PECVD application to obtain polymer coated graphene nanoplatelets and development of new epoxy nanocomposites

Yanardag, Duygu; Ahmetli, Gülnare; Karaman, Mustafa; Kocaman, Süheyla

doi:10.3144/expresspolymlett.2022.2

Cited by 15 publications

(17 citation statements)

References 56 publications

(84 reference statements)

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“…In particular, it was observed that the D‐band and 2D‐band of GNPs vary in position, intensity and width with respect to the bands on MWCNTs and MWCNT/GNP hybrid (Figure 3B), which means that GNPs have small defects and high quality. [ 57 ]…”

Section: Resultsmentioning

confidence: 99%

Study of seawater effect on the mechanical and thermomechanical properties of hybrid multiwall carbon nanotube/graphene nanoplatelet‐glass fiber/epoxy laminates

2022

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The influence of seawater aging on the flexural and thermomechanical properties of glass fiber/epoxy (GF/E) composites containing the hybrid combination of multiwall carbon nanotubes (MWCNTs) and graphene nanoplatelets (GNPs) was experimentally investigated in this work. The three-point bending and dynamic mechanical analysis were performed to test flexural modulus, flexural strength, strain to failure, storage modulus, and glass transition temperature (T g ) of hybrid MWCNT/GNP-GF/E composites at different mixing ratios (1:0, 7:1, 3:1, and 0:1) which were immersed in seawater at 60 C. The results confirm that seawater aging plays a significant role in reducing the mechanical and thermomechanical properties of hierarchical composite laminates due to degradation and weakening of the fiber/matrix interface as a consequence of plasticization and swelling effects of the polymer matrix. Despite this serious physical degradation, MWCNT/GNP-GF/E hybrid composites with (7:1) showed a better resistance to seawater aging, with slight improvements in flexural strength (2%), strain to failure (14%), and T g (12%) compared to neat GF/E composites, due to positive synergistic effect of the carbon nanostructures in the composite laminates, making them suitable for marine applications.

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Section: Resultsmentioning

confidence: 99%

Study of seawater effect on the mechanical and thermomechanical properties of hybrid multiwall carbon nanotube/graphene nanoplatelet‐glass fiber/epoxy laminates

2022

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“…As reported in the previous study, also at low graphene (GNP) ratio of 0.3 wt% in a salty environment, rectangular and square NaCl crystals penetrated the composite structure, but this situation was not detected for a higher GNP ratio. 16 It has been reported in the literature that the corrosion protection performance of nanocomposite coatings depends on the clay loading up to the saturation level. These optimal ratio epoxy-clay nanocomposites have excellent mechanical properties, thermal stability, and high corrosion protection, making them attractive candidates for various coating applications.…”

Section: Corrosion Resistance Propertymentioning

confidence: 99%

“…13 Nano-and micro filler reinforced epoxy composites are also in high demand in marine coatings due to their high anticorrosive properties that restrict the penetration of ions in aggressive environments. 14,15 In addition to nanoparticles such as graphene and carbon nanotubes in epoxy composites, 16,17 research on the incorporation of nanoclays (NC) into epoxy resins has been increasing in the last two decades due to the unique properties exhibited by polymer/clay (NC) nanocomposites. [13][14][15]18 Studies have revealed that the inclusion of montmorillonite (MMT)-type NC improves the dynamic mechanical properties such as storage modulus and glass transition temperature (T g ), surface hydrophobicity, and anticorrosive property of the formulated nanocomposites.…”

