Properties of poly(lactic acid)/montmorillonite/carbon nanotubes nanocomposites: determination of percolation threshold

Sanusi, Olawale Monsur; Benelfellah, Abdelkibir; Papadopoulos, Lazaros; Terzopoulou, Zoi; Bikiaris, Dimitrios N.; Hocine, Nourredine Aït

doi:10.1007/s10853-021-06378-z

Cited by 27 publications

(12 citation statements)

References 80 publications

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“…The rheological curves of 180°C show obvious differentiation regions between P/G‐100 and P/G‐150. When the P‐PVC/graphite composites are above P/G‐100 (23.6 vol%), there is a more obvious modulus platform in the low frequency region, confirming the presence of viscoelastic percolation at 180°C 29 . In the range of control ~P/G‐100 (0–23.6 vol%), the graphite is mainly dispersed in the PVC matrix in the form of flake, and the melt of the mixture still exists in a liquid‐like state.…”

Section: Resultsmentioning

confidence: 83%

Rheological behaviors of plasticized polyvinyl chloride thermally conductive composites with oriented flaky fillers: A case study on graphite and mica

Zhang

2022

J of Applied Polymer Sci

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In this study, two oriented flaky fillers in plasticized polyvinyl chloride (P‐PVC) matrix were respectively compared on some rheological behaviors such as dynamic rheological behavior, melt flow rate, and Barus effect. By comparing and analyzing the rheological behaviors and thermal conductivity of P‐PVC/graphite and P‐PVC/mica composites with oriented fillers, it is found that the P‐PVC/graphite composites have obvious percolation thresholds of viscosity, modulus and thermal conductivity at 23.6 vol%. However, P‐PVC/mica composites did not show similar phenomenon. Moreover, the variable parameter K′ in the modified Kerner–Nielson equation was used to relate the rheological behavior, percolation concentration and thermal conductivity of the composites, and the formation of the filler network was analyzed through the rheological behavior to explain the influence of the percolation threshold in the composites caused by the change of internal structure on the thermal conductivity. It has important guiding significance for the mechanism research and comprehensive performance improvement of the filled composites.

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Section: Resultsmentioning

confidence: 83%

Rheological behaviors of plasticized polyvinyl chloride thermally conductive composites with oriented flaky fillers: A case study on graphite and mica

Zhang

2022

J of Applied Polymer Sci

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“…Other carrageenan characteristics were observed through the 920 and 844 cm –1 peaks, representing the 3,6-anhydrous- d -galactose and galactose-4-sulfate bonds, respectively . Peaks at 511 cm –1 also appear in all bionanocomposites samples and represent the Si–O bending of MMT . The FTIR spectrum does not show any peaks from Ag metal as the Ag metal peak is outside the spectrum of analysis at a range around 386 cm –1 .…”

Section: Resultsmentioning

confidence: 96%

Characteristic Improvement of a Carrageenan-Based Bionanocomposite Polymer Film Containing Montmorillonite as Food Packaging through the Addition of Silver and Cerium Oxide Nanoparticles

Genecya,

Adhika,

Sutrisno

et al. 2023

ACS Omega

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Plastic has become an essential ingredient in social life, especially in its function as food packaging. An increase in plastic consumption can have a big impact, especially on environmental issues, because of the plastic waste produced. Substituting petroleum-based plastic with bionanocomposites can be done to reduce the impact of environmental issues caused by plastic waste. The purpose of this study is to produce nanoparticle-incorporated bioplastics, which can be applied as alternative food packaging, especially as petroleum-based plastic substitutes, and as food packaging that has added value in the form of antimicrobial properties. In addition, nanoparticles are also intended to improve the characteristics of bioplastics such as improving mechanical properties and film permeability as well as increasing the barrier properties of bioplastics against ultraviolet rays that can damage packaged food. Bionanocomposites with modified forms were investigated by various characterization such as Fourier transform infrared (FTIR), mechanical property testing of bioplastics as well as analysis of water vapor permeability (WVP), scanning electron microscopy (SEM), thermogravimetric analysis (TGA), differential scanning calorimetry (DSC), UV–visible spectrophotometry (UV–vis), and antimicrobial testing. Visible improvement of mechanical and UV barrier properties was seen in bionanocomposites with the addition of cerium nanoparticles. Furthermore, we have also demonstrated the antibacterial activity properties of nanoparticle-loaded bionanocomposites, which can add value to their use as food packaging. These results indicate that carrageenan-based bionanocomposites have a high potential for positive application in food packaging to ensure food safety and extend the shelf life of packaged foods.

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“…However, for concentrations above 2.0% MWCNT, the T g shifts towards higher temperatures. Perhaps the increase of MWNCT above 2% might generate more nucleation sites that improve crystallinity [ 21 ]. The T g values obtained from the DSC thermograms are reported in Table 4 .…”

Section: Resultsmentioning

confidence: 99%

Composite Polymer Electrolytes Based on (PEO)4CF3COOLi and Multi-Walled Carbon Nanotube (MWCNT)

2022

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The addition of nanoparticles as fillers has a significant influence in modifying the dynamic conditions and avoiding crystallization in polymer composites. In this work, (PEO)4CF3COOLi electrolyte and multi-walled carbon nanotubes (MWCNTs) were used to prepare composites by a solution method. The formation of the new composite was evidenced by the experimental results obtained from DSC analysis and infrared spectroscopy (FTIR). The impedance spectroscopy analysis shows a notable decrease in the resistance, which is attributed to an interaction between the oxygen of the polymer and the Li+ cations of the salt, and the interactions between the electrolyte and the MWNTs. Values of dc conductivity of 8.42 × 10−4 S cm−1 at room temperature are obtained at a concentration of 2.0 wt.% MWCNT in the whole electrolyte. The results indicate that membranes can be used in technological devices such as batteries and gas or moisture sensors.

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Properties of poly(lactic acid)/montmorillonite/carbon nanotubes nanocomposites: determination of percolation threshold

Cited by 27 publications

References 80 publications

Rheological behaviors of plasticized polyvinyl chloride thermally conductive composites with oriented flaky fillers: A case study on graphite and mica

Rheological behaviors of plasticized polyvinyl chloride thermally conductive composites with oriented flaky fillers: A case study on graphite and mica

Characteristic Improvement of a Carrageenan-Based Bionanocomposite Polymer Film Containing Montmorillonite as Food Packaging through the Addition of Silver and Cerium Oxide Nanoparticles

Composite Polymer Electrolytes Based on (PEO)4CF3COOLi and Multi-Walled Carbon Nanotube (MWCNT)

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