Sustainable sandwich composite structures made from aluminium sheets and disposed bottle caps

Oliveira, Pablo Resende; Bonaccorsi, Aline Maria Silva; Panzera, Túlio Hallak; Christofóro, André Luis; Scarpa, Fabrizio

doi:10.1016/j.tws.2017.08.013

Cited by 30 publications

(65 citation statements)

References 13 publications

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“…Caps in alternated directions led to reduced strength compared to the configuration of single directed caps when associated with the polyester adhesive (Figures 3(a) to 3(c), plot ii). An opposite behaviour was found in a previous study [15], which used polypropylene bottle caps. In this case, alternated caps presented a better distribution of the surface contact area between the caps and the skins, enhancing the adhesion and the panel strength.…”

Section: Flexural Stress Core Shear Stress and Facing Stresscontrasting

confidence: 75%

“…The results were later confirmed by Lin, Cheng and Huang [14]. In addition, a sustainable panel based on bottle caps and aluminium skins was proposed by Oliveira et al [15] in order to reduce the impact of disposing of PP wastes in the environment. These panels achieved acceptable mechanical strength and stiffness for secondary structural applications, revealing a new recycling route for plastic bottle caps.…”

Section: Introductionmentioning

confidence: 78%

“…The use of aluminium skins with smooth surface led to enhanced mechanical performance compared to the rough surface. In contrast, Oliveira et al [15] revealed a reduction in bonding when smooth aluminium surface was used without any treatment. In this case, however, a surface treatment based on sandpapering, full cleaning with acetone, and WashPrimer pulverisation was more effective when applied to smooth aluminium skins, reaching moderate roughness values.…”

Section: Flexural Stress Core Shear Stress and Facing Stressmentioning

confidence: 90%

“…The test was conducted in a Mitutoyo MVK -G1 machine, which determined the Vickers hardness (HV) of the material. Elastic modulus, tensile strength and shear strength were then obtained by Equations (1) to (3), as summarised by Oliveira et al [15].…”

Section: Surface Roughnessmentioning

confidence: 99%

See 3 more Smart Citations

A Novel Recycling Route for Polyethylene Bottle Caps as Circular Honeycomb Core

Jesus¹,

Oliveira²,

Filho³

et al. 2018

Proceedings of the 4th Brazilian Conference on Composite Materials

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The disposal of plastic wastes in the environment has been an urgent issue due to pollution of the soil and the sea. The incorporation of polymeric residues into innovative and sustainable structural composites can be considered a promising recycling route. This work investigates the use of disposed polyethylene (PE) caps from drinking water bottles as a sustainable honeycomb core with circular cell geometry. A full factorial design was conducted to identify the effect of bottle caps orientation (single and alternated directions), polymeric adhesive (epoxy and polymer), and aluminium roughness (smooth and rough surface) on the mechanical properties of sandwich panels. The use of epoxy polymer contributes significantly to enhance panel strength and stiffness.Smooth aluminium skins lead to increased panel strength, suggesting a limited effect of roughness increase to enhance aluminium and skin bonding. Finally, single directed caps in the core achieve better mechanical performance than alternated caps. The results evidence the feasibility of alternative uses for bottle caps into structural and sustainable applications. 1.

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Section: Flexural Stress Core Shear Stress and Facing Stresscontrasting

confidence: 75%

Section: Introductionmentioning

confidence: 78%

Section: Flexural Stress Core Shear Stress and Facing Stressmentioning

confidence: 90%

Section: Surface Roughnessmentioning

confidence: 99%

See 2 more Smart Citations

A Novel Recycling Route for Polyethylene Bottle Caps as Circular Honeycomb Core

Jesus¹,

Oliveira²,

Filho³

et al. 2018

Proceedings of the 4th Brazilian Conference on Composite Materials

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“…In all FML applications, face-core bond strength is a fundamental property [11]. The mechanical efficiency of FMLs is indeed determined by the ability of this interfacial region to transfer mechanical loads through the constituents materials [4][5] [6] [12][10] [3]. Thus, pre-treatments of aluminum faces are important to improve the inherently weak interlaminar bond strength between the aluminum alloy and the polymeric core [11][12] [6].…”

Section: Introductionmentioning

confidence: 99%

EVALUATION OF MECHANICAL PROPERTIES OF LOW COST FMLs FABRICATED WITH COIR FIBRE-REINFORCED COMPOSITES

Santos¹,

Vieira²,

Freire³

et al. 2018

Proceedings of the 4th Brazilian Conference on Composite Materials

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Fibre Metal Laminates (FMLs) are composite structures that comprise alternating metal layers and fibre-reinforced polymer composites (FRCs) combining their distinct physical-mechanical properties. Traditional FMLs are based on synthetic (carbon, glass and aramid) fibres. However, alternative FMLs based on natural fibre-reinforced composites have been developed to take advantage of available natural resources. A new ecofriendly FML sandwich based on random coir fibre-reinforced epoxy and polyester resin was developed in this research. Mechanical tests revealed that the tensile properties were fully dominated by the aluminium sheets, which were treated with alkali for degreasing and wash primer in order to enhance interfacial bonding. Such treatment efficiently reduced delamination and increased the flexural modulus (~67%). A similar increase in flexural (~22.94%) and impact strength (~99.16%) as well as in skin stress (~20.89%) of the new FMLs proposed was observed owing to the flexural and impact strength of composite cores and better core-layer stress transfer upon the aluminium treatment.

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Recycled polyethylene bottle caps as sandwich panel circular honeycomb: Experimental and numerical approach

et al. 2020

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This work describes aluminium skin sandwich panels made of recycled polyethylene (PE) bottle caps as a sustainable honeycomb core. A full factorial design is carried out to identify the effects of the orientation of the caps (single and alternated caps), skin roughness (smooth and rough substrate) and the type of adhesive (epoxy or polyester polymer) on the mechanical properties of the panels. Numerical analysis is performed to better assess the failure mechanisms involved. Sandwich panels made with epoxy adhesive, smooth aluminium skin and single oriented caps obtain greater mechanical properties at failure compared to the alternative levels of the factorial design. Increased results are observed for core shear stress (0.38 MPa), facing stress (56.75 MPa), core shear modulus (16.70 MPa), and flexural modulus (1437.47 MPa). This performance reveals an alternative recycling route for used PE bottle caps in structural and sustainable applications.

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Sustainable sandwich composite structures made from aluminium sheets and disposed bottle caps

Cited by 30 publications

References 13 publications

A Novel Recycling Route for Polyethylene Bottle Caps as Circular Honeycomb Core

A Novel Recycling Route for Polyethylene Bottle Caps as Circular Honeycomb Core

EVALUATION OF MECHANICAL PROPERTIES OF LOW COST FMLs FABRICATED WITH COIR FIBRE-REINFORCED COMPOSITES

Recycled polyethylene bottle caps as sandwich panel circular honeycomb: Experimental and numerical approach

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