薄荷精油乳液载量对凝胶膜制备及其缓释性能的影响OACSTPCD

This study focused on the preparation of β-cyclodextrin-stabilized peppermint essential oil Pickering emulsion using the high-pressure homogenization method.Subsequently,the emulsion was incorporated into a chitosan solution and cast to form an essential oil-loaded gel film.The impact of peppermint essential oil loading on the gel film's performance was thoroughly investigated.The results indicated that the cyclodextrin-stabilized peppermint essential oil Pickering emulsion comprised oil droplets aggregated in the external water phase,exhibiting a particle size of 89 nm,a zeta potential of-32.5 mV,and robust stability against external oscillations.When being introduced into the chitosan solution for film formation,the emulsion ensured uniform dispersion of oil droplets without precipitation.Increasing peppermint essential oil loading leaded to a reduction in film transparency,an increase in gel yellowness,and various degrees of reduction in hygroscopicity and water vapor permeability.Remarkably,the addition of peppermint essential oil emulsion significantly enhanced the tensile strength of the gel film,but albeit at the expense of flexibility.Headspace concentration measurements revealed that gel film loaded with peppermint essential oil exhibited its sustained release characteristics.This study provides valuable insights on the interplay between peppermint essential oil loading and the properties of gel films,offering potential applications in controlled release systems and functional films.