A multi-scale finite element approach to mechanical performance of polyurethane/CNT nanocomposite foam

Javid, Mehdi; Biglari, Hasan

doi:10.1016/j.mtcomm.2020.101081

Cited by 9 publications

(7 citation statements)

References 36 publications

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“…[1] Various nanoparticle fillers have been studied in FPUF including nanocellulose, [26][27][28] nanoclay, [29] nanosilica, [30] and carbon nanotubes. [31] Studies have found nanoparticle fillers can also improve mechanical, thermal, sound absorption, and physical properties, potentially enabling lightweighting. The performance of the final composite material depends on the surface properties, size, shape, particle distribution, intermaterial interactions, and other characteristics of the filler.…”

Section: Introductionmentioning

confidence: 99%

Flexible polyurethane foams reinforced with graphene and boron nitride nanofillers

Tamrakar

İyigündoğdu

et al. 2022

Polymer Composites

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The effect of three types of nanofillers on the physical, mechanical, and thermal properties of flexible polyurethane foams (FPUF) was studied. FPUF with nanofillers are of interest to the automotive industry due to their potential for enhancing compression properties and enabling sustainable foams. Holey and wrinkled flash graphene, and untreated and silane coated boron nitride were tested as fillers up to 0.1 wt% loading level. Flash graphene filled FPUF showed significant improvement in compressive properties, especially at the 0.025 wt% loading level, showing a 22% increase in compressive force deflection at 25% strain and a 17% increase at 50% strain compared to the unfilled control foam sample. Boron nitride nanoparticles, treated and untreated, were shown to be an effective means of reducing wet compression set properties, addressing a key area of concern for sustainable polyols. Wet compression set was reduced by 20%–30% for most boron nitride foams compared to their unfilled control samples. Boron nitride may enable implementation of more sustainable polyols in automotive FPUF. Nanofillers did not significantly improve thermal stability of FPUF.

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Section: Introductionmentioning

confidence: 99%

Flexible polyurethane foams reinforced with graphene and boron nitride nanofillers

Tamrakar

İyigündoğdu

et al. 2022

Polymer Composites

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“…27 The micro PET molecules, polycarbonate, 28 red-mud, anaerobic digestate are chemically synthesized fillers used to strengthen the thermal and mechanical properties of polymeric composite. [28][29][30] The coal ash, 31 concrete, 32 calcium carbonate (CaCO 3 ), 33 carbon nano-fiber (CNF), 34 and carbon nanotubes (CNT) 35 have been used as aggregates 36,37 for moisture resistivity and mechanical and thermic property enhancement. Basalt fiber 38 and sisal fibers are the most widely used natural fibers 21 in polyurethane composite for sustainability and eco-friendly purpose.…”

Section: Introductionmentioning

confidence: 99%

Effect of polyethylene terephthalate fiber reinforced with non‐hydrophilic nano‐silica on the mechanical, thermic, and chemical shielding characteristics of saturated polyurethane composite

Nikam

Rao

Shertukde

2022

J of Applied Polymer Sci

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The research investigates the reinforcing effect of scrap polyethylene terephthalate (PET) fiber, non‐hydrophilic nano‐SiO2(NS‐972) and heat suppressing agents in saturated polyurethane (SPU) composites. PET fiber was obtained through industrial mechanical processing from scraped PET. Thermic and surface morphology of synthesized SPU composites was characterized by using scanning electron microscopy (SEM) and thermogravimetric analysis (TGA). Thermic characteristics of filled PU,NS‐PET fiber (1.5%)‐APM (1:1) (PU‐NF1.5A) composite with (1:1) proportion of additive NS‐PET fiber (0.5–2%) and halogen free fire‐extinguishing additives APM (0–3%) were determined utilizing UL‐94, TGA, critical oxygen index, and smoke density. The tensile properties of the composite improved to 42.27% (4.14 MPa) when the filler content was increased to 1.5%. The WCA, moisture permeability and chemical resistance analysis indicated that fabricated composite films with variable additive content had excellent hydrophobicity and improved resistance to water, humidity, and chemical resistance. TGA data shows the increased thermal resistance of reinforced PU composite is attributed to the increased thermal deterioration temperature, resulted to the higher thermic degradation temperature of the terephthalic and sebacic acids used in the synthesis of PU. Smoke producing capacity of composite PU‐NF1.5A (0–3%) reduced from 82% to 52%. The LOI improved from 19 to 23 (−vol.%) at 3% APM additives.

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“…The developed models have been validated by mold filling experiments as well as combined foam expansion and rheometer experiments. Javid and Biglari 15 studied the mechanical properties of carbon nanotube reinforced polyurethane foam by means of finite element analysis. They found that the multi‐scale finite element model developed by them showed the good agreement with experimental results.…”

Section: Introductionmentioning

confidence: 99%

Study of failure behaviors of rigid polyurethane foam treated under thermal and vibration conditions by experiment and numerical simulation

Qiu

2022

J of Applied Polymer Sci

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Failure mechanism of rigid polyurethane foam (RPUF) treated under different conditions was studied by means of experiments and numerical simulation. Thermal degradation mechanism of RPUF under different temperatures was characterized by thermogravimetric analysis‐Fourier transform infrared spectrometry coupled with gas chromatography–mass spectrometry (TG‐FTIR‐GC–MS) in air and nitrogen atmosphere, respectively. And the vibration failure mechanism of RPUF was analyzed by finite element analysis (FEA) and extended finite element method (XFEM). The experimental results indicated that the failure mode in nitrogen was the broken of carbamate groups, and in air was the broken of carbamate groups and the radical decomposition of ether groups. Numerical simulation suggested that there was vibration stress concentration in the center of foam prism, which was easy to produce sliding and opening fatigue cracks during random vibration.

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A multi-scale finite element approach to mechanical performance of polyurethane/CNT nanocomposite foam

Cited by 9 publications

References 36 publications

Flexible polyurethane foams reinforced with graphene and boron nitride nanofillers

Flexible polyurethane foams reinforced with graphene and boron nitride nanofillers

Effect of polyethylene terephthalate fiber reinforced with non‐hydrophilic nano‐silica on the mechanical, thermic, and chemical shielding characteristics of saturated polyurethane composite

Study of failure behaviors of rigid polyurethane foam treated under thermal and vibration conditions by experiment and numerical simulation

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