The effect of organo‐modified silicate nanolayers on the oxygen and water vapor barrier properties of poly(lactic acid)

Hajibeygi, Mohsen; Shabanian, Meisam

doi:10.1002/jccs.201800058

Cited by 4 publications

(3 citation statements)

References 41 publications

(49 reference statements)

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“…Among the various biopolymers, PLA derived from lactic acid is widely used in the development of bionanocomposites, mainly in combination with organically modified silicates, cellulose nanocrystals, carbon based nanofillers, and metal oxides, etc. − Among various popular nanofillers used in polymer nanocomposites, ZnO in the form of nanowires/nanorods/nanoparticles have been reported to improve antimicrobial, optical, and thermo-mechanical properties of the polymer . The interfacial interactions of ZnO nanofiller with a polymer matrix are influenced by the morphology of the nanofiller, which in turn affects the physiochemical properties of the nanocomposites .…”

Section: Introductionmentioning

confidence: 99%

Sonochemical Synthesis of Poly(lactic acid) Nanocomposites with ZnO Nanoflowers: Effect of Nanofiller Morphology on Physical Properties

2021

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This study reports the ultrasound-assisted synthesis of PLA/ZnO nanocomposites with the special feature of a flower-like morphology of ZnO. The ZnO nanoflowers were synthesized via a facile sonochemical method with Zn(NO3)2·6H2O as precursor in different concentrations of 0.025, 0.05, 0.075, and 0.1 M. The as-synthesized ZnO had a flower-like morphology with petals of thickness ≈ 21 nm, width in the range of 200–800 nm, and total BET surface area of 19.87 m2 g–1. Films of PLA/ZnO nanocomposites were synthesized with an ultrasound-assisted solution casting method. Characterization of the nanocomposites revealed excellent thermal, optical, and mechanical properties at a very low loading of ZnO (0.5 wt %): tensile strength = 26–32 MPa, % elongation = 2.9 to 4.7%, highest degradation temperature = 298 °C, glass transition temperature = 52 °C, reduction in UV transmittance (absorption edge 368 nm) = 95%. In addition, PLA/ZnO nanocomposite films possessed efficient antimicrobial properties with >99% reduction of both Gram-negative and Gram-positive bacteria (Escherichia coli and Listeria. monocytogenes) in just 12 to 18 h. These properties are attributed to high interfacial interactions between nanofiller and the PLA matrix resulting from special morphological features of ZnO nanoflowers, and also uniform dispersion of ZnO nanoflowers in the PLA matrix under the influence of sonication.

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Section: Introductionmentioning

confidence: 99%

Sonochemical Synthesis of Poly(lactic acid) Nanocomposites with ZnO Nanoflowers: Effect of Nanofiller Morphology on Physical Properties

2021

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“…Poor processability, brittleness or poor toughness, imperfect durability, low heat deflection temperature and low melt viscosity (due to high crystallinity with thick crystalline cells) are the main causes of essential limitations for PLA development in the lots of fields. To eliminate the mentioned disadvantages, the addition of some miscible plasticisers such as polyethylene glycol is a conventional method which has recently replaced with blending [1][2][3][4][5][6].…”

Section: Introductionmentioning

confidence: 99%

Preparation of an enhanced nanohybrid alloy based on polylactic acid/polycarbonate/nanosilica

Irani-Kolash

Moshiri-Gomchi

Talebi-Liasi

et al. 2020

Plastics, Rubber and Composites

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In order to enhance properties of polylactic acid (PLA), its blend with polycarbonate (PC) and silica nanofiller were prepared and their properties were compared with neat PLA and PLA/ PC alloy. To have a better exchange reaction between PLA and PC and also an enhanced dispersion of nanosilica throughout the organic polymeric matrix, tin(II) 2-ethylhexanoate (TEH) and poly(ethylene-co-glycidyl methacrylate) (PEGM) were used as two different compatibilisers for the transesterification reactions between PLA, PC and nanosilica and chemical grafting of PEGM to PLA, PC and nanosilica. Performed analyses including X-ray diffraction, transmission electron microscopy, differential scanning calorimetry, melt flow index, tensile and thermogravimetric analysis demonstrated that although PEGM, which contains reactive epoxide groups, has a positive effect to promote the properties of its related nanohybrid, the best results were obtained in the presence of TEH as an effective coordination catalyst. Results showed that an enhanced industrial nanocomposite alloy can be fabricated with this efficient catalyst.

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“…Polylactic acid (PLA) as a bio and none‐petrochemical polymer has been widely investigated for various useful applications such as in the biomedical sector, for packaging and agricultural mulch films as short‐term applications . The most important applications of PLA have been used in bottles, cups, and film, as controlled release polymeric matrix for fertilizers, pesticides, and herbicides as well as fibers, paper coating automobile, and household engineering …”

Section: Introductionmentioning

confidence: 99%

Design and preparation of poly(lactic acid) hydroxyapatite nanocomposites reinforced with phosphorus‐based organic additive: Thermal, combustion, and mechanical properties studies

Hajibeygi

Shafiei-Navid

2019

Polymers for Advanced Techs

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A new phosphorus-based organic additive (PDA) was designed and successfully synthesized using a three-component reaction for improvement of the thermal and combustion resistance of polylactic acid (PLA). For compensate for mechanical properties of PLA, hydroxyapatite nanoparticles was modified via in situ surface modification with PDA and was used for preparation of PLA nanocomposites. The structure and morphology as well as thermal, combustion, and mechanical properties of the all PLA systems were investigated. The X-ray diffraction (XRD) and field-emission scanning electron microscopy (FE-SEM) results indicated that the presence of PDA as surface modifier has been necessary for a desirable dispersion of hydroxyapatite (HA) nanoparticles in the PLA matrix. The thermal, combustion, and mechanical properties of the PLA system films were investigated using thermogravimetric analysis (TGA), microscale combustion calorimeter (MCC), and tensile test, respectively. The initial decomposition temperature and char residue of PLA containing 6 mass% of PDA along with 2 mass% HA nanoparticles were increased 20°C and 12% respectively, compared with that of the neat PLA. The peak of heat release rate was decreased from 566 W/g for the neat PLA to 412 W/g for PLA containing 2 mass% of PDA along with 6 mass% HA nanoparticles. By incorporation of only 2 mass% HA nanoparticles and 6 mass% of PDA, the tensile strength was obtained 51 MPa higher than that of the neat PLA.

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The effect of organo‐modified silicate nanolayers on the oxygen and water vapor barrier properties of poly(lactic acid)

Cited by 4 publications

References 41 publications

Sonochemical Synthesis of Poly(lactic acid) Nanocomposites with ZnO Nanoflowers: Effect of Nanofiller Morphology on Physical Properties

Sonochemical Synthesis of Poly(lactic acid) Nanocomposites with ZnO Nanoflowers: Effect of Nanofiller Morphology on Physical Properties

Preparation of an enhanced nanohybrid alloy based on polylactic acid/polycarbonate/nanosilica

Design and preparation of poly(lactic acid) hydroxyapatite nanocomposites reinforced with phosphorus‐based organic additive: Thermal, combustion, and mechanical properties studies

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