Fabrication Of Nanofibers Active Packaging Film And Properties Research

Biological functional compounds(BFC) obtained much attention for their important physiological functions and excellent biological efficacy. Much research focus the new technique to improve the stability, release and exert the biological function. Electrospinning technology was extensive applied in biomedical treatment, energy, catalyze, individual protection and cosmetic except food for the fiber with larger surface area and higher porosity. In this study, we fabricated the electrospinning membranes loading hydrophobic and hydrophilic bioactive compounds by electrostatic spinning, combing with nanoemulsion, nanoparticles and the interaction between bioactive compounds and spinning ingredient. The characteristic of membranes were measured by scanning electron microscope(SEM), transmission electron microscope(TEM), fourier transform infrared spectrum(FT-IR), X-ray diffractometer(XRD) and surface tension apparatus. The change of bioactivity of biofunctional compounds loaded in fibrous membrane was evaluated. The information obtained will benefit the development of the electrostatic spinning technology and its derivation in loading delivery systems for food bioactive compounds, served as a reference for the development of food packaging materials.The main results are as follows:1. Tangeretin was encapsulated in electrospinning nanofibers by the emulsion electrostatic spinning technology used PVA/PAA with favorable biocompatibility. The tangeretin-loaded emulsion was prepared by spontaneous emulsification. The small particle size and uniform distribution were not significantly affected by the content of tangeretin. The particle size of mixed system of tangeretin nanoemulsion and PVA/PAA solutions increased but without creaming. The good morphology of fibers was obtained in 8 wt% and 10 wt% PVV/PAA. The ability of resistance to water soluble of tangeretin PVA/PAA fibers was significantly increased after experienced thermal crosslinking modification at 145 oC for 2 h. The thermal treated had no obvious influence on the antioxidant property of tangeretin. The tangeretin loaded in electrostatic spinning membrane exhibited better sustained release(45 h) compared in nanoemulsion, which could release 80 h.2. The nanoparticles of chitosan/tannin were encapsulated in electrospinning nanofibers by electrostatic spinning technology used PVA/PAA/MBA. The optimized concentration of tannin, chitosan and tripolyphosphate were 1 mg/m L,1 mg/m L,0.5 mg/m L respectively, and the ratio was 5:5:1. The nanoparticles of chitosan/tannin was 80 nm with nice distribution at optimal experiment condition. The good morphology of fibers was obtained when the concentration of PVA/PAA is greater than 6 wt %. The ability of resistance to water soluble and hydrophilia of fibers with 5 wt% MBA was best after experienced thermal crosslinking modification at 145 oC for 60 min, and the dissolution ratio was only 11 wt% in water. The chitosan/tannin fibers showed good antioxidant property after thermal treated. The ability of antibacterial of the fibers significantly increased after experienced the situ reduction of nanosilver.3. The tannin was loaded in the surface of zein electrospinning membrane based on the interaction of tannin and zein. The diameter of the fiber was increased by the content of zein increase. The morphology of the fibers was better at 32 wt% zein. The loading ratio of tannin was affected by the concentration of tannin, treated time, treated temperature, and the p H. The optimized experiment condition was p H 6.0, 45 oC. The zein fibers loaded tannin showed good antioxidant and antibacterial. The ability of antioxidant of the fibers was decreased after experienced the situ reduction of nanosilver, but the antibacterial increased and catalytic reduction introduced.