Layer-by-Layer technique employed to construct multitask interfaces in polymer composites

Vitorino, Luísa Sá; Oréfice, Rodrigo Lambert

doi:10.1590/0104-1428.15616

Cited by 6 publications

(5 citation statements)

References 26 publications

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“…Additionally, surface roughness and defects are noticeable, likely caused by the exfoliation process facilitated by this synthesis setup [12]. SEM images (Figure 3) reveal the smooth and shiny appearance of the fiberglass, similar to what has been reported by other authors in the literature [15,16]. However, after subjecting the fiberglass to the graphene deposition process using non-thermal plasma, referred to in the text as a graphene nanoflake/fiberglass (GN/Fiberglass), clear encrustations of carbonaceous material can be observed on the previously smooth surface.…”

Section: Resultssupporting

confidence: 83%

Graphene Deposited on Glass Fiber Using a Non-Thermal Plasma System

Gomes

Bonifácio

Silva

et al. 2023

Eng

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This study reports a bottom-up approach for the conversion of cyclohexane into graphene nanoflakes, which were then deposited onto fiberglass using a non-thermal generator. The composite was characterized using transmission electron microscopy, which revealed the formation of stacked few-layer graphene with a partially disordered structure and a d-spacing of 0.358 nm between the layers. X-ray diffraction confirmed the observations from the TEM images. SEM images showed the agglomeration of carbonaceous material onto the fiberglass, which experienced some delamination due to the synthesis method. Raman spectroscopy indicated that the obtained graphene exhibited a predominance of defects in its structure. Additionally, atomic force microscopy (AFM) analyses revealed the formation of graphene layers with varying levels of porosity.

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Section: Resultssupporting

confidence: 83%

Graphene Deposited on Glass Fiber Using a Non-Thermal Plasma System

Gomes

Bonifácio

Silva

et al. 2023

Eng

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“…The overall experimental procedures used for modifying the surface of the GFs through the LBL technique and producing the composites are described in ref. [16]. Briefly, 0.3 mg/ml 1 aqueous suspension of MWCNT-COOH was prepared containing 2 wt% PSS.…”

Section: Preparation Of the Bidirectional Compositesmentioning

confidence: 99%

“…[20][21][22] However, it is worth noting that the improved mechanical properties is in agreement with the results obtained by Vitorino and Oréfice, in which the flexural strength of GFRP-multilayered composites obtained for conventional sized specimens was 16.3% greater than the flexural modulus of the GFRP-untreated composites. [16] To reveal the effect of the modified interface on the microscopic damage mechanisms, which may arise and develop upon loading, the PCT results of one sample of each group of GFRP composites were chosen and evaluated. The tensile curves of the selected samples are indicated by number (1) in the stress-strain curves (Figure 1).…”

Section: In Situ Tensile Tests Of the Gfrp Compositesmentioning

confidence: 99%

“…[10,12] Recent studies have shown the capability of developing functional materials through the incorporation of thin films on reinforcing agents' surface by using the layer-by-layer (LBL) deposition method. [13][14][15][16] In this work, polypropylene composites with hybrid interface were produced by alternatively depositing two polymers on the glass fiber (GF) surface, poly(diallyldimethylammonium chloride) (PDDA) and poly (sodium 4-styrenesulfonate) (PSS) containing oxidized multiwalled carbon nanotubes (MWCNT-COOH), via the LBL method. [16,17] For obtaining a clear description of the influence of the designed interface on the mechanisms of energy relief during crack propagation, in situ tensile tests were monitored by phase-contrast tomography (PCT) using synchrotron radiation.…”

Section: Introductionmentioning

confidence: 99%

“…[13][14][15][16] In this work, polypropylene composites with hybrid interface were produced by alternatively depositing two polymers on the glass fiber (GF) surface, poly(diallyldimethylammonium chloride) (PDDA) and poly (sodium 4-styrenesulfonate) (PSS) containing oxidized multiwalled carbon nanotubes (MWCNT-COOH), via the LBL method. [16,17] For obtaining a clear description of the influence of the designed interface on the mechanisms of energy relief during crack propagation, in situ tensile tests were monitored by phase-contrast tomography (PCT) using synchrotron radiation. Highly accurate three-dimensional (3D) information on the microstructure, damage evolution, and their correlations could be obtained.…”

Section: Introductionmentioning

confidence: 99%

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From brittle‐to‐ductile fracture of polymer composites: The incorporation of energy dissipation mechanisms by carbon nanotubes‐based multilayered interface

Fioravante

Oliveira

Siqueira

et al. 2020

J of Applied Polymer Sci

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Interfaces can have a great influence on the behavior and properties of polymer composites. In this work, the versatile and low‐cost layer‐by‐layer technique was used for depositing layers of poly(diallyldimethylammonium chloride) (PDDA) and poly(sodium 4‐styrenesulfonate) (PSS) containing oxidized multiwalled carbon nanotubes (MWCNT‐COOH) on the surface of woven glass fibers (GFs); and polypropylene composites containing the modified GFs were prepared by compression molding. The effect of this novel hybrid multilayered interface on the mechanical properties and fracture behavior of the GF reinforced polymer (GFRP) composites was systematically investigated. For that, in situ tensile tests of the composites were monitored by using the high‐resolution phase‐contrast tomography. We found that the GFRP composites with multilayered interface (GFRP multilayered) exhibited exceptional increase in ductility and fracture toughness (about 25 and 130%, respectively), when compared to the composites without interfacial modification (GFRP untreated). Whereas the failure characteristics of the GFRP‐untreated composites were typical of fragile systems (mainly, delamination), the GFRP‐multilayered exhibited additional toughening mechanisms such as crazing and fibrillation as result of the enhanced interfacial adhesion. Our results clearly indicate that the multilayered interface of PDDA/PSS/MWCNT‐COOH led to a more efficient load transfer from the matrix to the GFs, culminating with the brittle‐to‐ductile transition in the failure mode.

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