Effect of the intercalated cation on the properties of poly(o-methylaniline)/maghnite clay nanocomposites

Salavagione, Horacio J.; Cazorla‐Amorós, Diego; Tidjane, Selma; Belbachir, Mohammed; Benyoucef, Abdelghani; Morallón, Emilia

doi:10.1016/j.eurpolymj.2008.01.042

Cited by 20 publications

(11 citation statements)

References 38 publications

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“…The peroxide, the sulfur and the accelerator constitute the “crosslinking agent”. Concerning the clay, we used an untreated sodium montmorillonite called Maghnite, obtained from the Algerian region of Maghnia; supplied by ENOF, Algeria. The cation exchange capacity CEC of this montmorillonite is about 1.15 × 10 −3 mol g −1 22 …”

Section: Methodsmentioning

confidence: 94%

SAXS study applied to reversibly crosslinked isotactic polypropylene/clay nanocomposites

Bouhelal

Cagiao

Benachour

et al. 2010

J of Applied Polymer Sci

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A new route based on reversibly crosslinking reactive extrusion is applied for the development of iPP/clay nanocomposites. Analysis of small-angle X-ray scattering (SAXS) reflections of isotactic polypropylene (iPP)/clay nanocomposites, prepared by two different mixing and chemical crosslinking methods (i.e., conventional and in situ), is presented and results are compared with preceding wide-angle X-ray diffraction (WAXD) results. It is shown that the presence of clay significantly affects the value of long spacing in iPP, as well as the coherence length of lamellar stacks. Results show that the size of the coherently diffracting nanodomains decreases in two stages, first rapidly and then slowly as a function of increasing clay content. This can be attributed to the influence of confined iPP lamellae under the effect of rising number of clay particles. The appearance of the c-crystalline form in the crosslinked iPP/clay nanocomposites is related with the difficulty in chain folding of iPP chains introduced by the chemical crosslinking process, as well as by the presence of clay particles.

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Section: Methodsmentioning

confidence: 94%

SAXS study applied to reversibly crosslinked isotactic polypropylene/clay nanocomposites

Bouhelal

Cagiao

Benachour

et al. 2010

J of Applied Polymer Sci

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“…The d (001) pattern has been increased after the adsorption of As(III), suggesting that arsenic species enters into the interlayer of montmorillonite during the adsorption process (Salavagione et al, 2008). Because of the introduction of polyhydroxy cations into the interlayer space, many active hydroxyl groups are formed.…”

Section: Analysis Of Montmorillonites After Adsorption By Xrdmentioning

confidence: 90%

Algerian natural montmorillonites for arsenic(III) removal in aqueous solution

Zehhaf

Benyoucef

Quijada

et al. 2013

Int. J. Environ. Sci. Technol.

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The adsorption of As(III) from aqueous solutions using naturally occurring and modified Algerian montmorillonites has been investigated as a function of contact time, pH and temperature. Kinetic studies reveal that uptake of As(III) ions is rapid within the first 3 hours and it slows down thereafter. Equilibrium studies show that As(III) shows the highest affinity towards Acidic-montmorillonite even at very low concentration of arsenic. The kinetics of As(III) adsorption on all montmorillonites used is well described by a pseudosecond-order chemical reaction model, which indicates that the adsorption process of these species is likely to be chemisorption. Adsorption isotherms of As(III) fitted the Langmuir and Freundlich isotherm models well. The adsorption of As(III) is pH-dependent obtaining an optimal adsorption at pH 5. From the thermodynamic parameters, it is concluded that the process is exothermic, spontaneous and favorable. The results suggest that M 1 , M 2 and Acidic-M 2 could be used as low cost and effective filtering materials for removal of arsenic from water.

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“…Montmorillonite (Maghnite), organically-unmodified nanoclay, was purchased from the Algerian region of Maghnia and supplied by ENOF, Algeria. The cation exchange capacity of this montmorillonite is about 1.15 × 10 -3 mol/g [17]. Dicumyl peroxide (96 wt% activity) was supplied by NORAX (Germany).…”

Section: Methodsmentioning

confidence: 99%

Study of nanoclay blends based on poly(ethylene terephthalate)/poly(ethylene naphthalene 2,6-dicarboxylate) prepared by reactive extrusion

Zouai¹,

Bouhelal²,

Cagiao

et al. 2014

Journal of Polymer Engineering

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Abstract The success of processing compatible blends, based on poly(ethylene terephthalate) (PET)/poly(ethylene naphthalene 2,6-dicarboxylate) (PEN)/clay nanocomposites in one step by reactive melt extrusion is described. Untreated clay was first purified and functionalized “in situ” with a compound based on an organic peroxide/sulfur mixture and (tetramethylthiuram disulfide) as the activator for sulfur. The PET and PEN materials were first separately mixed in the molten state with functionalized clay. The PET/4 wt% clay and PEN/7.5 wt% clay compositions showed total exfoliation. These compositions, denoted nPET and nPEN, respectively, were used to prepare new nPET/nPEN nanoblends in the same mixing batch. The nPET/nPEN nanoblends were compared to neat PET/PEN blends. The blends and nanocomposites were characterized using various techniques. Microstructural and nanostructural properties were investigated. Fourier transform infrared spectroscopy (FTIR) results showed that the exfoliation of tetrahedral clay nanolayers is complete and the octahedral structure totally disappears. It was shown that total exfoliation, confirmed by wide angle X-ray scattering (WAXS) measurements, contributes to the enhancement of impact strength and tensile modulus. In addition, WAXS results indicated that all samples are amorphous. The differential scanning calorimetry (DSC) study indicated the occurrence of one glass transition temperature Tg, one crystallization temperature Tc and one melting temperature Tm for every composition. This was evidence that both PET/PEN and nPET/nPEN blends are compatible in the entire range of compositions. In addition, the nPET/nPEN blends showed lower Tc and higher Tm values than the corresponding neat PET/PEN blends. In conclusion, the results obtained indicate that nPET/nPEN blends are different from the pure ones in nanostructure and physical behavior.

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Effect of the intercalated cation on the properties of poly(o-methylaniline)/maghnite clay nanocomposites

Cited by 20 publications

References 38 publications

SAXS study applied to reversibly crosslinked isotactic polypropylene/clay nanocomposites

SAXS study applied to reversibly crosslinked isotactic polypropylene/clay nanocomposites

Algerian natural montmorillonites for arsenic(III) removal in aqueous solution

Study of nanoclay blends based on poly(ethylene terephthalate)/poly(ethylene naphthalene 2,6-dicarboxylate) prepared by reactive extrusion

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