Preparation of polymer/clay mineral nanocomposites via dispersion of silylated montmorillonite in a UV curable epoxy matrix

Gianni, Anna Di; Amerio, Ezio; Monticelli, Orietta; Bongiovanni, Roberta Maria

doi:10.1016/j.clay.2007.12.011

Cited by 107 publications

(62 citation statements)

References 29 publications

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“…Distances between the layers which was calculated by the Bragg law are d=15.95 Å, d=4.49 Å and d=4.07 Å, respectively. In FTIR-ATR spectrum, AlPMt showed stretching of hydroxyls bonded to the aluminum and magnesium [Al(Mg)OH or Al(Al)OH] and decreasing in intensity of the band being the characteristic peak of water adsorption in clays (3634 cm -1 ) [5,12,22], the great/wide signal from trapped water molecules (3455 cm -1 ), OH-bending vibration of coordinated H 2 O (1634 cm -1 ), a low intensity peak which has been appointed to the O-H bending mode of the Fe(III)AlOH (920 cm −1 ) [23]. …”

Section: Contact Angle Measurementsmentioning

confidence: 99%

“…In many cases, a mixture of intercalated and exfoliated structures is obtained, thus single platelets and particles are both present in the material. The best final properties are achieved when the clay mineral platelets are fully exfoliated and well dispersed [9][10][11][12]. In order to have a successful development of CPNs, it is necessary to modify natural clay so that it can be compatible with a chosen polymer matrix.…”

Section: Introductionmentioning

confidence: 99%

“…In order to have a successful development of CPNs, it is necessary to modify natural clay so that it can be compatible with a chosen polymer matrix. Moreover, a suitable modification can enhance the interlayer space of the clay mineral and, thus, facilitate a better swelling of the clay mineral itself in an organic polymer or monomer [12].…”

Section: Introductionmentioning

confidence: 99%

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Al-Pillared-Montmorillonite (AlPMt)/Poly(Methyl Methacrylate)(PMMA) Nanocomposites: The Effects of Solvent Types and Synthesis Methods

Kızılduman

Alkan²,

Doğan

et al. 2017

Advances in Materials Science

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Al-pillared-montmorillonite (AlPMt)/poly(methyl methacrylate)(PMMA) nanocomposites were synthesized via melt blending method (MBM) and solution blending method (SBM). FTIR-ATR spectroscopy proved the interaction of AlPMt with PMMA polymer matrix. The thermogravimetric and differential scanning calorimeter analyses showed that the thermal stability and the glass transition temperature (T g ) of polymer matrix shifted to higher temperatures with increasing AlPMt content. Images showed that AlPMt dispersed at nanometer scale in polymer matrix. Contact angle measurements demonstrated that the hydrophilicity of the PMMA increased with incorporation of AlPMt. However, the thermal stability of clay/polymer nanocomposites (CPNs) was significantly changed with CPN preparation method.

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Section: Contact Angle Measurementsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Al-Pillared-Montmorillonite (AlPMt)/Poly(Methyl Methacrylate)(PMMA) Nanocomposites: The Effects of Solvent Types and Synthesis Methods

Kızılduman

Alkan²,

Doğan

et al. 2017

Advances in Materials Science

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“…In fact, the swelling property of the silylated clay minerals is a key factor for intercalation of macromolecules and exfoliation of the silylated clay minerals layers [23,24].…”

Section: Introductionmentioning

confidence: 99%

Silylation of montmorillonite surfaces: Dependence on solvent nature

et al. 2013

Journal of Colloid and Interface Science

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“…By photopolymerization of the modified clay mineral-epoxy resin dispersion, it is possible to obtain a nanocomposite coating having a mixed intercalated/ exfoliated structure [10].…”

Section: Introductionmentioning

confidence: 99%

On photoinduced miniemulsion polymerization of butyl acrylate with clay

Capek

2012

Designed Monomers and Polymers

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The miniemulsion polymerizations (MiEPs) of butyl acrylate (BA) initiated by UV-light have been studied. The oil-soluble dibenzoyl peroxide was used as a photoinitiator. Furthermore, the effect of sodium montmorillonite on kinetics and BA miniemulsion stabilized by anionic sodium dodecylsulfate (SDS) and anionic cetyltrimethylammonium bromide (CTAB) was studied. The polymerization rate vs. conversion curve of the photoinduced MiEP of BA was described by two and four nonstationary rate intervals. Two rate intervals with one rate maximum was observed with CTAB and four nonstationary rate intervals with two rate maxima appeared with SDS. Variation of the rate of polymerization with conversion was discussed in terms of types of initiating radicals and the gel effect.Keywords: photoinduced miniemulsion polymerization; clays; kinetics; composite nanoparticles Introduction For the past 20 years, there has been increased attention paid to the synthesis of nanocomposites based on either intercalated or exfoliated clay dispersed into various matrix polymers [1][2][3][4][5].There are also some studies on the formation of composite nanoparticles by the dispersion polymerization of monomers with clays as was reviewed by Capek [6]. As an alternative to the procedures described above, the preparation of nanocomposites using UV-curing technology has only recently been reported as summarized below.There are also several studies. Monomer polarity, monomer functionality, and the functional groups on the organoclay surfaces significantly impact both the degree of clay exfoliation and photopolymerization kinetics. The addition of polymerizable organoclays increases photopolymerization rate in sufficiently exfoliated clay systems, whereas the rate decreases with lower degrees of clay exfoliation. With clay exfoliation, the effective surface area is increased, resulting in immobilization of a greater number of the propagating radicals and decreased termination [7].A photoinitiator intercalated into montmorillonite had high photoinitiation efficiency, even only 1/100 (w/w) modified clay could initiate the radical polymerization with the 87% acrylate conversion on UV-light exposure. The d spacing could be enlarged to 13.9 nm after photopolymerization with organoclay loading. This approach provided a novel pathway for using the highly exfoliated clay-polymer composites for designing intercalating agents capable of introducing different functional groups [8,9].The functionalization of the sodium montmorillonite (MMTNa) surface with glycidylpropyl-triethoxysylane allows to obtain a new modified clay mineral which can be dispersed

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Preparation of polymer/clay mineral nanocomposites via dispersion of silylated montmorillonite in a UV curable epoxy matrix

Cited by 107 publications

References 29 publications

Al-Pillared-Montmorillonite (AlPMt)/Poly(Methyl Methacrylate)(PMMA) Nanocomposites: The Effects of Solvent Types and Synthesis Methods

Al-Pillared-Montmorillonite (AlPMt)/Poly(Methyl Methacrylate)(PMMA) Nanocomposites: The Effects of Solvent Types and Synthesis Methods

Silylation of montmorillonite surfaces: Dependence on solvent nature

On photoinduced miniemulsion polymerization of butyl acrylate with clay

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