A Study on Polyurethane Hybrid Nanocomposite Foams Reinforced with Multiwalled Carbon Nanotubes and Silica Nanoparticles

Navidfar, Amir; Sancak, Alkan; Yildirim, K.; Trabzon, Levent

doi:10.1080/03602559.2017.1410834

Cited by 30 publications

(44 citation statements)

References 30 publications

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“…As reported in our previous works [2,7,39,40], this is attributed to dominant reinforcement effect of MWCNTs on the impact strength due to their folding and shock absorbance properties [41]. wt% GNP-24, MWCNT, GNP-1.5 and GNP-5 with 14%, 13.4%, 10.5% and 9.3% enhancements, respectively.…”

Section: Impact Propertiessupporting

confidence: 68%

“…Consequently, it is expected that the mechanical properties of nanocomposites with carbon nanotubes/graphene hybrids could be higher than others [2]. SEM micrographs provide visual evidence of the foam microstructure consisting of three phases of the polymer, nanofillers and bubbles.…”

Section: Morphological Characterizationmentioning

confidence: 99%

“…As a result, the synergistic effect could be obtained by increasing the ratio and content of graphene in the nanocomposites, in which the distance between the graphene, HG, decreases according to Eqs. (1) and (2). Thus, larger fractions of MWCNTs can connect graphene to form the 3D structure.…”

Section: Tensile Propertiesmentioning

confidence: 99%

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Graphene type dependence of carbon nanotubes/graphene nanoplatelets polyurethane hybrid nanocomposites: Micromechanical modeling and mechanical properties

Navidfar

Trabzon

2019

Composites Part B: Engineering

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Micromechanical modeling and mechanical properties of polyurethane (PU) hybrid nanocomposite foams with multi-walled carbon nanotubes (MWCNTs) and graphene nanoplatelets (GNPs) were investigated by mean of tensile strength, hardness, impact strength and modified Halpin-Tsai equation. Three types of graphene, with varied flake sizes and specific surface areas (SSA), were utilized to study the effect of graphene types on the synergistic effect of MWCNT/GNP hybrid nanofillers. The results indicate a remarkable synergetic effect betweenMWCNTs and GNP-1.5 (1:1) with a flake size of 1.5 µm and a higher SSA (750 m 2 /g), which tensile strength of PU was improved by 43% as compared to 19% for PU/MWCNTs and 17% for PU/GNP-1.5 at 0.25 wt% nanofiller loadings. The synergy was successfully predicted using unit cell modeling, in which the calculated data agrees with the experimental results.

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Section: Impact Propertiessupporting

confidence: 68%

Section: Morphological Characterizationmentioning

confidence: 99%

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Graphene type dependence of carbon nanotubes/graphene nanoplatelets polyurethane hybrid nanocomposites: Micromechanical modeling and mechanical properties

Navidfar

Trabzon

2019

Composites Part B: Engineering

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“…Thus, interior wall's vibration of carbon nanotubes and their bending capability against sound waves are improved with the addition of silica nanoparticles [28]. Moreover, higher content of carbon nanotube with silica nanoparticles may increase mechanical properties as being added value to better off in sound absorption properties [29][30].…”

Section: Resultsmentioning

confidence: 99%

Acoustic properties of polyurethane compositions enhanced with multi‐walled carbon nanotubes and silica nanoparticles

Yıldırım

Sancak

Navidfar

et al. 2018

Materialwissenschaft Werkst

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In this study, in order to enhance acoustic properties of polyurethane (PU) foams multi‐walled carbon nanotubes (MWCNT) and/or silica nanoparticles were added to polyol‐isocyanate composition up to 2 wt%, and acoustic properties of polyurethane foam samples with small amount of carbon nanotubes and silica nanoparticles (spherical and/or amorphous types) were determined in the frequency range from 50 Hz up to 6400 Hz. Acoustic properties, especially absorption coefficient of the produced samples were measured for all the prepared samples and results were investigated to come up with the best polyurethane samples that can be applied for sound absorption application at the desired frequency range. It was found that double combination of carbon nanotubes and silica nanoparticles, especially 0.7 wt% carbon nanotubes and 0.2 wt% spherical silica nanoparticle added polyurethane composition has better sound absorption ratio overall all frequencies levels compared to the other samples. Thus, it is possible to obtain polyurethane nanocomposite with a higher amount of carbon nanotube by weight at the same time enhancing sound absorption properties. Moreover, there is a synergic effect between carbon nanotubes and silica nanoparticles when mixed and added into polyurethane matrix at predetermined levels to get enhanced acoustic response with a higher level of carbon nanotube in polyurethane foam.

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“…The epoxy resin nanocomposites possessed higher strength, modulus and good thermal conductivity [39]. Navidfar et al investigated the addition of 0.25 wt% of silica-A, silica-B and MWCNTs to enhance the tensile and impact strength, and calculated that the addition of nanoparticles above 0.25 wt% decreases these values due to agglomeration effects [40]. The optimized mechanical and thermal properties of PU based composites can be used for various applications including hydrogen storage, super capacitors, biosensors, electromechanical actuators, solar cells, aerospace shuttle parts, aeronautical parts, photovoltaic devices, cardiac assist pumps, blood bags, coatings, wind turbine blades, body armour, car parts, semiconductors, and sports equipment [41][42][43][44][45][46][47][48].…”

Section: Introductionmentioning

confidence: 99%

Investigation on mechanical properties of polyurethane hybrid nanocomposite foams reinforced with roselle fibers and silica nanoparticles

et al. 2019

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The aim of this research work is to determine the mechanical, morphological and thermal properties of spherical silica (silica-A), amorphous silica (silica-B) and Roselle fiber (RF) reinforced polyurethane (PU) hybrid nanocomposites. The PU nanocomposites were fabricated with different weight percentages, 0.50 to 1 wt% for silica-A and silica-B, while 1-2 wt% for RF. These experiments were systematically designed and analyzed by response surface methodology in a central composite design approach. As per the design of the experiments, the hybrid PU nanocomposites were prepared by using a one shot process. The mathematical models developed to predict the results obtained were in good coherence with the experimental results, and were within 95% confidence levels for tensile and flexural strength. The optimum weight percentage of Roselle, silica-A and silica-B were 2, 0.78 and 1%, respectively. The optimized environmentally friendly hybrid nanocomposite demonstrated exceptional mechanical and thermal properties.

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A Study on Polyurethane Hybrid Nanocomposite Foams Reinforced with Multiwalled Carbon Nanotubes and Silica Nanoparticles

Cited by 30 publications

References 30 publications

Graphene type dependence of carbon nanotubes/graphene nanoplatelets polyurethane hybrid nanocomposites: Micromechanical modeling and mechanical properties

Graphene type dependence of carbon nanotubes/graphene nanoplatelets polyurethane hybrid nanocomposites: Micromechanical modeling and mechanical properties

Acoustic properties of polyurethane compositions enhanced with multi‐walled carbon nanotubes and silica nanoparticles

Investigation on mechanical properties of polyurethane hybrid nanocomposite foams reinforced with roselle fibers and silica nanoparticles

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