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

Marins, Jéssica Alves; Mija, Alice; Pin, Jean‐Mathieu; Giulieri, Françoise; Soares, Bluma G.; Sbirrazzuoli, Nicolas; Lançon, Pascal; Bossis, Georges

doi:10.1016/j.compscitech.2015.03.008

Cited by 20 publications

(15 citation statements)

References 32 publications

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“…It is generally considered that lower the C FE value better the reinforcing capability of the nanofillers in the polymer nanocomposites. From Table S1, it was found that the C FE values followed a trend of (C FE ) uno > 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 33 the parallely oriented samples and with the application of tensile load in same direction, the polymer chains underwent higher elongation at higher temperature leading to steep decrease in the storage modulus in the rubbery region 57 . Therefore, the parallely...…”

Section: Anisotropic Thermo-mechanical Behavior Of Pla-based Mgcncs Nmentioning

confidence: 96%

Magnetic Cellulose Nanocrystal Based Anisotropic Polylactic Acid Nanocomposite Films: Influence on Electrical, Magnetic, Thermal, and Mechanical Properties

Dhar

Kumar

Katiyar

2016

ACS Appl. Mater. Interfaces

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This paper reports a single-step co-precipitation method for the fabrication of magnetic cellulose nanocrystals (MGCNCs) with high iron oxide nanoparticle content (∼51 wt % loading) adsorbed onto cellulose nanocrystals (CNCs). X-ray diffraction (XRD), Fourier transform infrared (FTIR), and Raman spectroscopic studies confirmed that the hydroxyl groups on the surface of CNCs (derived from the bamboo pulp) acted as anchor points for the adsorption of Fe3O4 nanoparticles. The fabricated MGCNCs have a high magnetic moment, which is utilized to orient the magnetoresponsive nanofillers in parallel or perpendicular orientations inside the polylactic acid (PLA) matrix. Magnetic-field-assisted directional alignment of MGCNCs led to the incorporation of anisotropic mechanical, thermal, and electrical properties in the fabricated PLA-MGCNC nanocomposites. Thermomechanical studies showed significant improvement in the elastic modulus and glass-transition temperature for the magnetically oriented samples. Differential scanning calorimetry (DSC) and XRD studies confirmed that the alignment of MGCNCs led to the improvement in the percentage crystallinity and, with the absence of the cold-crystallization phenomenon, finds a potential application in polymer processing in the presence of magnetic field. The tensile strength and percentage elongation for the parallel-oriented samples improved by ∼70 and 240%, respectively, and for perpendicular-oriented samples, by ∼58 and 172%, respectively, in comparison to the unoriented samples. Furthermore, its anisotropically induced electrical and magnetic properties are desirable for fabricating self-biased electronics products. We also demonstrate that the fabricated anisotropic PLA-MGCNC nanocomposites could be laminated into films with the incorporation of directionally tunable mechanical properties. Therefore, the current study provides a novel noninvasive approach of orienting nontoxic bioderived CNCs in the presence of low magnetic fields, with potential applications in the manufacturing of three-dimensional composites with microstructural features comparable to biological materials for high-performance engineering applications.

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Section: Anisotropic Thermo-mechanical Behavior Of Pla-based Mgcncs Nmentioning

confidence: 96%

Magnetic Cellulose Nanocrystal Based Anisotropic Polylactic Acid Nanocomposite Films: Influence on Electrical, Magnetic, Thermal, and Mechanical Properties

Dhar

Kumar

Katiyar

2016

ACS Appl. Mater. Interfaces

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“…One of them implies the modification of sepiolite with aminopropytrimethoxysilane (APTMS) and the further protonation of the grafted amino groups for their use in the assembly of gold NP to produce catalysts active in the acetylation of phenol derivatives . More recently, sepiolite modified with [3‐(2‐aminoethylamino)propyl]trimetoxisilane (DAPTMS) was co‐assembled to magnetite NP modified with 3‐glycidoxypropyltrimethoxysilane (GLYMO) to produce anisotropic reinforcement in epoxy‐based nanocomposites by using an external magnetic field to induce the alignment of the magnetite‐sepiolite nanofiller …”

