scholarly journals Nanocomposite Materials Based on TMDCs WS2 Modified Poly(l-Lactic Acid)/Poly(Vinylidene Fluoride) Polymer Blends

Polymers ◽  
2021 ◽  
Vol 13 (13) ◽  
pp. 2179
Author(s):  
Mohammed Naffakh
Keyword(s):  
Lactic Acid ◽  
Synergistic Effect ◽  
Vinylidene Fluoride ◽  
Melt Processing ◽  
Hybrid Nanocomposites ◽  
Processing Route ◽  
Ternary Blend ◽  
Synthetic Process ◽  
Poly Vinylidene Fluoride ◽  
Blend Nanocomposites

Novel multifunctional biopolymer blend nanocomposites composed of poly(vinylidene fluoride)(PVDF) and tungsten disulfide nanotubes (INT-WS2) that are layered transition metal dichalcogenides (TMDCs) were easily prepared by applying an economical, scalable, and versatile melt processing route. Furthermore, their synergistic effect to enhance the properties of poly(L-lactic acid) (PLLA) matrix was investigated. From morphological analysis, it was shown that the incorporation of 1D (INT)-WS2 into the immiscible PLLA/PVDF mixtures (weight ratios: 80/20, 60/40, 40/60, and 20/80) led to an improvement in the dispersibility of the PVDF phase, a reduction in its average domain size, and consequently a larger interfacial area. In addition, the nanoparticles INT-WS2 can act as effective nucleating agents and reinforcing fillers in PLLA/PVDF blends, and as such, greatly improve their thermal and dynamic-mechanical properties. The improvements are more pronounced in the ternary blend nanocomposites with the lowest PVDF content, likely due to a synergistic effect of both highly crystalline PVDF and 1D-TMDCs nano-additives on the matrix performance. Considering the promising properties of the developed materials, the inexpensive synthetic process, and the extraordinary properties of environmentally friendly and biocompatibe 1D-TMDCs WS2, this work may open up opportunities to produce new PLLA/PVDF hybrid nanocomposites that show great potential for biomedical applications.

scholarly journals Biopolymer Nanocomposite Materials Based on Poly(L-lactic Acid) and Inorganic Fullerene-like WS2 Nanoparticles

Polymers ◽  
2021 ◽  
Vol 13 (17) ◽  
pp. 2947
Author(s):  
Mohammed Naffakh
Keyword(s):  
Lactic Acid ◽  
High Performance ◽  
Transition Metal Dichalcogenides ◽  
Crystallization Rate ◽  
Industrial Applications ◽  
Melt Processing ◽  
Hybrid Nanocomposites ◽  
Processing Route ◽  
Melt Crystallization ◽  
Inorganic Fullerene

In the current study, inorganic fullerene (IF)-like tungsten disulphide (WS2) nanoparticles from layered transition metal dichalcogenides (TMDCs) were introduced into a poly (L-lactic acid) (PLLA) polymer matrix to generate novel bionanocomposite materials through an advantageous melt-processing route. The effectiveness of employing IF-WS2 on the morphology and property enhancement of the resulting hybrid nanocomposites was evaluated. The non-isothermal melt–crystallization and melting measurements revealed that the crystallization and melting temperature as well as the crystallinity of PLLA were controlled by the cooling rate and composition. The crystallization behaviour and kinetics were examined by using the Lui model. Moreover, the nucleating effect of IF-WS2 was investigated in terms of Gutzow and Dobreva approaches. It was discovered that the incorporation of increasing IF-WS2 contents led to a progressive acceleration of the crystallization rate of PLLA. The morphology and kinetic data demonstrate the high performance of these novel nanocomposites for industrial applications.

scholarly journals Miscibility and Crystallinity Study of Poly(vinylidene Fluoride) / Poly(L-Lactic Acid) Polymer Blend

