Synthetic talc as a new platform for producing fluorescent clay polyurethane nanocomposites

Dias, Guilherme A. D.; Prado, Manoela; Ligabue, Rosane Angélica; Poirier, Mathilde; Roux, Christophe Le; Martin, F.; Fery–Forgues, Suzanne; Einloft, Sandra

doi:10.1016/j.clay.2018.03.012

Cited by 12 publications

(18 citation statements)

References 46 publications

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“…Unlike hydrophobic natural talc, synthetic talc can be obtained in a gel form due to their hydrophilic character facilitating their use in waterbased polymer matrix nanocomposite synthesis [31,32,35,37]. Due to this myriad of possible synthetic talc structures and properties, these new materials can be used as fillers for solvent-based polyurethane nanocomposites [38,39] as well as for WPUs nanocomposites [40] preparation resulting in fluorescent nanocomposites [40], magnetic nanocomposites [23,41] among others possibilities.…”

Section: Introductionmentioning

confidence: 99%

The influence of Ni/Mg content of synthetic Mg/Ni talc on mechanical and thermal properties of waterborne polyurethane nanocomposites

et al. 2020

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Waterborne polyurethanes (WPUs) present interesting properties when compared to their solvent-based counterpart besides being organic solvent free. WPUs also present some drawbacks such as low thermal and mechanical properties. The goal of this work was to synthesize and characterize new synthetic talc in a gel form with different magnesium (Mg) and nickel (Ni) ratios in their chemical structure Si 4 (Mg x Ni 1−x ) 3 O 10 (OH) 2 with 0 < x < 1 and to evaluate their influence on mechanical and thermal properties when used as filler in WPU matrix in order to obtain new nanocomposites as well. WPU/STMg x Ni y nanocomposites were prepared by physical mixing and characterized by Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), differential scanning calorimetry (DSC), thermogravimetric analysis (TGA), atomic force microscopy (AFM) and mechanical dynamic analysis (DMTA). Improvements in nanocomposites mechanical properties in relation to pristine WPU matrix were observed for samples with higher synthetic talc content. The variation of the amount of Mg and Ni in synthetic talc composition altered the storage and loss modules results being higher for nanocomposites obtained with synthetic talc samples with higher Ni content in their compositions. Tg varied according to synthetic talc content. Synthetic talc with different metal content in their composition changes WPU nanocomposites thermal and mechanical properties. These fillers can be used to design nanocomposites with desired applications.

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Section: Introductionmentioning

confidence: 99%

The influence of Ni/Mg content of synthetic Mg/Ni talc on mechanical and thermal properties of waterborne polyurethane nanocomposites

et al. 2020

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“…A Bruker 4 mm standard and triple channels MAS probes were used to perform all the experiments at a spinning speed of 12.5 kHz. The 1 H, 23 Na, 13 C and 29 Si chemical shifts were referenced to external standards of TMS, NaCl aqueous solution (1M), adamantane and TMS, respectively. 23 Na direct polarization MAS NMR spectra were recorded by small-flipangle technique with a pulse of 1 µs (p/8), 3 s for the recycle delay and 1024 accumulations.…”

Section: Methodsmentioning

confidence: 99%

“…Compared to natural micron-sized particles, the synthetic particles present also the theoretical advantage of being almost pure from a chemical and mineralogical point of view since neither cation substitutions nor other mineral phases occur in principle during the synthesis except for traces. The design of such particles thereby paved the way to new domains of applications, such as in the fields of polymers [12][13][14][15][16] and cosmetics (14 patents registered by L'Oréal). 17 A deep understanding of the surface chemistry of nano-layered silicates is highly necessary for scientific and industrial purposes.…”

Section: Introductionmentioning

confidence: 99%

Complementarity of Density Functional Theory and Nuclear Magnetic Resonance Tools To Probe the Nano-Layered Silicates Surface Chemistry and Morphology

et al. 2019

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By combining experimental spectroscopic, structural and physical characterizations, and extensive Density Functional Theory (DFT) simulations, unprecedented insight is gained on the local surface properties of synthetic talc nanoparticles, their structure, morphology and particle size distribution. Basically, the Nuclear Magnetic Resonance (NMR) chemical shifts profiles of these nano-layered silicates were dissected thoroughly and revealed the existence of bulk and surface contributions in the 1 H and 29 Si spectra. Beyond the fact that a significant knowledge has been acquired on the overall structure of the synthetic talc nanoparticles (mixture of defective and non-defective layers, with defects rejected on the external interfaces), the highlighting of these signals enabled to access the average morphologies and particle sizes of the samples by decomposing the 29 Si NMR profiles into Lorentzian contributions. Finally, the particle size distributions in number were also described in terms of a Log-normal law.These distributions were compared to the particle sizes obtained from X-ray Diffraction (XRD), Brunauer−Emmett−Teller measurements (BET) and Dynamic Light Scattering (DLS) methods.The distributions of gyration radii determined by DLS are shown to match the distributions in size in consistence with the same morphology.

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“…[27] More recently, we investigated the effect of different synthetic talc on the properties of the polyurethane nanocomposites. [28][29][30] The focus of the present work is to compare the use of different metal-activated carbons obtained from biomass [31] (low cost source) as fillers to synthesize PE nanocomposites with good thermal, mechanical, and magnetic properties by the melt mixing technique.…”

Section: Introductionmentioning

confidence: 99%

Metal activated carbon as an efficient filler for high‐density polyethylene nanocomposites

et al. 2020

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interesting properties of magnetic nanocomposites have attracted attention of both academic and industrial researchers. In this work, thermal, mechanical, morphological, and magnetic properties of polyethylene (PE) nanocomposites were inspected using carbon-based magnetic fillers (C Ni, C Co, and C Fe).The melt mixing method was employed to prepare the nanocomposites using small amounts of filler ranging up to 2 wt%. Wood sawdust pyrolysis produces carbonized material activated by Ni, Co, or Fe salts and used as filler. The structural analysis was carried out using Fourier transform infrared spectroscopy indicating that the polymer chemical structure remains unaltered with the filler addition. Thermal stability of nanocomposites as well as the determination of metal amount in the carbon-based fillers was investigated by thermogravimetric analysis. Filler introduction enhanced the onset and the maximum degradation temperatures up to 11 C and 8 C, respectively. The crystallization and melting temperatures examined by differential scanning calorimetry remained unchanged as compared to neat PE whereas the percent crystallinity was improved up to 8%. The incorporation of the filler leads to the improvement in the elastic modulus of the polymer matrix. The addition of 2.0 wt% of the metal-carbonized filler in the diamagnetic polymer resulted in a thermoplastic nanocomposite with ferromagnetic behavior.

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Synthetic talc as a new platform for producing fluorescent clay polyurethane nanocomposites

Cited by 12 publications

References 46 publications

The influence of Ni/Mg content of synthetic Mg/Ni talc on mechanical and thermal properties of waterborne polyurethane nanocomposites

The influence of Ni/Mg content of synthetic Mg/Ni talc on mechanical and thermal properties of waterborne polyurethane nanocomposites

Complementarity of Density Functional Theory and Nuclear Magnetic Resonance Tools To Probe the Nano-Layered Silicates Surface Chemistry and Morphology

Metal activated carbon as an efficient filler for high‐density polyethylene nanocomposites

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