Section: Introductionmentioning

confidence: 99%

Polystyrene waste‐modified epoxy/nanoclay and hybrid composite coatings

Özmeral

Kocaman

Soydal

et al. 2022

J of Applied Polymer Sci

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In this study, phenolic novolac-type epoxy (EPN) resin was modified with 4 wt % thermoplastic polystyrene (PS) waste and was used as the polymer matrix for the first time. Two types of composites were prepared: (i) nanocomposites with 1-3 wt% nanoclay (NC) and (ii) hybrid composites. Pristine (NC) and tetramethylammonium chloride modified nanoclays (MNC) were used at a 2 wt% ratio in hybrid composites with 25-35 wt% red mud waste (RMW). The corrosion protection properties of the coatings were determined by immersion test in 5 wt% NaOH, HCl, and NaCl solutions. The water sorption of hybrid composites varied between 1%-3.6% and 1%-5.3%, while it was between 0.82% and 1.02% in EPN-PS/NC nanocomposites. The weight gain percentage values of hybrid composites in corrosive media for the base and salt solutions were determined much lower (0.59%-0.75% and 0.46%-0.59%, respectively) than water sorption. Surface morphologies of hybrid composites were examined by scanning electron microscopy before and after corrosion tests. MNC-30 wt% RMW hybrid composite was found more suitable due to high corrosion resistance in basic and salty environments, storage modulus, loss modulus, and glass transition temperature (T g ) values (90.6 C) as compared with NC-30 wt% RMW hybrid composite.

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“…The nanoscale particles have an exceptionally high aspect ratio (surface‐to‐volume ratio), which directly strengthens the mechanical, electrical, optical, and thermal behavior of composites as well as their barrier properties to temperature and corrosive factors 1 . Single and multi‐walled carbon nanotubes (CNT), graphene (G), graphene oxide (GO), nanoclays, and so forth make up the list of widely used nanofillers in recent years 2–5 . Nanoclay, a two‐dimensional (2D) nanofiller, provides a protective barrier formation even at low clay loading when a high degree of exfoliation with good dispersion is achieved, leading to improved polymer physical performances.…”

Section: Introductionmentioning

confidence: 99%

“…1 Single and multi-walled carbon nanotubes (CNT), graphene (G), graphene oxide (GO), nanoclays, and so forth make up the list of widely used nanofillers in recent years. [2][3][4][5] Nanoclay, a two-dimensional (2D) nanofiller, provides a protective barrier formation even at low clay loading when a high degree of exfoliation with good dispersion is achieved, leading to improved polymer physical performances. Clay's high rich intercalation chemistry gives it easy chemical modification and compatibility with polymers.…”

Section: Introductionmentioning

confidence: 99%

Cotton waste and nanoclay‐based phenolic novolac epoxy composites and evaluation of their properties

Soydal

2022

J of Applied Polymer Sci

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In this study, two types of biobased epoxy composites were prepared by using only alkali-treated cotton waste (CtW), or with the nanoclay (NC) in the form of hybrid reinforcement. Phenol novolac-type epoxy resin (EPN) was used as a matrix. Untreated (CtW) and alkali-treated (NaOH-CtW) particles were characterized by scanning electron microscopy (SEM)/energy-dispersive X-ray spectroscopy (EDX). The average size for NC was determined as 3838 nm.Composites were prepared at 10-50 wt% NaOH-CtW and 20 wt% NaOH-CtW/ (1-2-3-4-5) wt% NC ratios. The morphology of the composites was investigated using SEM. The composites' properties were determined by applying thermogravimetric analysis (TGA), and various tests (tensile, hardness, water sorption, and surface contact angle measurement). The tensile strength of pure EPN was 96.6 MPa, while it changed in the range of 74-98 and 81-106 MPa for NaOH-CtW and hybrid composites, respectively. All hybrid composites exhibited higher Young's modulus values (7.7-8.9 GPa). Thermal values of hybrid composites were found higher and their char percentages varied in the range of 28.9-30.3%. NaOH-CtW increased the water sorption of the epoxy matrix from 0.59% up to 6% by 50 wt%. In contrast, a decrease in water sorption of NC composites was observed.

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PECVD application to obtain polymer coated graphene nanoplatelets and development of new epoxy nanocomposites

Cited by 15 publications

References 56 publications

Study of seawater effect on the mechanical and thermomechanical properties of hybrid multiwall carbon nanotube/graphene nanoplatelet‐glass fiber/epoxy laminates

Study of seawater effect on the mechanical and thermomechanical properties of hybrid multiwall carbon nanotube/graphene nanoplatelet‐glass fiber/epoxy laminates

Polystyrene waste‐modified epoxy/nanoclay and hybrid composite coatings

Cotton waste and nanoclay‐based phenolic novolac epoxy composites and evaluation of their properties

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