Effect of plate-like particles on properties of poly(lactic acid)/poly(butylene adipate-co-terephthalate) blend: A comparative study between modified montmorillonite and graphene nanoplatelets

This study is aimed at producing biofilms by reinforcement of Magnesium Oxide (MgO) nanoparticles in polylactic acid (PLA) biopolymer using the solvent casting method. In this study MgO nanoparticles (up to 4wt%) were reinforced in PLA biopolymer and their key mechanical, barrier, thermal and antibacterial properties were investigated for food packaging applications. Among the prepared biocomposite films, the 2wt% reinforced PLA films showed the maximum improvement in tensile strength and oxygen barrier properties (up to 29% and 25% respectively) in comparison to pristine PLA films. However, the water vapor barrier properties decreased by nearly 25% due to interfacial behavior and presence of free volumes near MgO nanoparticles. PLA/MgO films also exhibited superior antibacterial efficacy. The 2wt% biofilms caused progressive damage and death of nearly 46% of E. coli bacterial culture after 12h treatment. The produced films are transparent, capable of screening UV radiations and exhibit superior antibacterial efficacy making them an excellent food packaging material.

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“…Furthermore, addition of MgO NPs had no notable effect on the T g or crystallinity of the films. Similar results were also reported by [18].…”

Section: Thermal Propertiessupporting

confidence: 92%

Nano-magnesium oxide reinforced polylactic acid biofilms for food packaging applications

Swaroop

Shukla

2018

International Journal of Biological Macromolecules

194

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“…With increasing concerns about environmental protection and sustainability issues, biobased and biodegradable materials have attracted more and more attention . Poly( l ‐lactic acid) (PLLA), as a kind of bio‐renewable and biodegradable polyester, has gained great attention to meet the requirements of sustainable development in recent years .…”

Section: Introductionmentioning

confidence: 99%

Super‐toughened poly(l‐lactic acid) fabricated via reactive blending and interfacial compatibilization

Zheng

Chen

et al. 2016

Polymer International

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Super‐toughened poly(l‐lactic acid) (PLLA) was prepared by reactive blending of PLLA with poly(ϵ‐caprolactone) (PCL), glycerol and 4,4′‐methylenediphenyl diisocyanate. The reactive interfacial compatibility between PLLA and the formed crosslinked polyurethane (CPU) in the PLLA matrix was studied in detail. The morphology and the toughness of the blends can be tuned by changing the CPU content. The results indicate that the impact strength of PLLA shows a tendency to higher values with the increasing PCL content up to 20 wt%. The notched impact strength of the blend with 20 wt% PCL increases to 55.01 kJ m−2, which is 24.9 times higher than that of neat PLLA. The elongation at break is also increased from 5% to 139.4%, indicating the brittle − ductile transition. The increased interfacial binding strength through the reactive interfacial compatibility and the formation of a CPU network in the PLLA matrix account for the improved toughness of PLLA/CPU blends. Dynamic mechanical analysis results indicate that the compatibility between PLLA and CPU is improved with increasing CPU content resulting in the formation of more interfacial phase. In addition, rheological property measurements indicate that the improvement in storage modulus and complex viscosity is ascribed to the formation of a CPU network in the PLLA matrix. © 2016 Society of Chemical Industry

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“…23 Nevertheless, the compatibility is not sufficient due to the poor interactions and poor interfacial adhesion at a molecular level which lead to non-thermodynamically stable morphologies aer mixing. 24,25 Recently, the PLA/PBAT blends containing two crystalline components have been investigated and documented in the literature.…”

mentioning

confidence: 99%

The effect of MDI on the structure and mechanical properties of poly(lactic acid) and poly(butylene adipate-co-butylene terephthalate) blends

Pan

Yang

et al. 2018

RSC Adv.

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aIn this work, poly(lactic acid) and poly(butylene adipate-co-terephthalate) (PLA/PBAT 50/50) were meltblended in the presence of 4,4 0 -methylene diphenyl diisocyanate (MDI) which acted as a reactive chain extender. The mechanical properties, phase morphology, thermal behavior and crystalline structure of the blends were investigated. Fourier transform infrared measurements revealed that some remarkable chemical interaction had taken place between the two polymers and MDI. Upon increasing the content of MDI, the blends showed increased tensile strength and elongation at break. With the addition of 0-2 wt% MDI, the impact strength of PLA/PBAT-MDI blends increased from 7.0 kJ m À2 to 70.0 kJ m À2. A large shift towards each other in terms of the glass transition temperature was observed by DMA and DSC analysis. SEM micrographs showed not only a reduction in the PBAT phase size but also a significant increase in interfacial adhesion between the PLA and PBAT phases with increasing of MDI. Furthermore, the toughening mechanism of the oriented samples was confirmed by wide-angle X-ray diffraction (WAXD) and small-angle X-ray scattering (SAXS) images; it was possible for the smaller crystallites of blends to form during the course of chain extension.

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Effect of plate-like particles on properties of poly(lactic acid)/poly(butylene adipate-co-terephthalate) blend: A comparative study between modified montmorillonite and graphene nanoplatelets

Cited by 28 publications

References 18 publications

Nano-magnesium oxide reinforced polylactic acid biofilms for food packaging applications

Nano-magnesium oxide reinforced polylactic acid biofilms for food packaging applications

Super‐toughened poly(l‐lactic acid) fabricated via reactive blending and interfacial compatibilization

The effect of MDI on the structure and mechanical properties of poly(lactic acid) and poly(butylene adipate-co-butylene terephthalate) blends

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