title: Optimization of Ziziphora clinopodiodes essential oil microencapsulation by whey protein isolate and pectin: A comparative study.
abstract: The performance of whey protein isolate (WPI) and pectin as wall materials in encapsulation of Ziziphora clinopodiodes essential oil by ultrasonication method was compared. In this regard, using the response surface methodology, the influence of ultrasonication (US) power (50-150W) and core-coating ratio (10-100%) on the properties of microcapsules was evaluated. Increasing US power and core-coating ratio, caused to increase and decrease the particle size, respectively. The polydispersity index (PDI) of WPI coated microcapsules was increased by increasing of US power. The Zeta potential values were increased by increasing of core-coating ratio. Also, the effect of core-coating ratio on encapsulation efficiency was more than US power. Morphological studies by SEM on optimized microcapsules showed regular spherical shapes. X-ray diffraction analysis revealed that the type of the wall material had no effect on the structural properties of the microparticles. FT-IR analysis confirmed the pronounced effect of electrostatic interactions in the formation of microcapsules.
authors.affiliation: Department of Food Science and Technology, Faculty of Agriculture, Urmia University, Urmia, Iran.
authors.forename: Mahmoud
authors.initials: M
authors.lastname: Hosseinnia
authors.affiliation: Department of Food Science and Technology, Faculty of Agriculture, Urmia University, Urmia, Iran. Electronic address: m.alizadeh@urmia.ac.ir.
authors.forename: Mohammad Alizadeh
authors.initials: MA
authors.lastname: Khaledabad
authors.affiliation: Department of Food Science and Technology, Faculty of Agriculture, Urmia University, Urmia, Iran.
authors.forename: Hadi
authors.initials: H
authors.lastname: Almasi
mesh_terms: D002214:Capsules; D019686:Lamiaceae / Q000737:chemistry*; D009822:Oils, Volatile / Q000737:chemistry*; D010316:Particle Size; D010368:Pectins / Q000737:chemistry*; D013499:Surface Properties; D014783:Viscosity; D000067816:Whey Proteins / Q000737:chemistry*
chemical_list: D002214:Capsules; D009822:Oils, Volatile; D000067816:Whey Proteins; D010368:Pectins
keywords: Coating biopolymers; Microcapsules; Morphology; Particle size; Response surface methodology; Ultrasonication