Preparation and characterisation of polyamide 11/montmorillonite (MMT) nanocomposites for use in angioplasty balloon applications

Halim, Khairul Anwar Abdul; Farrell, Jay A.; Kennedy, James E.

doi:10.1016/j.matchemphys.2013.09.007

Cited by 37 publications

(31 citation statements)

References 26 publications

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“…As an effective reinforcing filler, sodium montmorillonite (Na‐MMT) clay consisting of numerous nano‐sized lamellar silicate platelets with negative surface charge exhibits many extraordinary performances, e.g. a high surface area to volume ratio, reduced gas permeability, good solid lubrication and ion exchange ability 27,28 . Nonetheless, the unique hydrophilic nature of Na‐MMT makes it incompatible with the majority of hydrophobic polymer‐based materials, thereby leading to serious agglomeration in polymer composites.…”

Section: Introductionmentioning

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: Introductionmentioning

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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“…It is widely used in automotive and offshore oilfield industries due to its good oil and salt water resistance, as well as, excellent piezoelectric and cryogenic properties. Many efforts have been made to improve the mechanical properties of PA11 through preparation of blends with organoclay minerals [7,8]. In these cases, advanced composite properties are commonly associated with full exfoliation of clays (62 wt%) in polymer matrix [8,9].…”

Section: Introductionmentioning

confidence: 99%

“…Many efforts have been made to improve the mechanical properties of PA11 through preparation of blends with organoclay minerals [7,8]. In these cases, advanced composite properties are commonly associated with full exfoliation of clays (62 wt%) in polymer matrix [8,9]. More recently, the effects of multi-walled carbon nanotubes (MWCNT) and nanofibers (CNF), nanosilica (NS), halloysite nanotubes (HNT) and BaTiO 3 nanoparticles on the thermal and mechanical properties of PA11-based composites have also been reported and discussed [10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Thermal and mechanical properties of polyamide 11 based composites reinforced with surface modified titanate nanotubes

et al. 2015

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“…In a further study of PA 11/MMT nanocomposites for use in angioplasty balloon applications it was found that addition of MMT into PA 11 led to a distinct decrease of the half-time of isothermal crystallization. However, the accelerating effect of the nanofiller on the crystallization of PA 11 faded at loadings exceeding 2 m% [40]. Only recently the research of the crystallization behavior of PA 11 in presence of nanofillers has been expanded towards the application conditions relevant in polymer processing, that is, to analysis of the crystallization at rapid-cooling conditions and at high supercooling of the melt [41].…”

Section: Introductionmentioning

confidence: 99%

Crystallization kinetics of polyamide 11 in the presence of sepiolite and montmorillonite nanofillers

2016

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The crystallization kinetics of polyamide 11 (PA 11) in presence of sepiolite and organomodified montmorillonite nanofillers has been studied in a wide range of temperatures and cooling rates by conventional differential scanning calorimetry (DSC) and fast scanning chip calorimetry (FSC). The presence of the nanofillers has a negligible effect on the crystallization temperature of PA 11 at low cooling rates. However, at rapid cooling conditions a distinct nucleating effect of the nanofillers is detected. The critical cooling rate to suppress crystallization increases from 600 K s -1 to about 1000 and 3000 K s -1 in nanocomposites containing sepiolite and montmorillonite, respectively. Regardless the cooling rate applied for solidification the melt, in the nanocomposites the crystallinity of PA 11 is 5 to 10 % higher than in neat PA 11, with the highest values obtained for the montmorillonite-containing system. The nucleating effect of the nanofillers onto the crystallization of the PA 11 is confirmed by analysis of the half-times of isothermal crystallization, and by analysis of the spherulitic superstructure. All measurements proved a saturation of the nucleation efficiency at a loading of the nanofiller of 2.5 m%.

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Preparation and characterisation of polyamide 11/montmorillonite (MMT) nanocomposites for use in angioplasty balloon applications

Cited by 37 publications

References 26 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

Thermal and mechanical properties of polyamide 11 based composites reinforced with surface modified titanate nanotubes

Crystallization kinetics of polyamide 11 in the presence of sepiolite and montmorillonite nanofillers

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