A novel PLA high oxygen barrier multilayer film/foam

Souza, Claudio Roberto Lima de; Feng, Jingxing; Olah, Andrew; Baer, E.; Mauler, Raquel Santos; Wnek, Gary E.

doi:10.1002/pls2.10079

Cited by 4 publications

(4 citation statements)

References 39 publications

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“…There were also researchers who improved the film properties by different fabrication processes. de Souza et al 10 achieved extremely high barrier properties by using a multilayer co‐extrusion technique with alternating laminations of PLA and foam. To increase the mechanical and antibacterial resistance of PLA sheets, other researchers used nanostructured substances such nanohydroxyapatite, nano‐silver, and nanocrystalline copper 11–13 …”

Section: Introductionmentioning

confidence: 99%

Study on the property of mesoporous silica nanoparticles loaded with nisin for poly (lactic acid)‐based packaging film

Jiang

Zhu

et al. 2023

Polymer Composites

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Nisin was loaded in mesoporous silica nanoparticles (MSN) (0, 1, 2 and 3 wt%) and incorporated into poly (lactic acid) (PLA) matrix by casting method. The mechanical property, water vapor permeability, thermal property, and antimicrobial property of PLA nanocomposite films were measured. And the internal structure of the composite film was observed through the Scanning electron microscope. Meanwhile, the kinetic of nisin releasing from food simulated solution was investigated and the migration model was established. The result showed that mesoporous silica had an effect on the mechanical and thermal property of the composite films. Both water vapor transmission rate (WVP) and oxygen permeation rate (OTR) decreased, especially for 3MSN/NI/PLA, where WVP decreased by about 9.64% and OTR decreased by 35.19%, which was beneficial to improve the preservation effect. With the addition of MSN, the amount of loaded nisin increased, and at 3MSN/NI, the nisin loading reached 88.75%, and the mesoporous silica could effectively control the release of nisin, thus prolonging the preservation effect. The release kinetic of nisin was described by Fick's law and Weibull's model. In short, the PLA nanocomposite film has the potential to be used as an antimicrobial active film by adding nisin as an antimicrobial agent.Highlights A biodegradable antimicrobial food grade film was prepared. Nisin was added to the films as an antimicrobial agent. The ordered mesoporous structure of MSN was used as a carrier of antimicrobial agent. The film effectively inhibits E. coli and S. aureus by controlling the release of nisin. Fick's law and Weibull's model were used to describe the release kinetics of Nisin.

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Section: Introductionmentioning

confidence: 99%

Study on the property of mesoporous silica nanoparticles loaded with nisin for poly (lactic acid)‐based packaging film

Jiang

Zhu

et al. 2023

Polymer Composites

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“…19,20 Finished PP products can greatly eliminate the internal stress of PP and reduce the vacancies and defects caused by imperfect crystallization. 21,22 Moreover, the mechanical properties of PP can be improved significantly under suitable heat treatment conditions. Heat treatment temperature and time is very important due to the extreme sensitivity of PP to temperature especially in low temperatures.…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, in order to improve the performances of the finished polymer and meet the increasing performance needs, the post‐treatment of the finished polymers is carried out by using the heat treatment method 19,20 . Finished PP products can greatly eliminate the internal stress of PP and reduce the vacancies and defects caused by imperfect crystallization 21,22 . Moreover, the mechanical properties of PP can be improved significantly under suitable heat treatment conditions.…”

Section: Introductionmentioning

confidence: 99%

Toughness enhancement of PP/EVA/LDH composites by controlling β nucleating agent and annealing treatment

