Silane functionalization of sodium montmorillonite nanoclay and its effect on rheological and mechanical properties of HDPE/clay nanocomposites

Asgari, Mohammad; Abouelmagd, Ahmed; Sundararaj, Uttandaraman

doi:10.1016/j.clay.2017.06.035

Cited by 88 publications

(54 citation statements)

References 39 publications

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“…The internal vibration peaks of the silicon–oxygen tetrahedron and the aluminium–oxygen octahedron can be found in the wavenumber range 400–800 cm −1 . The intense peaks at 520 and 468 cm −1 belong to the bending vibration of Si–O–Mg and the stretching vibration of Si–O–Fe, 34 respectively.…”

Section: Resultsmentioning

confidence: 99%

Retracted: Influence of organic montmorillonite nanoparticles on the microstructures and thermal and tribological properties of polyethersulfone and polytetrafluoroethylene composites

Yan

Xue

Wang³

et al. 2020

Polymer International

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Because of high wear rate and low thermal deformation temperature, the generalization and application of polytetrafluoroethylene (PTFE) in the field of tribology is restrained to a certain extent. In order to improve the wear resistance and thermal stability of this self‐lubricating polymer, organic montmorillonite (OMMT) nanoparticle reinforced polyethersulfone (PES) and PTFE ternary composites were prepared by the cold molding and vacuum sintering technology. The effects of sodium montmorillonite (Na‐MMT) and OMMT on the microstructures, thermal stabilities and tribological properties of PTFE composites were comparatively studied. The results show that the thermal stability of the PES/PTFE composites is clearly improved by the incorporation of OMMT nanoparticles. Not only the friction coefficients but also the wear rates of OMMT/PES/PTFE composites are less than those of Na‐MMT/PES/PTFE composites under identical tribological tests. Of all these PTFE composites, the PES/PTFE composite containing 10.0 wt% OMMT nanoparticles exhibits the best friction and wear properties (μ = 0.14, k = 5.78 × 10−15 m3 N–1 m−1). This can be attributed to the existence of a polymer multicomponent layer consisting of PTFE, PES and OMMT on the composite surface as well as the formation of uniform PTFE transfer film on the worn surfaces of metal counterparts.

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Section: Resultsmentioning

confidence: 99%

Retracted: Influence of organic montmorillonite nanoparticles on the microstructures and thermal and tribological properties of polyethersulfone and polytetrafluoroethylene composites

Yan

Xue

Wang³

et al. 2020

Polymer International

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show abstract

“…The internal vibration peaks of the silicon-oxygen tetrahedron and aluminum-oxygen octahedron appear at wavenumbers of 800-400 cm −1 . The intense peaks at 520 and 468 cm −1 are attributed to the bending vibration of Si-O-Mg and the stretching vibration of Si-O-Fe [46].…”

Section: Characterization Of Na-mmt/pes/ptfe Ternary Compositesmentioning

confidence: 99%

RETRACTED ARTICLE: Thermal, mechanical, and tribological properties of sodium-montmorillonite-nanoparticle-reinforced polyethersulfone and polytetrafluoroethylene ternary composites

Yan

Xue

et al. 2020

Friction

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Polyethersulfone (PES) and polytetrafluoroethylene (PTFE) blend composites reinforced with sodiummontmorillonite (Na-MMT) nanoparticles were prepared by cold molding and vacuum sintering. The effects of the Na-MMT content on the thermal, nanomechanical, and tribological properties of the Na-MMT/PES/PTFE ternary composites were investigated in detail. The results indicate that at the optimal content, Na-MMT nanoparticles can be uniformly dispersed in the PES/PTFE binary blend composites and generate strong interfacial bonding with the polymeric matrix. Both the thermal stability and the nanomechanical properties of the PES/PTFE binary blend composites are clearly improved by the incorporation of Na-MMT nanoparticles. Among these PTFE-based composites, the Na-MMT/PES/PTFE ternary composite containing 10.0 wt% of Na-MMT nanoparticles exhibits the optimal friction and wear performance. Compared with those of the PES/PTFE blend composite, the friction coefficient (μ = 0.16) and wear rate (k = 2.63 × 10 −14 m 3 /(N•m)) of the 10.0 wt% Na-MMT/PES/PTFE ternary composite are 19.1% and 97.2% lower, respectively. The significant enhancement of the wear resistance of the Na-MMT/PES/PTFE ternary composite is attributable to the formation of PTFE self-lubricating transfer films. The transfer films generated on the worn surfaces of GCr15 steel balls can prevent direct contact between the PTFE composites and their metal counterparts, thereby protecting the polymer composites from damage.

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“…Modification of clay is a common method to improve compatibility by incorporation of surfactant molecules or long-chain tallow amines which raises their inter-platelet distances; known as 'gallery gap'. [30][31][32] Hotta et al used two alkyl tails as surfactants and obtained a greater degree of clay dispersion and mechanical properties enhancement of linear low density polyethylene (LLDPE)/clay nanocomposites than without the use of surfactants. 33 Besides surface modification of clay, compatibilizers like maleated polyolefins are used sometimes to enhance the interaction between nanoclay and the polymers during melt mixing.…”

Section: Introductionmentioning

confidence: 99%

Physico‐mechanical, rheological and gas barrier properties of organoclay and inorganic phyllosilicate reinforced thermoplastic films

Ghosh

Das

Ghosh

et al. 2020

J of Applied Polymer Sci

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Insertion of 2:1 organo-modified phyllosilicate tactoids into rheologically tough thermoplastics has extraordinary potential candidate in oxygen permeability and microstructural toughening. Herein, two commercially abundant clays have been taken for improvement of the thermoplastic's gas barrier property in reasonably low loading. The cause of low loading has been accounted to the usage of maleated polyethylene (MA-g-PE) during the melt mixing tenure. The optimized nanocomposite compression molded film has been tested against uniaxial stretching, which showed a negligible change in the residual permanent set with sacrificing the elongation at break feature. Moreover, nanoindentation was also performed to get the hardness of the sample surface. The flow behavior of the nanocomposites showed thixotropic likely with increasing the frequency. Oxygen transmission rate (OTR) has significantly decreased for tallow amine-modified nanoclay system (cloisite 15A) in compar

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Silane functionalization of sodium montmorillonite nanoclay and its effect on rheological and mechanical properties of HDPE/clay nanocomposites

Cited by 88 publications

References 39 publications

Retracted: Influence of organic montmorillonite nanoparticles on the microstructures and thermal and tribological properties of polyethersulfone and polytetrafluoroethylene composites

Retracted: Influence of organic montmorillonite nanoparticles on the microstructures and thermal and tribological properties of polyethersulfone and polytetrafluoroethylene composites

RETRACTED ARTICLE: Thermal, mechanical, and tribological properties of sodium-montmorillonite-nanoparticle-reinforced polyethersulfone and polytetrafluoroethylene ternary composites

Physico‐mechanical, rheological and gas barrier properties of organoclay and inorganic phyllosilicate reinforced thermoplastic films

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