Section: In Situ Generation Of Np In Presence Of Sepiolitementioning

confidence: 99%

Immobilization of Nanoparticles on Fibrous Clay Surfaces: Towards Promising Nanoplatforms for Advanced Functional Applications

Aranda

Ruiz‐Hitzky

2018

The Chemical Record

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This account discusses on diverse general approaches employed for the preparation of heterostructured materials based on the immobilization of metal oxides and other nanoparticles on sepiolite and palygorskite fibrous clay minerals, showing the many opportunities of application offered by the resulting materials. Various examples from our own experience have been selected to show how sepiolite acts as a convenient nanoplatform for immobilization of diverse type of nanoparticles, such as TiO , Fe O , Prussian blue, zeolites, layered double hydroxides, carbon nanotubes and graphenes, etc., to produce functional materials for applications in catalysis, environmental remediation, sensing devices, energy production, and others.

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“…In natural state, sepiolite fibers form large bundle-like aggregates, thus, it is necessary to disaggregate the fibers, following the protocol suggested in our previous work [26]. Sepiolite was first ultrasonicated for 40 min in water (dispersion at 10 wt.% of sepiolite) using a high power ultrasound tip (Bioblock Scientfic Vibra Cell 75041, 20 kHz and 750 W) working at 210W (28% of maximum amplitude) by pulses of 5 s spaced by 2 s "off" periods.…”

Section: B Sepiolite Treatmentmentioning

confidence: 99%

“…Sepiolite is a natural microcrystalline-hydrated magnesium silicate, exhibiting a peculiar micro-fibrous morphology constituted by alternating blocks and channels aligned in the direction of the long axis [23,24]. This needle-like morphology with large aspect ratio (1-10 μm in length and 20-40 nm in diameter) makes this natural mineral clay a very promising additive for magneto-and electrorheological fluids [25,26].…”

Section: Introductionmentioning

confidence: 99%

Iron–sepiolite magnetorheological fluids with improved performances

Marins

Plachý

Kuzhir

2018

Journal of Rheology

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This work is focused on the characterization and magnetorheological study of magnetorheological (MR) fluids composed of iron particles and sepiolite fibers, used as a thickening agent. The work is aimed at (a) understanding the effect of the sepiolite addition on the MR response; and (b) finding an appropriate formulation allowing a good sedimentation stability keeping a relatively low off-state viscosity and providing an enhanced MR effect. In the presence of an applied magnetic field, the composite MR fluid exhibits a yielding behavior with a progressive enhancement of the field-induced static yield stress with increasing volume fractions of both iron and sepiolite. Such effect is attributed to a friction between gap-spanning aggregates composed of iron particles and sepiolite-oil viscoplastic matrix. The field-induced dynamic yield stress shows an initial increase with the sepiolite concentration (explained by a partial expulsion of the sepiolite fibers from the aggregates) followed by a decrease. The proposed mechanisms are supported by developed qualitative theoretical models, one of which is based on homogenization approach of Château et al. J. Rheol. 52, 489 (2008). From the practical point of view, the formulation containing 10 vol% of iron and 4 vol% of sepiolite seems to combine a perfect sedimentation stability with moderate values of the plastic viscosity and of the off-state static yield stress (only 5 Pa) and with a relatively important static and dynamic yield stress enhancement (30% and 60%, respectively).

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

Cited by 20 publications

References 32 publications

Magnetic Cellulose Nanocrystal Based Anisotropic Polylactic Acid Nanocomposite Films: Influence on Electrical, Magnetic, Thermal, and Mechanical Properties

Magnetic Cellulose Nanocrystal Based Anisotropic Polylactic Acid Nanocomposite Films: Influence on Electrical, Magnetic, Thermal, and Mechanical Properties

Immobilization of Nanoparticles on Fibrous Clay Surfaces: Towards Promising Nanoplatforms for Advanced Functional Applications

Iron–sepiolite magnetorheological fluids with improved performances

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