<i>In Situ</i> Formation of Microfibrillar PBAT in PGA Films: An Effective Way to Robust Barrier and Mechanical Properties for Fully Biodegradable Packaging Films

Yang, Fan; Zhang, Caili; Ma, Zhirui; Weng, Yunxuan

doi:10.1021/acsomega.2c02484

Cited by 24 publications

(18 citation statements)

References 51 publications

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“…Figure a displays an obvious glass transition, a cold crystallization exotherm, and a melting endotherm of PGA. The melting peak of PBAT is difficult to observe in the quenched PGA/PBAT film due to the low mass fraction and low crystallinity of PBAT, which is agreement with literature . The glass transition temperature ( T g ) of PGA for quenched film is found to be 29.8 °C, which is about 10 °C lower than that of highly crystallized PGA.…”

Section: Resultssupporting

confidence: 85%

“…The melting peak of PBAT is difficult to observe in the quenched PGA/PBAT film due to the low mass fraction and low crystallinity of PBAT, which is agreement with literature. 37 The glass transition temperature (T g ) of PGA for quenched film is found to be 29.8 °C, which is about 10 °C lower than that of highly crystallized PGA. The cold crystallization temperature (T cc ) and melting temperature (T m ) of PGA are identified as 79.2 and 219.8 °C, respectively.…”

Section: Thermal and Mechanical Behavior Of Thementioning

confidence: 91%

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Drawing Temperature-Dependent Mechanical Properties of Poly(glycolic acid)/Poly(butylene adipate-co-terephthalate) Films

Niu

et al. 2022

Macromolecules

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The application of biocompostable poly(glycolic acid) (PGA) is hindered by the conflict between its strength and ductility. In this work, we address an effective strategy to obtain designable strength and ductility of PGA/poly(butylene adipate-co-terephthalate) (PBAT) films by tuning the drawing temperature. At low temperatures (35–40 °C), the poor chain mobility leads to a predominance of stress-induced amorphous chain orientation rather than relaxation and crystallization, and the drawn films exhibit high tensile strength (145 MPa) with remarkable strain hardening. Then, the chain relaxation becomes pronounced due to the increased chain mobility at a temperature range of 45–50 °C, resulting in a low orientation, low crystallinity, and consequently high ductility (elongation at break of 320%). At the high temperature region (55–60 °C), further enhanced chain mobility facilitates the formation of oriented PGA crystallites, which restrict chain relaxation and provide more strengthened elements. As a result, PGA-based films with excellent strength, stiffness, and ductility (e.g., 103 MPa, 2800 MPa, and 220%, respectively) are achieved. Therefore, this work provides an effective route to tune the mechanical properties of PGA materials, and in principle it should be applicable to other semicrystalline polymeric systems as well.

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Section: Resultssupporting

confidence: 85%

Section: Thermal and Mechanical Behavior Of Thementioning

confidence: 91%

Drawing Temperature-Dependent Mechanical Properties of Poly(glycolic acid)/Poly(butylene adipate-co-terephthalate) Films

Niu

et al. 2022

Macromolecules

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“…In addition to improving compatibility, polymer blends’ morphology is crucial for regulating their barrier properties. Microfibrillar PBAT in polyglycolic acid (PGA), for example, improved the mechanical properties and barrier for fully biodegraded packaging films (Yang, Zhang, Ma, et al., 2022; Yang, Zhang, Chen, et al., 2022). The oxygen permeability of the polymer was improved by in situ micro fibrillation.…”

Section: Classification Of Bio‐based Materials For Meat Packagingmentioning

confidence: 99%

A critical review on biodegradable food packaging for meat: Materials, sustainability, regulations, and perspectives in the EU

