Preparation of novel magnetic polyurethane foam nanocomposites by using core-shell nanoparticles

Nikje, Mir Mohammad Alavi; Moghaddam, Sahebeh Tamaddoni; Noruzian, Maede

doi:10.1590/0104-1428.2193

Cited by 10 publications

(4 citation statements)

References 23 publications

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“…Taking this into account, PUF precursors like polyols have been synthetized with specific chemical functional groups to confer fire retardancy [16,20]. In addition, nanoclays (montmorillonite) [21], titanium dioxide [22], iron oxide magnetic nanoparticles [23], expandable graphite [19,24], and carbon nanostructures [25][26][27][28][29] have also been employed to confer flame retardancy. Often, the combinations of different fillers are used to access improved fire-retardancy behavior due to a synergetic effect [30,31].…”

Section: Introductionmentioning

confidence: 99%

Hybrid Structures Made of Polyurethane/Graphene Nanocomposite Foams Embedded within Aluminum Open-Cell Foam

Pinto

Marques

Vicente

et al. 2020

Metals

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This paper focuses on the development of hybrid structures containing two different classes of porous materials, nanocomposite foams made of polyurethane combined with graphene-based materials, and aluminum open-cell foams (Al-OC). Prior to the hybrid structures preparation, the nanocomposite foam formulation was optimized. The optimization consisted of studying the effect of the addition of graphene oxide (GO) and graphene nanoplatelets (GNPs) at different loadings (1.0, 2.5 and 5.0 wt%) during the polyurethane foam (PUF) formation, and their effect on the final nanocomposite properties. Globally, the results showed enhanced mechanical, acoustic and fire-retardant properties of the PUF nanocomposites when compared with pristine PUF. In a later step, the hybrid structure was prepared by embedding the Al-OC foam with the optimized nanocomposite formulation (prepared with 2.5 wt% of GNPs (PUF/GNPs2.5)). The process of filling the pores of the Al-OC was successfully achieved, with the resulting hybrid structure retaining low thermal conductivity values, around 0.038 W∙m−1∙K−1, and presenting an improved sound absorption coefficient, especially for mid to high frequencies, with respect to the individual foams. Furthermore, the new hybrid structure also displayed better mechanical properties (the stress corresponding to 10% of deformation was improved in more than 10 and 1.3 times comparatively to PUF/GNPs2.5 and Al-OC, respectively).

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Section: Introductionmentioning

confidence: 99%

Hybrid Structures Made of Polyurethane/Graphene Nanocomposite Foams Embedded within Aluminum Open-Cell Foam

Pinto

Marques

Vicente

et al. 2020

Metals

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“…The tensile fractured face of the specimens were imaged with scanning electron microscope (Model: JSM-5800 of JEOL Co., Acceleration voltage: 20 kV, Coating type: gold) at 1000 times zooming [15] . The surface morphology of fabricated specimens can also be studied using scanning electron microscopy [1,5,16] .…”

Section: Scanning Electron Microscopy (Sem)mentioning

confidence: 99%

Comparison of MA-g-PP effectiveness through mechanical performance of functionalised graphene reinforced polypropylene

Natarajan¹,

Rathanasamy²,

Palaniappan

et al. 2020

Polímeros

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“…Nanocomposites are currently used in several fields and new applications are being continuously developed like innerwalls of tires, thin film capacitors for computer chips, O-rings, ball bladders, fiber optic compounds, hand gloves, impellers blades and food packaging, etc [1] . Nanocomposites are materials which fused with nano-sized elements in the matrix to increase the macroscopic properties.…”

Section: Introductionmentioning

confidence: 99%

Reactive compatibilization effect of graphene oxide reinforced butyl rubber nanocomposites

Chinnasamy¹,

Rathanasamy²,

Kumar³

et al. 2020

Polímeros

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The objective of this work is to develop graphene oxide (GO) incorporated butyl rubber (IIR) nanocomposites by three different methods: direct addition approach (DAAM), single step method (SSM) and two step method (TSM). Chlorobutyl rubber was used as a compatibilizer in SSM and TSM. Mechanical properties of developed nanocomposites was increased and gas permeability coefficient was decreased up on addition of GO content in IIR matrix. Maximum technical properties was achieved for the nanocomposite with 1.6 wt.% of GO in all methods was achieved due to better interfacial bonding with IIR matrix. When GO content increases above 1.6 wt.% in IIR matrix leads to agglomeration which resulted in deterioration of mechanical properties. HR-TEM studies revealed that nanocomposites prepared by TSM shows exfoliated structure of GO in IIR matrix due to homogenous distribution when compared to the nanocomposites prepared with DAAM and SSM.

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Preparation of novel magnetic polyurethane foam nanocomposites by using core-shell nanoparticles

Cited by 10 publications

References 23 publications

Hybrid Structures Made of Polyurethane/Graphene Nanocomposite Foams Embedded within Aluminum Open-Cell Foam

Hybrid Structures Made of Polyurethane/Graphene Nanocomposite Foams Embedded within Aluminum Open-Cell Foam

Comparison of MA-g-PP effectiveness through mechanical performance of functionalised graphene reinforced polypropylene

Reactive compatibilization effect of graphene oxide reinforced butyl rubber nanocomposites

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