2018 ◽  
Vol 5 ◽  
pp. S130-S136 ◽  
Author(s):  
N.I. Mukri ◽  
T.S. Velayutham ◽  
W.C. Gan ◽  
W.H. Abd Majid
Keyword(s):  
Lactic Acid ◽  
Polymer Blend ◽  
Vinylidene Fluoride ◽  
Poly Vinylidene Fluoride

scholarly journals Electroactive γ-Phase, Enhanced Thermal and Mechanical Properties and High Ionic Conductivity Response of Poly (Vinylidene Fluoride)/Cellulose Nanocrystal Hybrid Nanocomposites

Materials ◽  
2020 ◽  
Vol 13 (3) ◽  
pp. 743
Author(s):  
Erlantz Lizundia ◽  
Ander Reizabal ◽  
Carlos M. Costa ◽  
Alberto Maceiras ◽  
Senentxu Lanceros-Méndez
Keyword(s):  
Ionic Conductivity ◽  
Vinylidene Fluoride ◽  
Mechanical Performance ◽  
Dielectric Behavior ◽  
Hybrid Nanocomposites ◽  
Thermal And Mechanical Properties ◽  
Oh Groups ◽  
Poly Vinylidene Fluoride ◽  
Relevant Role

Cellulose nanocrystals (CNCs) were incorporated into poly (vinylidene fluoride) (PVDF) to tailor the mechanical and dielectric properties of this electroactive polymer. PVDF/CNC nanocomposites with concentrations up to 15 wt.% were prepared by solvent-casting followed by quick vacuum drying in order to ensure the formation of the electroactive γ-phase. The changes induced by the presence of CNCs on the morphology of PVDF and its crystalline structure, thermal properties, mechanical performance and dielectric behavior are explored. The results suggest a relevant role of the CNC surface −OH groups, which interact with PVDF fluorine atoms. The real dielectric constant ε’ of nanocomposites at 200 Hz was found to increase by 3.6 times up to 47 for the 15 wt.% CNC nanocomposite due to an enhanced ionic conductivity provided by CNCs. The approach reported here in order to boost the formation of the γ-phase of PVDF upon the incorporation of CNCs serves to further develop cellulose-based multifunctional materials.

Crystal Form and Phase Structure of Poly(vinylidene fluoride)/Polyamide 11/Clay Nanocomposites by High-Shear Processing

2008 ◽  
Vol 8 (4) ◽  
pp. 1714-1720 ◽  
Author(s):  
Yongjin Li ◽  
Yuko Iwakura ◽  
Hiroshi Shimizu
Keyword(s):  
Phase Structure ◽  
Vinylidene Fluoride ◽  
Crystal Form ◽  
Melt Processing ◽  
Clay Nanocomposites ◽  
High Shear ◽  
Polyamide 11 ◽  
Poly Vinylidene Fluoride ◽  
Shear Processing ◽  
Clay Platelets

Polyamide 11 (PA11)/clay, Poly(vinylidene fluoride) (PVDF)/clay and PVDF/PA11/clay nanocomposites were prepared by melt processing using a high shear extruder. Two types of organoclay with different modified alkyl tails and different polarities were used for PA11 and PVDF nanocomposites. PA11 nanocomposites derived from an organoclay having one alkyl tail show a well-exfoliated morphology but no crystal form transformation, whereas those derived from an organoclay having two alkyl tails give a little worse clay dispersion with the clear α to γ crystal form transition with the addition of the clay. In contrast, the PVDF composites derived from the two organoclays result in a poor dispersion. In addition, PVDF/PA11 blend nanocomposites with a novel morphology have been fabricated using the high-shear extruder. It was found that the clay platelets were selectively dispersed in the PA11 phase with the size of larger than 200 nm, while no clay platelets were located in the PVDF phase and in the PA11 nanodomains with the size of smaller than 200 nm. Moreover, the addition of organoclay shows significant effects on the phase structure of PVDF/PA11 blends.

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