摘要
Pectin andε-polylysine(ε-PL)nanoparticles loaded with Litsea cubeba essential oil(LEO)(PP-LNPs)were pre-pared through the electrostatic interaction.Metal phenol network(MPN)coatings,designated as MPN@PP-LNPs,were fabricated on the surface of the nanoparticles via self-assembly process of tannic acid(TA)and FeIII to develop food preservative materials with pH-responsive controlled release.The morphology,encapsulation ef-ficiency,and pH-responsive release characteristics of MPN@PP-LNPs were investigated.The results showed that the particle size of MPN@PP-LNPs was 432.5±58.6 nm.Furthermore,the encapsulation efficiencies ofε-PL and LEO were 83.26±2.21%and 30.78±3.92%,respectively.TA was rapidly released at low pH,while LEO exhibited controlled release over a wide pH range(pH 1.2-9.0).In addition,the MPN coating has been demonstrated to enhance antioxidant activity and inhibit the growth of E.coli and S.aureus under acidic con-ditions.Furthermore,preliminary evidence suggests that MPN@PP-LNPs are not cytotoxic.In conclusion,MPN@PP-LNPs,prepared through the self-assembled surface modification of TA and Fe^(II)I,was an effective material for food preservation.
基金
supported by the Fundamental Research Funds for the Central Universities(No.202261045)
National KeyR&D Program of China(2021YFD2100501).
