Modification of polylactide by poly(ionic liquid)-b-polylactide copolymer and bio-based ionomers: Excellent toughness, transparency and antibacterial property

Chen, Xiangjian; Ding, Yingli; Li, Yang; Li, Jinshan; Sun, Liming; Wei, Xiaohui; Wei, Jie; Zhang, Kunyu; Wang, Hao; Pan, Li; He, Shengbao; Li, Yuesheng

doi:10.1016/j.ijbiomac.2022.08.122

Cited by 13 publications

(12 citation statements)

References 81 publications

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“…[320][321][322][323] PLA can be used to produce plastic bottles for water; however, its barrier properties are low and therefore it is not recommended for storing some types of beverages. 324 Regarding its mechanical performance, PLA is brittle, [325][326][327] with less than 10% elongation at break 328,329 and has low impact resistance (commonly mentioned value: 2.5 kJ/m 2 ), [330][331][332] so its use is limited for some applications. In the work by Aliotta et al, 333 the elongation at break for PLA was 3.22%.…”

Section: Starch: Generalities and Gelatinizationmentioning

confidence: 99%

Polymer blends of poly(lactic acid) and starch for the production of films applied in food packaging: A brief review

Silva

Rios

Santana

2023

Polymers from Renewable Resources

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The limited degradation of synthetic polymers used in food packaging when discarded in the environment is a major concern for society. Therefore, industry and academia have sought to develop biodegradable and eco-friendly materials for single-use in packaging. An interesting alternative for the food industry is biodegradable polymeric films, which is why different biopolymers have been used in the production of sustainable packaging. It is worth mentioning that the use of biodegradable polymers is one of the most successful innovations in the industry to address issues related to the environment. Among the available raw materials, starch extracted from different renewable sources is very promising for this purpose, due to its abundance, low-cost compared to other polymers and ability to produce non-toxic films. However, when used alone, pure starch has many limitations, which can be overcome by developing a mixture with other polymers (polymer blends), preferably from renewable and biodegradable sources, such as poly(lactic acid) (PLA). In this context, the absence of literature reviews evidencing the results of the application of films in foods led us to write this article, given the importance of polymer blends produced with different types of starch (cassava, corn, pea, potato, rice and wheat) and the PLA matrix. According to the results, it is clear that polymer blends based on PLA/Starch for food packaging are very promising, already being part of the industries solutions, aiming to minimize the large volume of plastic waste of petrochemical origin discarded in nature. Obviously, as with any technology, more research is needed to further improve the performance of the films, and while much research has made great strides, there are still limitations that prevent the commercialization of these materials.

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Section: Starch: Generalities and Gelatinizationmentioning

confidence: 99%

Polymer blends of poly(lactic acid) and starch for the production of films applied in food packaging: A brief review

Silva

Rios

Santana

2023

Polymers from Renewable Resources

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“…This improvement is contingent upon the establishment of a robust interaction at the interface of the PLA matrix phase and dispersed modifiers. However, a close examination of highly toughened PLA-based systems reveals that the improved toughness comes at the expense of compromising other vital mechanical and thermal characteristics of PLA, including stiffness, creep resistance, and dimensional stability. ,,,, Notably, an inverse relationship is observed, wherein the augmentation of toughness correlates with a reduction in the stiffness and strength of the resulting blends. Therefore, the development of multicomponent PLA-based systems that strike a balance between stiffness and toughness while maintaining acceptable levels of both attributes has consistently posed a challenging task. , …”

Section: Introductionmentioning

confidence: 99%

Design and Synthesis of Polystyrene-Occluded Reactive Core–Shell Particles of Natural Rubber to Balance Stiffness and Toughness in Poly(lactic acid)

Alizadeh,

Habibi,

Razavi Aghjeh

et al. 2024

ACS Appl. Polym. Mater.

