Antimicrobial PLA films from environment friendly additives

Turalija, Marina; Bischof, Sandra; Budimir, Ana; Gaan, Sabyasachi

doi:10.1016/j.compositesb.2016.07.017

Cited by 121 publications

(83 citation statements)

References 29 publications

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“…Poly(lactic acid) (PLA), known as PLA, is a biodegradable polymer that is well studied for application in food packaging because it is biodegradable, non-toxic, and has good processing capacity [4,5] However, PLA has particular properties that limit some applications, since it is brittle, [6] and it has high modulus and low elongation at break, similarly to polystyrene. [7] In order to adapt and improve desirable mechanical property of PLA such as flexibility for its application in packaging, modifications are made in the polymer, like copolymerization with other monomers and plasticization.…”

Section: Introductionmentioning

confidence: 99%

Oligomalonate Plasticized Poly(Lactic Acid) Films: Crystallization, Thermal, and Mechanical Properties

Inácio

Lima

Souza

et al. 2018

Macromolecular Symposia

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The biodegradable aliphatic oligoester oligo(trimethylene malonate) (OTM) is synthesized by polycondensation and used to plasticize poly(lactic acid) (PLA). Casting films of PLA and PLA/OTM with concentrations of 1, 5,and 10 wt.% are prepared, and these films are characterized by thermal analyses, rheology, and mechanical tests. DSC revealed that the Tg of PLA films decreases with addition of the oligomer. A decrease of about 10 °C in the Tg is attained when 10 wt% of the oligomer is added to the polymer. Addition of OTM to PLA slightly decreases the thermal stability and does not change significantly the degree of crystallinity (Xc) of the films. Dynamic‐mechanical analyses of these casting films show that the PLA/OTM systems presented lower storage modulus than PLA and mechanical test shows an increased in the elongation at break for PLA films containing the oligoester up to 200%. The results make possible to conclude that the oligomer synthesized from bio‐based monomers acts as a plasticizer of PLA increasing the PLA flexibility.

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Section: Introductionmentioning

confidence: 99%

Oligomalonate Plasticized Poly(Lactic Acid) Films: Crystallization, Thermal, and Mechanical Properties

Inácio

Lima

Souza

et al. 2018

Macromolecular Symposia

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“…With the increasing environmental awareness around the world, the research and development of biodegradable polymers has attracted considerable attention . Poly( l ‐lactic acid) (PLA) is one of the most promising alternatives to non‐degradable commodity polymers.…”

Section: Introductionmentioning

confidence: 99%

“…With the increasing environmental awareness around the world, the research and development of biodegradable polymers has attracted considerable attention. [1][2][3] Poly(L-lactic acid) (PLA) is one of the most promising alternatives to nondegradable commodity polymers. Because PLA is derived from 100% renewable resources and presents many excellent properties in terms of biodegradability, mechanical strength, transparency, and compostability, it has tremendous market potential in biomedical, packaging, and agriculture fields.…”

Section: Introductionmentioning

confidence: 99%

“One‐pot” synthesis of crosslinked silicone‐containing macromolecular charring agent and its synergistic flame retardant poly(l‐lactic acid) with ammonium polyphosphate

Guan

Wen

Yang

et al. 2017

Polymers for Advanced Techs

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A crosslinked silicone‐containing macromolecular charring agent (CSi‐MCA) was synthesized via “one‐pot” process, and it was combined with ammonium polyphosphate (APP) to synergistically improve the flame retardancy of poly(l‐lactic acid) (PLA). The chemical structure of synthesized CSi‐MCA was characterized by Fourier transform infrared spectroscopy and solid‐state 13C nuclear magnetic resonance. The thermal gravimetric analyzer indicated that the CSi‐MCA displayed good thermal stability and high residue via the catalytic crosslinking. Furthermore, the flame retardant effect of CSi‐MCA and APP as intumescent flame retardants in PLA system was investigated by limited oxygen index, UL94, and cone calorimeter test. When the content of CSi‐MCA was 5 wt% and APP was 10 wt% (CSi‐MCA/APP = 1/2), the limited oxygen index value of composites was 33.6 and UL94 classed a V‐0 rating. The peak heat release rate and total heat release of PLA composites containing both APP and CSi‐MCA decreased significantly in comparison with those with APP or CSi‐MCA alone. The flame retardancy mechanism was investigated via analyzing residual chars by scanning electron microscopy and X‐ray photoelectron spectroscopy as well as the possible chemical reaction between APP and CSi‐MCA by thermal gravimetric analyzer and Fourier transform infrared spectroscopy. The results showed that the enhanced flame retardancy was attributed mainly to synergistic effect of CSi‐MCA and APP, which could form a compact, continuous, and protective layer during combustion. Copyright © 2017 John Wiley & Sons, Ltd.

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“…One of the major disadvantages of polymers when used for medical and packaging applications is that they are very susceptible to microbial attack. Recently the incorporation of antimicrobials into plastics for food packaging and medical applications has gained enormous both technical and scientific interest . Of all the antimicrobials, silver (Ag) is the most widely used as polymer additive due to its properties and areas of use.…”

Section: Introductionmentioning

confidence: 99%

“…Recently the incorporation of antimicrobials into plastics for food packaging and medical applications has gained enormous both technical and scientific interest. [5][6][7][8] Of all the antimicrobials, silver (Ag) is the most widely used as polymer additive due to its properties and areas of use. Introducing silver nanoparticles (Ag NPs) into conventional polymers induce antimicrobial properties and results in new materials with enhanced properties.…”

Section: Introductionmentioning

confidence: 99%

Effect of Compatibilizer on Polyethylene/Clay/Silver Nanocomposite Properties

Sánchez-Valdés

Ibarra-Alonso

Ramı́rez-Vargas

et al. 2017

Macromolecular Symposia

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Polyethylene grafted with maleic anhydride (PEgMA) was used as one type of compatibilizer and it was reacted by reactive extrusion with 2 [2 (dimethyl‐amine) ethoxy] ethanol (DMAE) to obtain other type of compatibilizer PEgDMAE. Synthesis and deposition of silver nanoparticles (Ag‐NP) was done by two different methods: In one method (method A), silver nanoparticles were synthetized using ethylene glycol (EG) and pre mixed with compatibilizers using ultrasound with the aim of inducing an interaction between AgNP and polar groups of compatibilizer. Then they were incorporated in a blend with PE and Clay by melt mixing. In other method (method B) silver nanoparticles, were synthetized using EG, premixed with the Clay in a solvent suspension, and then incorporated with PE and compatibilizers. Characterization techniques indicated that an increase in the content of Ag‐NPs, filler dispersion (clay and silver), mechanical and antimicrobial properties were strongly affected by the type and concentration of the compatibilizer and preparation method used. The using of PEgDMAE resulted in a better particle distribution of both sliver and clay into PE. The obtained nanocomposites showed enhanced mechanical and antimicrobial properties with highly exfoliated and dispersed filler into the PE matrix that offers a better option for obtaining hybrid nanocomposites for different applications.

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Antimicrobial PLA films from environment friendly additives

Cited by 121 publications

References 29 publications

Oligomalonate Plasticized Poly(Lactic Acid) Films: Crystallization, Thermal, and Mechanical Properties

Oligomalonate Plasticized Poly(Lactic Acid) Films: Crystallization, Thermal, and Mechanical Properties

“One‐pot” synthesis of crosslinked silicone‐containing macromolecular charring agent and its synergistic flame retardant poly(l‐lactic acid) with ammonium polyphosphate

Effect of Compatibilizer on Polyethylene/Clay/Silver Nanocomposite Properties

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