable and compact network structures were formed by the synergistic effect of TiO 2 -N and MCP, thereby elongation to break was increased from 17.123% to 28.603% significantly, and heat resistance was enhanced clearly. This study prepared a nanocomposite HBS-based films based TiO 2 -N and MCP, which had guiding significance for development of functional films and combination of polysaccharides and metallic oxide.