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Rubber toughening of poly(lactic acid), PLA, particularly with biobased natural rubber (NR) to address its inherent brittleness, is always at the cost of reducing stiffness and tensile strength. In this work, reactive core−shell particles (RCS particles) of NR with occluded rigid polystyrene (PS) nanodomains inside the NR particles and surface-grafted glycidyl methacrylatemethyl methacrylate copolymer (GMA-co-MMA) were designed and successfully synthesized via a two-step seeded emulsion polymerization technique to balance the stiffness and toughness of the PLA/NR blends. Incorporation of RCS particles resulted in a significant improvement in the impact toughness of PLA. The maximum impact strength of 365 J/m (28-fold increment relative to PLA) was achieved for the PLA/RCS 80/20 blend, while the tensile strength preserved 86% and decrement in Young's modulus was less than 20%, representative of a notable "stiff ness−toughness balance" in these systems. This substantial increase in impact toughness was ascribed to the high level of interfacial adhesion between the RCS particles and PLA matrix and consequently activation of different toughening micromechanisms, particularly massive shear yielding in the entire PLA matrix. On the other hand, both the retained tensile strength and elastic modulus were attributed to the inclusion of rigid PS nanodomains within the NR particles. This innovative strategy, which effectively achieves a balance between stiffness and toughness in high-performance biodegradable plastics based on PLA, represents a significant advancement in the production of alternatives to engineering plastics, especially for use in automotive applications.

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“…The antibacterial methods of materials can be divided roughly into two categories: the endogenous antibacterial method and the exogenous antibacterial method, according to their mechanism . The exogenous antibacterial method refers to the use of external stimuli such as light, − ultrasonic waves, microwaves, magnetic fields, and electric fields to endow materials with sterilization ability, while the endogenous antibacterial method means that the material kills bacteria through its inherent physical or chemical properties, that is, the material can cause the leakage of cytoplasmic components to destroy the bacterial membrane after contact with the bacteria. − Ionic polymers are typical antibacterial materials and have been extensively studied, including the molecular structure of the polymer, − hydrophilic/hydrophobic balance, − the alkyl chain length and structure, − ion species − and ion density, , and other factors on the antibacterial activity . The cationic groups of ionic polymers preferably interact with negatively charged bacterial membranes over zwitterionic mammalian membranes to disrupt membrane integrity, which makes the selective killing of bacteria possible. , Pore formation and nonspecific membrane disintegration are the most common modes of action.…”

Section: Introductionmentioning

confidence: 99%

Robust Ionic Cyclic Olefin Polymers with Excellent Transparency, Barrier Properties, and Antibacterial Properties

et al. 2023

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The development of materials with intrinsic antimicrobial activities has attracted great interest. In this contribution, cyclic olefin polymers (COPs) with excellent mechanical strength and high glass-transition temperature were prepared via ring-opening metathesis polymerization of both a bulky cyclic monomer and a cyclic monomer bearing ionic groups. The ionic COP membranes we obtained showed high antibacterial properties against Gram-negative Escherichia coli (E. coli) and Gram-positive Staphylococcus aureus (S. aureus); especially, the sterilization rate of H-Qa on both bacteria was higher than 99%, and it still showed a high bacteriostatic rate after repeated supplementation of new bacteria for 7 days. In addition, high light transmittance (80–90% in vis), excellent thermal stability (T d,95 > 210 °C), and low water vapor/oxygen transmittance also make the COPs promising as a bacteriostatic material with promising application potential in packaging, medical, and other fields.

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Modification of polylactide by poly(ionic liquid)-b-polylactide copolymer and bio-based ionomers: Excellent toughness, transparency and antibacterial property

Cited by 13 publications

References 81 publications

Polymer blends of poly(lactic acid) and starch for the production of films applied in food packaging: A brief review

Polymer blends of poly(lactic acid) and starch for the production of films applied in food packaging: A brief review

Design and Synthesis of Polystyrene-Occluded Reactive Core–Shell Particles of Natural Rubber to Balance Stiffness and Toughness in Poly(lactic acid)

Robust Ionic Cyclic Olefin Polymers with Excellent Transparency, Barrier Properties, and Antibacterial Properties

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