Controlled interactions between silanol groups at the surface of sepiolite and an acrylate matrix: Consequences on the thermal and mechanical properties

Volle, Nicolas; Giulieri, Françoise; Burr, Alain; Pagnotta, Sophie; Chaze, Anne-Marie

doi:10.1016/j.matchemphys.2012.03.011

Cited by 28 publications

(22 citation statements)

References 50 publications

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“…Mass transport barrier effect of sepiolite also prohibits the diffusion of oxygen from air to the polymer backbone and hence delays the oxidative process. [35] As it is shown in Table 1, C.Y. value of pure PEI at 700°C was 57.2% of the initial total mass.…”

Section: Thermal Behaviormentioning

confidence: 79%

Poly(ether‐imide) and related sepiolite nanocomposites: investigation of physical, thermal, and mechanical properties

Tabatabaei-Yazdi

Mehdipour‐Ataei

2015

Polymers for Advanced Techs

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Novel poly(ether-imide) and sepiolite nanocomposites were synthesized based on a unique diamine monomer with the aim of improving physical and mechanical properties of final polyimide films. The diamine was polycondensed with 4,4′-(hexafluoroisopropylidene) diphthalic anhydride to produce related poly(ether amic acid) prepolymer. Pure poly(ether-imide) and nanocomposite films were prepared via thermal imidization process of poly(ether amic acid). Coexistence of ether, pyridine, and phenylene functional groups in the diamine chemical structure resulted in flexible polyimide films with significant thermal, physical, and mechanical properties. Thermal stability, glass-transition temperature, dimensional stability, and tensile properties of polymer and nanocomposites were studied and compared. Morphology of nanocomposites was also investigated using scanning and transmission electron microscopic methods to study the distribution and dispersion behavior of sepiolite nanofibers in the polyimide matrix. By introduction of sepiolite nanoparticles, overall improvement of properties was observed in respect to pure polyimides.

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Section: Thermal Behaviormentioning

confidence: 79%

Poly(ether‐imide) and related sepiolite nanocomposites: investigation of physical, thermal, and mechanical properties

Tabatabaei-Yazdi

Mehdipour‐Ataei

2015

Polymers for Advanced Techs

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“…2(C)). The first decomposition step of both samples, between 25 and 150°C, corresponds to the physical desorption of water molecules on the sepiolite surface [21,23]. Pure sepiolite also presents three well defined degradation steps, from 200 to 900°C, attributed to the structural water, the dehydroxylation of silanol and magnesium hydroxide present in the clay mineral.…”

Section: Characterization Of the Daptms-modified Sepiolite Fibersmentioning

confidence: 95%

“…The isolated fibers were dried at 100 °C for 12 hours before used, as suggested in the literature [20,21]. The dried sepiolite fibers were silanized according to the literature [21]. In a typical procedure, 5 g of sepiolite fibers were dispersed into 100 mL of ethanol using an ultrasound tip for 20 minutes.…”

Section: Synthesis Of Amino-modified Sepiolite (Sep/daptms)mentioning

confidence: 99%

Anisotropic reinforcement of epoxy-based nanocomposites with aligned magnetite–sepiolite hybrid nanofiller

Marins

Mija

et al. 2015

Composites Science and Technology

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“…Thus, the functionalization of sepiolite was achieved using 3-aminopropyltriethoxysilane (APTES) and [(3-(2-aminoethylamino) propyl)]trimethoxysilane (AEPTMS) selected as organosilanes bearing complexing amine groups known to display strong affinity for metal ions. The modified clays were characterized by X-ray powder diffraction (XRD, Fourier transform infrared (FTIR) spectroscopy, Thermogravimetric (TG) and Differential thermal analysis (DTA [9,45]. The claysized particles with equivalent spherical diameter < 2 µm were used in further experiments.…”

Section: Electrochemistry Experimentsmentioning

confidence: 99%

Nanohybrid materials from amine functionalization of sepiolite: Preparation, characterization and application as electrode modifiers for the electroanalytical detection of heavy metal ions

Ymélé¹,

Sherman²,

Francis³

et al. 2017

Adv Mater Sci

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Sepiolite-based organic-inorganic hybrid materials bearing amine groups were prepared by chemical grafting using 3-aminopropyltriethoxysilane (APTES) and [(3-(2-aminoethylamino)propyl)]trimethoxysilane (AEPTMS). The structural properties of the pristine sepiolite and the obtained composites materials were analysed using XRD, TG/DTA analysis and FTIR. The surface ion exchange ability of the functionalized clay minerals coated as thin film on glassy carbon electrodes and exposed to [Ru(NH 3 ) 6 ] 3+/2+ or [Fe(CN) 6 ] 3−/4-electroactive probes was also investigated by multisweep cyclic voltammetry (MSCV) and by Electrochemical impedance spectroscopy (EIS). From MSCV data, it was found that sepiolite and organosepiolites display a permselective behavior depending on the charge on its surface while EIS results showed that the functionalization of sepiolite enhanced its conductivity. The organosepiolites were tested in a comparative way for the voltammetric detection of mercury (II), and some preliminary experiments based on differential pulse voltammetry highlighted the interest of using the most sensitive organoclay (i.e. the sample grafted by AEPTMS) for the electroanalysis of several heavy metals in the same solution.

show abstract

Controlled interactions between silanol groups at the surface of sepiolite and an acrylate matrix: Consequences on the thermal and mechanical properties

Cited by 28 publications

References 50 publications

Poly(ether‐imide) and related sepiolite nanocomposites: investigation of physical, thermal, and mechanical properties

Poly(ether‐imide) and related sepiolite nanocomposites: investigation of physical, thermal, and mechanical properties

Anisotropic reinforcement of epoxy-based nanocomposites with aligned magnetite–sepiolite hybrid nanofiller

Nanohybrid materials from amine functionalization of sepiolite: Preparation, characterization and application as electrode modifiers for the electroanalytical detection of heavy metal ions

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