Absolute variation of the mechanical characteristics of halloysite reinforced polyurethane nanocomposites complemented by Taguchi and ANOVA approaches

Gaaz, Tayser Sumer; Sulong, Abu Bakar; Kadhum, Abdul Amir H.; Nassir, Mohamed H.; Al-Amiery, Ahmed A.

doi:10.1016/j.rinp.2017.08.066

Cited by 10 publications

(8 citation statements)

References 40 publications

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“…The elongation at break values available in the literature have significantly higher values than those described in this paper. In [37], a 1% HNT-TPU nanocomposite resulted in 144% increase in elongation prior to fracture compared with native TPU. In publications studying similar nanocomposites with 2% HNT content, 67% [33] and 100% [38] increased fracture elongation was measured compared to TPU.…”

Section: Static Tensile Tests Were Performed On Samples Made Of Unmodified Tpu [E] and The Synthesized Nanocomposites [E + 1] [E + 2] Andmentioning

confidence: 96%

“…The work in [34] describes a 44% increase in stress at break also for a nanocomposite with 1% HNT content. Similarly, the authors of [37] presented studies in which a nanocomposite containing 1% HNT showed a 43% increase in fracture stress compared with the TPU matrix. Additionally, 2% additions of HNT to the TPU matrix have been reported to increase the fracture stress by 26% [38].…”

Section: Static Tensile Tests Were Performed On Samples Made Of Unmodified Tpu [E] and The Synthesized Nanocomposites [E + 1] [E + 2] Andmentioning

confidence: 96%

“…The source materials also play a large role. The literature describes nanocomposite production using commercially available TPU while the source materials for this study use chemically modified TPU to reduce hydrophobicity and improve HNT adhesion [34][35][36][37][38].…”

Section: Static Tensile Tests Were Performed On Samples Made Of Unmodified Tpu [E] and The Synthesized Nanocomposites [E + 1] [E + 2] Andmentioning

confidence: 99%

“…After printing, the samples were conditioned according to the standard presented in [37] and then stretched with parameters consistent with injected samples. The sample morphology before and during stretching is shown in Figure 11.…”

Section: Comparison Of Mechanical Properties Of Injected Samples With Printed Samplesmentioning

confidence: 99%

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Influence of the Halloysite Nanotube (HNT) Addition on Selected Mechanical and Biological Properties of Thermoplastic Polyurethane

et al. 2021

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Halloysite nanotube (HNT) additions to the thermoplastic polyurethane (TPU) system were thoroughly evaluated in this study. The resultant composites have been designed for future personalized intervertebral disc implant applications, which requires additional technology to obtain the appropriate geometry unique to each patient. These requirements can be fulfilled using 3D printing. In this work, a technology was developed to produce filaments for fused deposition modeling (FDM). Nanocomposites were prepared using variable HNT content (1, 2, and 3 wt.%). The nanostructure of the resultant composites was confirmed using scanning transmission electron microscopy (STEM). Mechanical tests were used to measure the tensile modulus, stress, and elongation the composites and TPU matrix. Nanocomposites with 2% HNT content were able to withstand 26% increased stress and 50% increased elongation compared to pure TPU before fracturing in addition to a 13% reduction in the friction coefficient. A MTT cytotoxicity assay confirmed the cytotoxicity of all tested materials against human epidermal keratinocyte cells (HaCaT).

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Section: Static Tensile Tests Were Performed On Samples Made Of Unmodified Tpu [E] and The Synthesized Nanocomposites [E + 1] [E + 2] Andmentioning

confidence: 96%

Section: Static Tensile Tests Were Performed On Samples Made Of Unmodified Tpu [E] and The Synthesized Nanocomposites [E + 1] [E + 2] Andmentioning

confidence: 96%

Section: Static Tensile Tests Were Performed On Samples Made Of Unmodified Tpu [E] and The Synthesized Nanocomposites [E + 1] [E + 2] Andmentioning

confidence: 99%

Section: Comparison Of Mechanical Properties Of Injected Samples With Printed Samplesmentioning

confidence: 99%

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Influence of the Halloysite Nanotube (HNT) Addition on Selected Mechanical and Biological Properties of Thermoplastic Polyurethane

et al. 2021

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“…They indicate that the scratch resistance has been improved by adding 5 wt% HNT. Gaaz et al 17 reported that the optimal level of HNT is 1 wt% for improving tensile strength.…”

Section: Introductionmentioning

confidence: 99%

Molecular dynamics simulation of pull-out Halloysite nanotube from polyurethane matrix

Pebdani

Miller

2021

Advances in Mechanical Engineering

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Molecular dynamics (MD) simulation has been applied to study of pull-out of Halloysite nanotubes (HNTs) from a polyurethane (PU) matrix. First, the Machine learning (ML) particle swarm optimization (PSO) method was used to obtain force field parameters for MD from data of density functional theory (DFT) calculations. The current study shows the possibility of using a PSO technique to modify the force field with DFT data with less than 5 kcal/mol discrepancy. Second, we considered the influence of atomic interface on pulling out of HNT from PU. Energy variation has been proposed as the cohesion strength between matrix and nanoparticle. In addition, the best Lennard Jones parameters in the MD simulation make good agreement with an experimental sample stress-strain response.

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Halloysite‐reinforced thermoplastic polyurethane nanocomposites: Physico‐mechanical, rheological, and thermal investigations

Pourmohammadi‐Mahunaki

Haddadi‐Asl

Roghani‐Mamaqani

et al. 2020

Polymer Composites

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Different thermoplastic polyurethane (TPU) nanocomposites with various amounts of halloysite nanotube (HNT) were prepared. The morphological, rheological, thermal, mechanical, and electrical properties of the nanocomposites were also investigated. Fourier‐transform infrared spectroscopy shows that increasing HNT results in increased degree of phase separation. Differential scanning calorimetry thermograms indicate positive effects of HNT on the hard phase crystallinity due to interactions between the surface functional groups of nanotubes and the polyurethane hard phase and also disinclination to form spherulites. According to the dynamic mechanical thermal analysis results, storage modulus of the nanocomposites increased up to 185% with increasing the HNT content in the experimental temperature window, which is in accordance with the tensile strength results. Mechanical analysis indicates that the modulus of nanocomposite increased up to 122% with increasing the HNT content. Rheo‐mechanical spectroscopy results showed that by the addition of low contents of HNT into the TPU matrix, the storage modulus did not show significant variations; however, an upturn in storage modulus was observed by increasing the amount of HNT to 4.2 wt%. In addition, the average volume conductivity of HNT‐reinforced nanocomposites was decreased comparing to the pure TPU even at low amounts of HNT. Therefore, addition of HNT into the TPU matrix resulted in higher mechanical properties in the related nanocomposites.

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Absolute variation of the mechanical characteristics of halloysite reinforced polyurethane nanocomposites complemented by Taguchi and ANOVA approaches

Cited by 10 publications

References 40 publications

Influence of the Halloysite Nanotube (HNT) Addition on Selected Mechanical and Biological Properties of Thermoplastic Polyurethane

Influence of the Halloysite Nanotube (HNT) Addition on Selected Mechanical and Biological Properties of Thermoplastic Polyurethane

Molecular dynamics simulation of pull-out Halloysite nanotube from polyurethane matrix

Halloysite‐reinforced thermoplastic polyurethane nanocomposites: Physico‐mechanical, rheological, and thermal investigations

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