Siddiqui

Sundarsingh

Bahmid³

et al. 2023

Comp Rev Food Sci Food Safe

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The development of biodegradable packaging is a challenge, as conventional plastics have many advantages in terms of high flexibility, transparency, low cost, strong mechanical characteristics, and high resistance to heat compared with most biodegradable plastics. The quality of biodegradable materials and the research needed for their improvement for meat packaging were critically evaluated in this study. In terms of sustainability, biodegradable packagings are more sustainable than conventional plastics; however, most of them contain unsustainable chemical additives. Cellulose showed a high potential for meat preservation due to high moisture control. Polyhydroxyalkanoates and polylactic acid (PLA) are renewable materials that have been recently introduced to the market, but their application in meat products is still limited. To be classified as an edible film, the mechanical properties and acceptable control over gas and moisture exchange need to be improved. PLA and cellulose‐based films possess the advantage of protection against oxygen and water permeation; however, the addition of functional substances plays an important role in their effects on the foods. Furthermore, the use of packaging materials is increasing due to consumer demand for natural high‐quality food packaging that serves functions such as extended shelf‐life and contamination protection. To support the importance moving toward biodegradable packaging for meat, this review presented novel perspectives regarding ecological impacts, commercial status, and consumer perspectives. Those aspects are then evaluated with the specific consideration of regulations and perspective in the European Union (EU) for employing renewable and ecological meat packaging materials. This review also helps to highlight the situation regarding biodegradable food packaging for meat in the EU specifically.

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“…Unfortunately, PBAT is susceptible to UV-light, temperature, and humidity, which would make them brittle and rupture during the service life as mulching films. , Previous studies have demonstrated that ultraviolet (UV) irradiation is the main reason for the deterioration of the mechanical properties of PBAT films. , On the other hand, PGA is thermal sensitivity with a narrow processing window, and certain degree of degradation is induced during melt-compounding and the subsequently film extrusion-blowing. Consequently, antioxidant additives are necessary for PBAT/PGA blends to ensure the processing thermal stability. − In addition, the high-density ester groups of PGA molecular chains make it easily attacked by weathering factors. , However, no published data is related to the degradation behavior of PBAT/PGA blown films under the UV-accelerated degradation test.…”

Section: Introductionmentioning

confidence: 99%

High Barrier Poly(Glycolic Acid) Modified Poly(Butylene Adipate-co-terephthalate) Blown Films and Accelerated Ultraviolet Degradability Evaluation

Wei

Guo

Lyu

et al. 2023

ACS Appl. Polym. Mater.

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The barrier performance and mechanical properties of films play important roles in handling and moisture retention when used in agricultural fields. Herein, poly(butylene adipate-terephthalate)/polyglycolic acid (PBAT/PGA) blending films are prepared by melt-compounding and extrusion-blowing under the presence of antioxidant compounds. The results show that the incorporation of PGA improves the tensile strength, tear resistance, and water vapor barrier property. With the aid of a chain extender, no obvious phase separation and good compatibility are obtained for PBAT/PGA blends. Moreover, antioxidant compounds (1010/AP-618) greatly improve the thermal stability, which is beneficial for thermal processing. Finally, the ultraviolet (UV)-accelerated degradation behavior of PBAT/PGA are investigated. With increasing UV-irradiation days, both the tensile strength and elongation at break of the PBAT/PGA15 (AP) gradually decrease. Also, the characteristic crystalline peaks of PBAT and the initial decomposition temperature of the degraded films progressively decline, suggesting the chain breakages induced by UV irradiation. However, the water vapor barrier permeability is well-maintained due to the high crystallinity of the PGA region, indicating an excellent barrier performance of PBAT/PGA films in the service life. Therefore, the current work proposes high-barrier PBAT/PGA films and explores the photodegradation behavior for the first time, which highlights the great potential as mulching films. KEYWORDS: poly(butylene adipate-co-terephthalate) (PBAT), poly(glycolic acid) (PGA), artificial weathering, barrier property, antioxidants

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In Situ Formation of Microfibrillar PBAT in PGA Films: An Effective Way to Robust Barrier and Mechanical Properties for Fully Biodegradable Packaging Films

Cited by 24 publications

References 51 publications

Drawing Temperature-Dependent Mechanical Properties of Poly(glycolic acid)/Poly(butylene adipate-co-terephthalate) Films

Drawing Temperature-Dependent Mechanical Properties of Poly(glycolic acid)/Poly(butylene adipate-co-terephthalate) Films

A critical review on biodegradable food packaging for meat: Materials, sustainability, regulations, and perspectives in the EU

High Barrier Poly(Glycolic Acid) Modified Poly(Butylene Adipate-co-terephthalate) Blown Films and Accelerated Ultraviolet Degradability Evaluation

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