Elaboration of poly(lactic acid)/halloysite nanocomposites by means of water assisted extrusion: structure, mechanical properties and fire performance

Stoclet, Grégory; Sclavons, Michel; Lecouvet, Benoît; Devaux, Jacques; Velthem, Pascal Van; Boborodea, Adrian; Bourbigot, Serge; Sallem-Idrissi, N.

doi:10.1039/c4ra06845a

Cited by 63 publications

(47 citation statements)

References 56 publications

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“…A similar decreasing trend is also manifested at 50% mass loss while increasing the HNT content appears to alleviate the reduction level of T 50% for both unmodified and modified HNT composite mats. The decrease of thermal stability at the above-mentioned two onset temperature levels is ascribed to the catalytic role of HNTs on the PLA pyrolysis with the existence of Si-OH and Al-OH acid sites on HNT external surfaces [48,49]. However, when the mass loss reaches 95%, T 95% values for composite mats conversely have monotonic increases with increasing the HNT content up to maximum 402.9 ºC and 420.8 ºC for 10 wt% HNT and modified HNT inclusions, respectively (T 95% = 370.0 ºC for PLA mats).…”

Section: Thermal Stabilitymentioning

confidence: 96%

Polylactic acid (PLA)/halloysite nanotube (HNT) composite mats: Influence of HNT content and modification

Dong

Marshall

Haroosh

et al. 2015

Composites Part A: Applied Science and Manufacturing

159

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Polylactic acid (PLA)/halloysite nanotube (HNT) composite mats: Influence of HNT content and modification, Composites: Part A (2015), doi: http://dx. AbstractPolylactic acid (PLA)/halloysite nanotube (HNT) composite mats were successfully fabricated via electrospinning. Composite mats reinforced by both unmodified and modified HNTs with a dispersant BYK-9076 were prepared at the HNT contents of 0, 1, 5 and 10 wt%/v. The influence of HNT content and modification was investigated comprehensively, based on several characterisation techniques such as scanning electron microscopy (SEM), Xray diffraction (XRD) analysis, mechanical testing, differential scanning calorimetry (DSC), thermogravimetric analysis (TGA) and Fourier transform infrared spectroscopy (FTIR).Typical modified Halpin-Tsai model and modified Halpin-Tsai laminate hybrid model in conventional composite theory were used, which were found difficult to predict the entire experimental data of elastic moduli for PLA/HNT composite mats, possibly arising from the nanosized effect of both HNTs and some electrospun PLA nanofibres within composite mats.

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Section: Thermal Stabilitymentioning

confidence: 96%

Polylactic acid (PLA)/halloysite nanotube (HNT) composite mats: Influence of HNT content and modification

Dong

Marshall

Haroosh

et al. 2015

Composites Part A: Applied Science and Manufacturing

159

View full text Add to dashboard Cite

show abstract

“…In another study, Prashantha et al [27] incorporated quaternary ammonium salt with benzoalkonium chloride treated HNTs into PLA in a high shear twin-screw extruder using masterbatch dilution process, showing improvements in the mechanical properties due to the better interfacial compatibility induced by the modification of the nanotube surface. Stoclet et al [28] compared the thermomechanical and flame retardant properties of PLA/HNTs nanocomposites prepared using a water-assisted extrusion process and conventional extrusion process. It was found that the injection of water into the polymer melt induced a better dispersion of the HNTs into the PLA matrix and also prevented polymer degradation during the extrusion due to a barrier effect of the water molecules that preferentially locate at the HNT-PLA interface.…”

Section: Introductionmentioning

confidence: 99%

Tailoring the Properties of Thermo-Compressed Polylactide Films for Food Packaging Applications by Individual and Combined Additions of Lactic Acid Oligomer and Halloysite Nanotubes

et al. 2020

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In this work, films of polylactide (PLA) prepared by extrusion and thermo-compression were plasticized with oligomer of lactic acid (OLA) at contents of 5, 10, and 20 wt%. The PLA sample containing 20 wt% of OLA was also reinforced with 3, 6, and 9 parts per hundred resin (phr) of halloysite nanotubes (HNTs) to increase the mechanical strength and thermal stability of the films. Prior to melt mixing, ultrasound-assisted dispersion of the nanoclays in OLA was carried out at 100 • C to promote the HNTs dispersion in PLA and the resultant films were characterized with the aim to ascertain their potential in food packaging. It was observed that either the individual addition of OLA or combined with 3 phr of HNTs did not significantly affect the optical properties of the PLA films, whereas higher nanoclay contents reduced lightness and induced certain green and blue tonalities. The addition of 20 wt% of OLA increased ductility of the PLA film by nearly 75% and also decreased the glass transition temperature (T g ) by over 18 • C. The incorporation of 3 phr of HNTs into the OLA-containing PLA films delayed thermal degradation by 7 • C and additionally reduced the permeabilities to water and limonene vapors by approximately 8% and 47%, respectively. Interestingly, the highest barrier performance was attained for the unfilled PLA film plasticized with 10 wt% of OLA, which was attributed to a crystallinity increase and an effect of "antiplasticization". However, loadings of 6 and 9 phr of HNTs resulted in the formation of small aggregates that impaired the performance of the blend films. The here-attained results demonstrates that the properties of ternary systems of PLA/OLA/HNTs can be tuned when the plasticizer and nanofiller contents are carefully chosen and the resultant nanocomposite films can be proposed as a bio-sourced alternative for compostable packaging applications.

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“…They may work, however, also as potential flame retardants since they may be involved in the development of a thermal insulation layer on the surface of burning material during combustion. Such nanoparticles could be montmorillonite, expandable graphite, halloysite [51], bentonite, carbon nanotubes [52], and sepiolite [53]. Expandable graphite (EG) has low density, and it is non-burnable and capable of insulating the polymer substrate against radiant heat.…”

Section: Poly(lactic Acid) With Nanofiller As Flame Retardantmentioning

confidence: 99%

“…It was suggested that the formation of a char layer during combustion could be the reason for HRR reduction. Stoclet et al [51] produced PLA nanocomposites based on halloysite nanotube (HNT), using waterassisted extrusion. Water-assisted melt compounding of suitable nanofillers is a straightforward and safe method of producing nanocomposites [58].…”

Section: Poly(lactic Acid) With Nanofiller As Flame Retardantmentioning

confidence: 99%

Flame retarded poly(lactic acid): A review

Chow

Teoh

Karger‐Kocsis

2018

Express Polym. Lett.

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Elaboration of poly(lactic acid)/halloysite nanocomposites by means of water assisted extrusion: structure, mechanical properties and fire performance

Abstract: This study shows the interest of elaborating polylactide/halloysite nanocomposites by means of water assisted extrusion (WAE). Besides, WAE gives access to materials with improved fire properties and prevents molecular degradation.

Cited by 63 publications

References 56 publications

Polylactic acid (PLA)/halloysite nanotube (HNT) composite mats: Influence of HNT content and modification

Polylactic acid (PLA)/halloysite nanotube (HNT) composite mats: Influence of HNT content and modification

Tailoring the Properties of Thermo-Compressed Polylactide Films for Food Packaging Applications by Individual and Combined Additions of Lactic Acid Oligomer and Halloysite Nanotubes

Flame retarded poly(lactic acid): A review

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