title: Characterization of Active Packaging Films Made from Poly(Lactic Acid)/Poly(Trimethylene Carbonate) Incorporated with Oregano Essential Oil.
abstract: Antimicromial and antioxidant bioactive films based on poly(lactic acid)/poly(trimenthylene carbonate) films incorporated with different concentrations of oregano essential oil (OEO) were prepared by solvent casting. The antimicrobial, antioxidant, physical, thermal, microstructural, and mechanical properties of the resulting films were examined. Scanning electron microscopy analysis revealed that the cross-section of films became rougher when OEO was incorporated into PLA/PTMC blends. Differential scanning calorimetry analysis indicated that crystallinity of PLA phase decreased by the addition of OEO, but this did not affect the thermal stability of the films. Water vapor permeability of films slightly increased with increasing concentration of OEO. However, active PLA/PTMC/OEO composite films showed adequate barrier properties for food packaging application. The antimicrobial and antioxidant capacities were significantly improved with the incorporation of OEO (p < 0.05). The results demonstrated that an optimal balance between the mechanical, barrier, thermal, antioxidant, and antimicrobial properties of the films was achieved by the incorporation of 9 wt % OEO into PLA/PTMC blends.
authors.affiliation: Engineering Research Center of Biopolymer Functional Materials of Yunnan, Yunnan Minzu University, Kunming 650500, Yunnan, China. liudong5988@126.com.
authors.forename: Dong
authors.initials: D
authors.lastname: Liu
authors.affiliation: Engineering Research Center of Biopolymer Functional Materials of Yunnan, Yunnan Minzu University, Kunming 650500, Yunnan, China. honglili_1982@163.com.
authors.forename: Hongli
authors.initials: H
authors.lastname: Li
authors.affiliation: Engineering Research Center of Biopolymer Functional Materials of Yunnan, Yunnan Minzu University, Kunming 650500, Yunnan, China. jianglin_1981@163.com.
authors.forename: Lin
authors.initials: L
authors.lastname: Jiang
authors.affiliation: Engineering Research Center of Biopolymer Functional Materials of Yunnan, Yunnan Minzu University, Kunming 650500, Yunnan, China. chuan5211017@126.com.
authors.forename: Yongming
authors.initials: Y
authors.lastname: Chuan
authors.affiliation: Engineering Research Center of Biopolymer Functional Materials of Yunnan, Yunnan Minzu University, Kunming 650500, Yunnan, China. yml@188.com.
authors.forename: Minglong
authors.initials: M
authors.lastname: Yuan
authors.affiliation: Engineering Research Center of Biopolymer Functional Materials of Yunnan, Yunnan Minzu University, Kunming 650500, Yunnan, China. yml@ynni.edu.cn.
authors.forename: Haiyun
authors.initials: H
authors.lastname: Chen
mesh_terms: D000890:Anti-Infective Agents / Q000737:chemistry / Q000494:pharmacology; D000975:Antioxidants / Q000737:chemistry / Q000494:pharmacology; D002152:Calorimetry, Differential Scanning; D004146:Dioxanes / Q000737:chemistry*; D018857:Food Packaging; D055595:Mechanical Phenomena; D008855:Microscopy, Electron, Scanning; D009822:Oils, Volatile / Q000737:chemistry*; D031341:Origanum / Q000737:chemistry*; D019800:Phenol / Q000737:chemistry; D011091:Polyesters / Q000737:chemistry*; D011108:Polymers / Q000737:chemistry*
chemical_list: D000890:Anti-Infective Agents; D000975:Antioxidants; D004146:Dioxanes; D009822:Oils, Volatile; D011091:Polyesters; D011108:Polymers; C059299:polytrimethylene carbonate; D019800:Phenol; C033616:poly(lactide)
keywords: antimicrobial; antioxidant; biodegradable film; food packaging; oregano essential oil; poly(lactic acid); poly(trimethylene carbonate)