Controllable Poly(L-lactic acid) Soft Film with Respirability and Its Effect on Strawberry Preservation

Yun, Xueyan; Li, Xiaofang; Eerdunbayaer,; Cheng, Peifang; Pan, Pengju; Dong, Tungalag

doi:10.1134/s0965545x21020139

Cited by 5 publications

(6 citation statements)

References 29 publications

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“…237 To obtain soft PLLA films for food packaging, Yun et al produced a series of PLLA-PCL-PLLA (PLCLxCy) copolymers with different block lengths. 238 As expected, the existence of a flexible PCL chain resulted in higher ductility of copolymers and 35 times improvement in fracture strain of PLLA.…”

Section: Copolymerisationsupporting

confidence: 61%

“…Since PCL is a clastic polymer with a large elongation of around 1500%, the elongation of poly(LA‐CL) copolymers reaches around 500% 237 . To obtain soft PLLA films for food packaging, Yun et al produced a series of PLLA–PCL–PLLA (PLCLxCy) copolymers with different block lengths 238 . As expected, the existence of a flexible PCL chain resulted in higher ductility of copolymers and 35 times improvement in fracture strain of PLLA.…”

Section: Modification Of Pllamentioning

confidence: 91%

“…The PCL plays a role of penetration channel, and the CO 2 permeability of PLLA film increased 2 $ 3 times with the existence of higher molecular weight PCL. 238 The copolymer structure has various changes and has a variety of heterogeneous structures. Copolymers with different components and sequence structures have different permeability properties.…”

Section: Permeability Of Plla-based Copolymersmentioning

confidence: 99%

“…Results showed that phase separation occurred in this immiscible system. The PCL plays a role of penetration channel, and the CO 2 permeability of PLLA film increased 2 ~ 3 times with the existence of higher molecular weight PCL 238 …”

Section: Modification Of Pllamentioning

confidence: 99%

“…Nevertheless, fresh or cooked meat is still sold in vacuum or outer packaging. MAP of meat or aquatic products is still relatively rare because the shelf life of meat and aquatic products can be prolonged by freezing or refrigeration to reduce microbial metabolism and fat oxidation, which compensate for the defects in packaging 238,317–319 . Except for the transparency, safety and mechanical properties of the packaging materials for fruits and vegetables, it requires water vapour permeability and CO 2 /O 2 selection.…”

Section: Degradable Materials For Food Packagingmentioning

confidence: 99%

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Mechanical and gas permeability properties of poly(L‐lactic acid)–based films and their application in fresh produce preservation—Review

Yun,

Liu,

et al. 2024

Packag Technol Sci

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Plastics have remained the best choice for fruit and vegetable packaging due to their exceptional transparency, flexibility, optional good barrier and cost‐effectiveness. However, a large number of plastics end up in the environment after serving their intended purpose and persist there for centuries. Since worldwide attention to environmental issues has become an irreversible historical trend, cost‐effective renewable biodegradable packaging material is highly desirable for the packaging industry to satisfy both industrial demands as well as consumer expectations. Poly (L‐lactic acid) (PLLA), a renewable biodegradable polymer derived from biomass, has been widely studied as a very attractive polymer for food packaging applications. However, its brittle nature and medium CO2/O2 permeability are not friendly for its utilisation in the aspect of fresh agricultural products packaging. In such a context, great efforts have been devoted to improvements in the mechanical and permeability of PLLA to meet the requirements of food packaging. The main purpose of the review is to summarise the mechanical and permeability properties of composite films developed by the incorporation of toughness reinforcing agents into the PLLA matrix. The elongation at break of PLA can be increased up to 250 times by modification, and the CO2 permeability of PLA can be increased by 2–3 times by modification. We also elaborate on studies of the preservation effect of PLLA composite films on fresh fruits and vegetables.

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Section: Copolymerisationsupporting

confidence: 61%

Section: Modification Of Pllamentioning

confidence: 91%

Section: Permeability Of Plla-based Copolymersmentioning

confidence: 99%

Section: Modification Of Pllamentioning

confidence: 99%

Section: Degradable Materials For Food Packagingmentioning

confidence: 99%

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