Guo,

Chen,

Guo

et al. 2023

Polymer Composites

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In order to use polypropylene (PP) more efficiently without destroying its excellent properties, heat treatment after molding is undoubtedly a facile and effective way. In this work, the temperature and time are used as the main treatments for the process regulation of PP/ethylene vinyl acetate copolymer/layered double hydroxide (PP/EVA/LDH) composites with β nucleating agent. The toughness, crystallization behaviors, and crystal morphologies of PP/EVA/LDH composites are investigated by using Izod impact tester, X‐ray diffraction (XRD), scanning electron microscope (SEM), differential scanning calorimeter (DSC), and polarizing optical microscope (POM). The notched impact strength of the annealed 6PEL2 at 120°C for 12 h reaches 8.0 kJ/m2, which is approximately 186% higher than that of untreated PP (2.8 kJ/m2). The SEM results show that the annealing process‐induced debonding of the phase interface and the enhancement of cavitation enhance the energy dissipation behavior of 6PEL2 under impact loading, which is strongly supported by the increase of folded surfaces on the fracture plane and the pull‐out deformation of the EVA phase. Furthermore, the promising toughening results of 6PEL2 are derived from the secondary crystallization rearrangement of α‐crystals, the reduction of spherical crystal sizes, and the change of crystallization behaviors of β‐crystals.Highlights PP/EVA/LDH composites with nucleating agent are effectively regulated by annealing treatment. Improvement of toughness of polypropylene composites is attributed to the crystalline transformation effect on the crystals and the weak internal stresses. The formation of β‐crystals induced by the nucleating agent greatly absorbs a large amount of energy during the impact fracture.

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“…In the last years, biodegradable polymers have attracted much attention due to their unique characteristics that support their potential application in agricultural mulch, 1–4 packaging, 5–11 medicine, 12–17 and other fields 18–25 . Among them, poly(butylene adipate‐co‐terephthalate) (PBAT) is a promising biodegradable polymer and is widely used in film materials due to its excellent mechanical properties, ductility, toughness, degradation performance, etc 26,27 .…”

Section: Introductionmentioning

confidence: 99%

Influence of scutellaria baicalensis extract on the thermo‐oxidative and composting stability of poly(butylene adipate‐co‐terephthalate)

Li,

Kong,

Zhang

et al. 2023

Vinyl Additive Technology

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Scutellaria baicalensis extract (SBE), as a natural phenolic antioxidant, was added to poly(butylene adipate‐co‐terephthalate) (PBAT) matrix. With the addition of SBE, both the short‐term and long‐term antioxidant activity of PBAT samples noticeably improved. The results showed that the oxidation onset temperature (OOT) value of the modified sample (PBAT‐SBE2.5 sample) is increased by 62°C versus neat PBAT. Compared with neat PBAT with decreased OOT value after 240 days of storage, the OOT values of modified samples showed no significant change after long‐term storage. The excellent antioxidant activity is attributed to the high total phenolic content in SBE, which provides significant free radical scavenging efficiency. Additionally, the introduction of SBE could effectively enhance the processing performance of the PBAT matrix, the melt flow rate of PBAT‐SBE2.5 increased by ca. 42.6%. Compared with neat PBAT, the addition of SBE has no obvious effect on the mechanical properties of the matrix, the tensile strength remains unchanged and the elongation at break of PBAT‐SBE2.5 retains 74%. Composting degradation experiment indicated that the SBE promoted the degradation of PBAT. Moreover, SBE could reduce the surface hydrophilic tendency of the film materials. All results reveal that SBE was a good natural multifunctional stabilizer for PBAT.Highlights SBE shows high total phenolic content and free radical scavenging activity. SBE improves the short‐term and long‐term antioxidant activity of PBAT. The addition of SBE promoted the degradation of PBAT films. SBE could effectively enhance the processing performance of the PBAT matrix.

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A novel PLA high oxygen barrier multilayer film/foam

Cited by 4 publications

References 39 publications

Study on the property of mesoporous silica nanoparticles loaded with nisin for poly (lactic acid)‐based packaging film

Study on the property of mesoporous silica nanoparticles loaded with nisin for poly (lactic acid)‐based packaging film

Toughness enhancement of PP/EVA/LDH composites by controlling β nucleating agent and annealing treatment

Influence of scutellaria baicalensis extract on the thermo‐oxidative and composting stability of poly(butylene adipate‐co‐terephthalate)

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