Relationship between structure and rheological, mechanical and thermal properties of polylactide/Cloisite 30B nanocomposites

Zaidi, Lynda; Bruzaud, Stéphane; Bourmaud, Alain; Médéric, Pascal; Kaci, Mustapha; Grohens, Yves

doi:10.1002/app.31655

Cited by 46 publications

(35 citation statements)

References 48 publications

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“…The hardness and elastic modulus are measured with continuous stiffness measurement and obtained from curves according to the method of Oliver and Pharr [38]. A flattened conical indenter was used [39], this geometry is suitable for the nanocomposites due to the high contact surface, generally inducing results with a low spreading. For each indenter, the area function, which is used to calculate contact area A c from contact depth h c , was carefully calibrated using a silica standard sample, prior to the experiments.…”

Section: Nanoindentation Analysismentioning

confidence: 99%

Development of antimicrobial PCL/nanoclay nanocomposite films with enhanced mechanical and water vapor barrier properties for packaging applications

et al. 2014

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Biodegradable PCL-based nanocomposites were successfully prepared by melt mixing of the poly(e-caprolactone) with two organo-modified Algerian montmorillonites by the cation exchange reactions with two quaternary ammonium surfactants, namely hexadecyl trimethyl ammonium chloride (OMMT1) and hexadecyl pyridinium chloride (OMMT2), with the aim to elaborate antimicrobial PCL/nanoclay composite films with enhanced properties for food packaging applications. PCL-based nanocomposite films containing either OMMT1 or OMMT2 organoclays have displayed mainly intercalated structures as attested by X-ray diffraction patterns and transmission electron microscope images. Glass transition (T g ) and melting (T m ) temperatures of these materials, evaluated by differential scanning calorimetry analysis, were remained almost unchanged. In addition, their thermal stabilities, observed by thermogravimetric analysis, were slightly decreased as compared to the neat PCL matrix. The antibacterial performance of PCL/OMMT1 and PCL/OMMT2 composite films against Staphylococcus aureus (Gram-positive) and Escherichia coli (Gramnegative) was assessed by counting the number of bacteria in the sample. A significant decrease in the number of bacteria is noticed after the addition of 3 wt% of OMMT to the matrix, where a maximum of 94 % of growth inhibition can be reached. Furthermore, these PCL/OMMT nanocomposites have showed an interesting improvement in their several properties that are strategically studied in packaging applications. The Young modulus has increased by 36 and 22 % for (PCL/OMMT1) and (PCL/OMMT2), respectively. Also, the water vapor permeability has decreased by 56 % for (PCL/OMMT1) and 48 % for (PCL/OMMT2).

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Section: Nanoindentation Analysismentioning

confidence: 99%

Development of antimicrobial PCL/nanoclay nanocomposite films with enhanced mechanical and water vapor barrier properties for packaging applications

et al. 2014

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“…From the diverse amount of clay, such as montmorillonite, 24 kaolin, 25 the C30B, a commercially available organically modified clay, was selected, since it has been widely used to reinforce PLA, increasing the tensile modulus by 13% and impact strength by 27% at 3% load, 26 63% the tensile modulus at 5% load, 27 and by decreasing the water vapor permeability by 40% at 5% load. 28 …”

Section: Introductionmentioning

confidence: 99%

A comparison of partially acetylated nanocellulose, nanocrystalline cellulose, and nanoclay as fillers for high‐performance polylactide nanocomposites

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Plackett

Sillard

et al. 2015

J of Applied Polymer Sci

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Partially acetylated cellulose nanofibers (CNF) were chemically extracted from sisal fibers and the performance of those CNF as nanofillers for polylactide (PLA) for food packaging applications was evaluated. Three PLA nanocomposites; PLA/CNF (cellulose nanofibers), PLA/CNC (nanocrystalline cellulose), and PLA/C30B (Cloisite TM 30B, an organically modified montmorillonite clay)were prepared and their properties were evaluated. It was found that CNF reinforced composites showed a larger decrease on oxygen transmission rate (OTR) than the clay-based composites; (PLA/CNF 1% nanocomposite showed a 63% of reduction at 238C and 50% RH while PLA/C30B 1% showed a 26% decrease) and similar behavior on terms of water vapor barrier properties with 46 and 43%, respectively of decrease on water vapor transmission rate at 238C and 50% RH (relative humidity). In terms of mechanical and thermomechanical properties, CNF-based nanocomposites showed better performance than clay-based composites without affecting significantly the optical transparency.

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“…Biodegradable polymers derived from renewable resources have attracted increasing attention due to the great demand in biomedical field, including resorbable sutures, drug delivery systems, tissue scaffolds [4] and also for food packaging applications [5,6]. Polyhydroxyalkanoates (PHA) [7,8] and polylactide (PLA) [9][10][11] have received even more attention in view of sustainability. The interest in polymer blends is constantly increasing because this is an opportunity to finely adjust the functional properties of these materials [12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Mechanical Recycling of Poly(3-Hydroxybutyrate-co-3-Hydroxyvalerate)/Polylactide Based Blends

et al. 2014

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The effects of recycling cycles (up to six repeated cycles) on the structure and properties of neat poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV), neat polylactide (PLA) and PHBV/PLA: 50/50 (wt%) blends elaborated by melt molding process were investigated. The changes in the chemical structure, the morphology and the thermal, mechanical and rheological properties of the recycled materials were studied. The reduction of molecular weights of both PHBV and PLA showed the predominance of chain scission mechanism as a result of degradation inducing an enhancement of PHBV chain mobility, as also revealed by the increasing of the PHBV crystallinity measured using differential scanning calorimetry and wide angle X-ray scattering. Nevertheless, all these effects were significantly smaller for neat PLA and PHBV-PLA blends compared to those of neat PHBV. Contrary to PLA, PHBV seems to be relatively more sensitive to the thermomechanical degradation and the presence of PLA in the PHBV-PLA blend tends to partially prevent the degradation of PHBV. Mechanical results evidenced the great recyclability of PHBV/PLA blends, even after six reprocessing cycles, since the values of mechanical characteristics remain more or less constant compared to the initial ones revealing the preservation of the material mechanical properties. A stabilizing effect of PLA on the recyclability of PHBV-PLA blends was highlighted and it can be concluded that the incorporation of PLA in PHBV/PLA blends might be a promising route to extend the PHBV applications.

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Relationship between structure and rheological, mechanical and thermal properties of polylactide/Cloisite 30B nanocomposites

Cited by 46 publications

References 48 publications

Development of antimicrobial PCL/nanoclay nanocomposite films with enhanced mechanical and water vapor barrier properties for packaging applications

Development of antimicrobial PCL/nanoclay nanocomposite films with enhanced mechanical and water vapor barrier properties for packaging applications

A comparison of partially acetylated nanocellulose, nanocrystalline cellulose, and nanoclay as fillers for high‐performance polylactide nanocomposites

Mechanical Recycling of Poly(3-Hydroxybutyrate-co-3-Hydroxyvalerate)/Polylactide Based Blends

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