Study on the preparation technology of emulsion and microencapsulation of procyanidins

The dynamic high pressure microfluidization ( DHPM) and spray-drying method were applied to prepare emulsion and microencapsulation of procyanidins.The DHPM technology was chosed to deal with procyanidins emulsion, using gum arabic and β-cyclodextrin as wall material, the independent variables were gum arabic content, the total solids content, dosage of emulsifying agent and treating pressure, the response was Zeta potential of emulsion. The single factor and response surface analysis results showed that the optimum process conditions were that gum arabic content was 40%, total solids content was15% and treating pressure was 160 MPa.The capsulation productivity was 98.20% and its efficiency was 88.60% after spraydrying. Furthermore, Fourier Transform Infrared Spectroscopy ( FI-IR) was used to characterize procyanidins and microencapsulation, results showed that peak intensities of some chromatographic peaks were different, which need further analysis the effect of DHPM technology on the essentials of procyanidins.