Nano-modified adhesive by graphene: the single lap-loint case

Neto, Almir Silva; Cruz, Diego Thadeu Lopes da; Ávila, Antônio F.

doi:10.1590/s1516-14392013005000022

Cited by 38 publications

(9 citation statements)

References 8 publications

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“…A slight increase (∼3%) of the main peak (around 25.5°) was observed for the integrated sample. This is due to the detection of graphene present in the conductive resin forming the conductive layer. , …”

Section: Resultsmentioning

confidence: 92%

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Electrospun Piezoelectric Polymer Nanofiber Layers for Enabling in Situ Measurement in High-Performance Composite Laminates

et al. 2018

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This article highlights the effects from composite manufacturing parameters on fiber-reinforced composite laminates modified with layers of piezoelectric thermoplastic nanofibers and a conductive electrode layer. Such modifications have been used for enabling in situ deformation measurement in high-performance aerospace and renewable energy composites. Procedures for manufacturing high-performance composites are well-known and standardized. However, this does not imply that modifications via addition of functional layers (e.g., piezoelectric nanofibers) while following the same manufacturing procedures can lead to a successful multifunctional composite structure (e.g., for enabling in situ measurement). This article challenges success of internal embedment of piezoelectric nanofibers in standard manufacturing of high-performance composites via relying on composite process specifications and parameters only. It highlights that the process parameters must be revised for manufacturing of multifunctional composites. Several methods have been used to lay up and manufacture composites such as electrospinning the thermoplastic nanofibers, processing an inter digital electrode (IDE) made by conductive epoxy–graphene resin, and prepreg autoclave manufacturing aerospace grade laminates. The purpose of fabrication of IDE was to use a resin type (HexFlow RTM6) for the conductive layer similar to that used for the composite. Thereby, material mismatch is avoided and the structural integrity is sustained via mitigation of downgrading effects on the interlaminar properties. X-ray diffraction, Fourier transform infrared spectroscopy, energy dispersive X-ray spectroscopy, and scanning electron microscopy analyses have been carried out in the material characterization phase. Pulsed thermography and ultrasonic C-scanning were used for the localization of conductive resin embedded within the composite laminates. This study also provides recommendations for enabling internally embedded piezoelectricity (and thus health-monitoring capabilities) in high-performance composite laminates.

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Section: Resultsmentioning

confidence: 92%

“…This is due to the detection of graphene present in the conductive resin forming the conductive layer. 56,57…”

Section: Resultsmentioning

confidence: 99%

Electrospun Piezoelectric Polymer Nanofiber Layers for Enabling in Situ Measurement in High-Performance Composite Laminates

et al. 2018

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“…Also it can be argued that the mean size of nanostructures increases as the density of GNs onto the surface increases, which leads to higher intensity of the d 002 peak. 21,22 As it can be seen in the Raman spectra of CF there are both D and G bands which show that the plane CF itself contains some inherent defects, however it is clear that the ratio of D to G bands has increasingly improved as it is shown in Figure 3B, indicating decrease in the average size of sp 2 domains in CF/GNs compared with plane CF which is due to GNs production onto the surface. Meanwhile, the presence of G band peak in both CF and CF/GNs compromises that the C=C backbone structure is maintained in both of them since it pertains to the C(sp 2 )-C(sp 2 ) bond stretching vibration.…”

Section: Resultsmentioning

confidence: 92%

Biofuel Cell Based on Carbon Fiber Electrodes Functionalized with Graphene Nanosheets

Koushanpour

Guz

Gamella

et al. 2016

ECS J. Solid State Sci. Technol.

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Carbon fiber electrodes were electrochemically modified with graphene nanosheets in situ deposited in the 3D-structure, characterized by field emission scanning electron microscopy (SEM), X-ray diffraction (XRD) and Raman scattering methods. The graphenemodified electrodes were further functionalized with PQQ-dependent glucose dehydrogenase and laccase and used for assembling a biofuel cell operating in the presence of oxygen and glucose "fuel". The paper represents novel approach to the production of graphene-functionalized electrodes and their use in biofuel cells, potentially applicable in implantable bioelectronics devices.

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“…In addition, adhesive joints are also present in secondary and tertiary structures of offshore installations (water ducts, railings, handrails, stairs, vessels, tanks and light fixtures), being another universe for the application of this material, which the same advantages of increased safety, reduced operating time and the possibility of extending the service life are extremely attractive 10 . Studies [11][12][13][14][15][16][17][18] also present the influence of both the surface preparation in carbon fiber reinforced polymer (CFRP) composites and the thickness of the adhesive layer on the shear strength. Each of these studies points to an adherent surface treatment that promoted better shear resistance, among them through the use of peel plies, sanding with abrasive material and plasma treatment.…”

Section: Introductionmentioning

confidence: 99%

Influence of Surface Treatment on The Mechanical and Viscoelastic Properties of Adhesive Joints Applied to The Oil and Gas Industry

et al. 2023

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Structural adhesives emerge as an alternative technique for joining materials used in tertiary structures in the oil and gas industry instead of welding, for example, in order to mitigate risks caused by the use of sparks on offshore platforms. Therefore, the present work aims to evaluate the influence of different surface treatments of the adherent material (carbon fiber/epoxy composite) on the mechanical behavior of the adhesive joints through the lap shear test. Furthermore, the viscoelastic properties of the epoxy-based structural adhesive were analyzed via dynamic-mechanical analysis (DMA). The results indicates that the adhesive exhibits residual curing when cured at room temperature and a post-curing process is required to increase its glass transition temperature (T g ) and its stiffness, Lap Shear tests results shows that the adherent surface treatment that generated the best mechanical response was cleaning with solvent, despite its lower roughness compared to the fuseply treatment, which indicates a strong correlation between roughness and wettability in obtaining resistant adhesive joints.

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Nano-modified adhesive by graphene: the single lap-loint case

Cited by 38 publications

References 8 publications

Electrospun Piezoelectric Polymer Nanofiber Layers for Enabling in Situ Measurement in High-Performance Composite Laminates

Electrospun Piezoelectric Polymer Nanofiber Layers for Enabling in Situ Measurement in High-Performance Composite Laminates

Biofuel Cell Based on Carbon Fiber Electrodes Functionalized with Graphene Nanosheets

Influence of Surface Treatment on The Mechanical and Viscoelastic Properties of Adhesive Joints Applied to The Oil and Gas Industry

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