Reinforcement and toughening mechanisms in polymer nanocomposites – Carbon nanotubes and aluminum oxide

Opelt, Carlos V.; Becker, Daniela; Lepienski, C.M.; Coelho, Luci Boa Nova

doi:10.1016/j.compositesb.2015.01.019

Cited by 68 publications

(51 citation statements)

References 33 publications

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“…Even when properly cured, epoxy resins show a brittle behavior with low fracture toughness ( K Ic ; typically around 0.5–1.0 MPa*m 1/2 ), limiting its structural applications . The literature shows that this is a critical issue for the use of this type of material and it has been under investigation for the last decades, more recently through the inclusion of hard nanoparticles . Carbon Nanotubes (CNTs) are one of the most popular nanofillers, due to the combination of their mechanical, electromagnetic and thermal properties.…”

Section: Introductionmentioning

confidence: 99%

Role and sinergy of block copolymer and carbon nanoparticles on toughness in epoxy matrix

2017

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In this work, the relations between fracture surface roughness in mode I and the content of different carbon nanoparticles, graphene nanoplatelets (GNP) and carbon nanotubes (CNT) were systematically investigated. A block copolymer (BC) was also used to aid the dispersion process considering its role on fracture toughness. Both KIc and GIc were found to increase significantly with the addition of a BC along with carbon nanoparticles. Roughness measurements showed that the value of surface roughness (Ra) does not depend on the toughness, and decreases as the precrack distance increases. In the system with the greatest amount of graphene (0.5 wt%), the agglomerates impaired the material's tenacity and crack deflection with GNP delamination as the fracture mechanism. As for the CNT/epoxy nanocomposites with the BC, strong adhesion between matrix and nanotubes prevented debonding, so the CNTs break, rather than pulling out, after crack bridging, the so called sliding‐fracture mode failure. POLYM. COMPOS., 39:E2262–E2273, 2018. © 2017 Society of Plastics Engineers

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Section: Introductionmentioning

confidence: 99%

Role and sinergy of block copolymer and carbon nanoparticles on toughness in epoxy matrix

2017

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“…Dispersion of CNTs against their agglomeration due to Vander Waals bonding is a key issue which needs to be given prime importance in the initial phase for development of nanocomposites [1,6]. The Pre-dispersion of MWCNTs is carried out by sonication in water.…”

Section: B Methods 1) Dispersion Technique and Preparation Of Specimenmentioning

confidence: 99%

“…Over the years research in field of polymers has revealed that a polymer matrix in different fractions of one or more reinforcing phases, can significantly improve the mechanical properties of polymers. Although CNTs are ideal reinforcement phase but their agglomeration phenomenon eventually results in degradation in the expected efficiencies of the polymer composites [1,4,6], this can be attributed to mainly two reasons: one being non-uniform dispersion of CNT's and the other being insufficient bonding between the polymer/filler interface [1]. Previous research findings show improvement in the mechanical performance of polymers induced with carbon fibers because of their unique aspect ratios [10].…”

Section: Introductionmentioning

confidence: 99%

Influence of Carbon Fibers (CF’s) and Multi Walled Carbon NanoTubes (MWCNT’s) on the mechanical and microstructural properties of polymer based matrix for aviation applications

Neeli¹,

Hunashyal²,

Quadri³

et al. 2016

IJMTER

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Abstract-This research investigates the reinforcement effects obtained by inducing Carbon Fibers (CF's) and Multi Walled Carbon Nanotubes (MWCNT's) at micro and nano level in a polymer based matrix. Percentage composition of the fillers were varied in three different proportions that is 0.15, 0.5, 0.75% by weight of polymer matrix, these compositions were varied in order to check the best efficacy of reinforcement proportion for optimum results. Homogeneous and uniform distribution of nanoparticles in the holding matrix was achieved with the help of Ultrasonicator. The specimens casted as per ASTM standards were tested for mechanical properties like Load deflection criteria, tensile strength. The test results of reinforced specimens were compared with a controlled specimen, to determine the changes obtained because of the reinforcement phase. Spectroscopic analysis was performed using Field Emission Scanning Electron Microscopy (FESEM) to identify the nanofillers interaction with the holding matrix such as dispersion, tailoring of different layers of polymers etc. Energy-dispersive X-ray spectroscopy (EDS) was conducted as an elemental analysis to know the chemical composition of the specimens and their effects. Specimen containing CF's and MWCNTs with 0.15% composition showed optimum results in terms of Ultimate load carrying capacity and tensile strength as compared to a plain epoxy.

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“…Broad interest is signified by numerous publications concerning the studies of their structure, properties and application opportunities [15][16][17][18]. Carbon nanotubes have been used mainly as reinforcements of composite materials with a polymer [19,20] and ceramic matrix [21]; however, growing interest in carbon nanotubes has been seen in the recent years as the reinforcement of composite materials with a matrix made of light metals and their alloys [22,23].…”

Section: Overview Of Applications Of Halloysite and Carbon Nanotubes mentioning

confidence: 99%

Fabrication, Composition, Properties and Application of the AlMg1SiCu Aluminium Alloy Matrix Composite Materials Reinforced with Halloysite or Carbon Nanotubes

Dobrzański¹,

Tomiczek²,

Macek³

2017

Powder Metallurgy - Fundamentals and Case Studies

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In this chapter, the characterisation of the halloysite nanotubes (HNTs) and multiwalled carbon nanotubes (MWCNTs) as the reinforcement in the composite materials was described. The original and author technology of production of the aluminium AlMg1SiCu matrix composite materials reinforced with halloysite or carbon nanotubes using powder metallurgy techniques, including mechanical alloying and hot extrusion and the range of own research in the case to determine microstructure, as well as mechanical properties of those materials was present. It was investigated that the addition of carbon and halloysite nanotubes causes a significant improvement in mechanical properties of the obtained nanocomposites. The investigation results show that the technology used in manufacturing nanocomposite materials can find the practical application in the production of new light metal matrix nanocomposites.

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Reinforcement and toughening mechanisms in polymer nanocomposites – Carbon nanotubes and aluminum oxide

Cited by 68 publications

References 33 publications

Role and sinergy of block copolymer and carbon nanoparticles on toughness in epoxy matrix

Role and sinergy of block copolymer and carbon nanoparticles on toughness in epoxy matrix

Influence of Carbon Fibers (CF’s) and Multi Walled Carbon NanoTubes (MWCNT’s) on the mechanical and microstructural properties of polymer based matrix for aviation applications

Fabrication, Composition, Properties and Application of the AlMg1SiCu Aluminium Alloy Matrix Composite Materials Reinforced with Halloysite or Carbon Nanotubes

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