Investigation of Mechanical and Physical Properties of Graphene With Epoxy Matrix

Öztürkmen, Mahide Betül; Demirel, Merve Özkutlu; Öz, Yahya

doi:10.18038/estubtda.984915

Cited by 9 publications

(6 citation statements)

References 8 publications

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“…According to the experience gained in previous studies, 36,37 it has been observed that working at low concentrations by weight both provides the desired output and is successful in creating a homogeneous mixture in thermoset resins if the relevant percolation threshold is expected to be low which is provided for the in this study used epoxy system 38,39 . Therefore, in this study, 0, 0.1, 0.25, 0.5 and 1 wt% of fillers were mixed into the epoxy resin.…”

Section: Methodsmentioning

confidence: 99%

“…Experimental preliminary studies have been carried out to determine the suitability of this device, which is frequently used in industrial applications for experimental studies. As a result, mixing speed and cycle were optimized 36,37 . According to the process, nanomaterials were added to the resin sequentially according to data from DOE and mixed for 5 cycles.…”

Section: Methodsmentioning

confidence: 99%

“…As a result, mixing speed and cycle were optimized. 36,37 According to the process, nanomaterials were added to the resin sequentially according to data from DOE and mixed for 5 cycles. The mixing speed was 50 rpm while the gap between the rollers was 50 μm.…”

Section: Hybrid Nanocomposite Manufacturingmentioning

confidence: 99%

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Physical and mechanical properties of graphene and h‐Boron nitride reinforced hybrid aerospace grade epoxy nanocomposites

Öztürkmen,

Öz,

Dilsiz

2023

J of Applied Polymer Sci

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Varying graphene nanoplatelet (GNP) and hexagonal boron nitride (h‐BN) based fillers were integrated to an aerospace grade epoxy resin typically used as matrix to obtain or repair structural parts of aerospace platforms. The three‐roll milling approach was used for this purpose. Five cycles were performed for the mixing while the gap between rollers was 50 μm. Microstructure and thermal properties of the nanocomposites were studied. Moreover, mechanical and transport (electrical as well as thermal) performances were investigated. Results show that certain fillers yield multifunctional properties, that is, enhanced flexural strength by up to 69% in combination with high electrical conductivities with orders of magnitude of approximately and improved thermal conductivities up to 9.3%. For instance, the hybrid nanocomposite sample produced with 0.5 wt% GNP and 0.5 wt% h‐BN added to the epoxy matrix exhibits an electrical conductivity which increased fold, a flexural strength increased by 69% and thermal conductivity increased by 7% in comparison the neat epoxy. Hence, in this study it was demonstrated that these properties can be engineered and tuned effectively for aerospace applications like lightweight avionic chassis which have specific requirements like thermal and electric conductivity which naturally leads to the possible usage of GNP and h‐BN in an epoxy. Correspondingly, presented results are of relevance for novel thermal interface materials with tailored electrical properties.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

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Physical and mechanical properties of graphene and h‐Boron nitride reinforced hybrid aerospace grade epoxy nanocomposites

Öztürkmen,

Öz,

Dilsiz

2023

J of Applied Polymer Sci

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“…At higher concentrations nanoparticles may show agglomeration which forms stress concentrated regions that might cause earlier deformation of the matrix under loads. 6,27 However, an epoxy AgNW composite with 5 wt% AgNWs was produced to investigate effects of the AgNW amount on electromagnetic shielding properties of the composite. Moreover, a specific reinforcement ratio was chosen for preparing surface modified AgNW (m-AgNW) epoxy composites to improve the homogeneity of the composites while studying its effects on varying properties of the structure.…”

Section: Introductionmentioning

confidence: 99%

Effects of silver nanowires and their surface modification on electromagnetic interference, transport and mechanical properties of an aerospace grade epoxy

Özkutlu Demirel,

Öztürkmen,

Savaş

et al. 2024

Journal of Composite Materials

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The aerospace industry has progressively grown its use of composites. Electrically conductive nanocomposites are among important modern materials for this sector. We report on a bulk composite containing silver nanowires (AgNW) and an aerospace grade epoxy for use in carbon fiber reinforced polymers (CFRPs). AgNWs’ surfaces were also modified to enhance their ability to be dispersed in epoxy. Composites were obtained by use of three-roll milling which is of major interest for industrial applications, especially for the aerospace sector, since the process is scalable and works for aerospace grade resins with high curing temperatures. Our main objective is to improve the electromagnetic interference (EMI) shielding performance of CFRPs via improving the properties of the resin material. The addition of AgNWs did not considerably alter the flexural strength of the epoxy, however the composite with surface-modified AgNWs has a 46 % higher flexural strength. Adding AgNWs over a low threshold concentration of 0.05 wt% significantly enhanced the electrical conductivity. Conductivities above the percolation threshold lie around 102 S/m. At a concentration of 5 wt% AgNW, the EMI shielding efficiency (SE) of epoxy increased from 3.49 to 12.31 dB. Moreover, the thermal stability of the epoxy was unaffected by AgNWs. As a result, it was discovered that (surface modified) AgNWs improved the (multifunctional) capabilities of the aerospace grade epoxy resin which might be used in CFRPs to further enhance properties of composites parts, demonstrating suitability of AgNWs’ as a reinforcement material in aerospace applications.

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“…Composite manufacturing is significant for the aerospace industry because of preferred characteristics like enhanced strength/weight ratio, high durability limit under cyclic stresses and minimized corrosion issues of composites [1][2][3][4][5][6][7][8][9][10]. Composite parts are manufactured by several methods while the hand lay-up process is still used commonly.…”

Section: Introductionmentioning

confidence: 99%

Examination of the metallization behaviour of an ABS surface

Ünlü,

Öz,

Erdoğan

et al. 2023

Surface Engineering

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The main scope of this work is the metallization of high density Acryonitrile Butadiene Styrene (ABS) surfaces for aerospace applications. Originality and main focused area of the study is to grasp the mechanism of physical properties of the surface and the effect of wet chemical processes on the surface of the ABS substrate. After surface sensitization and metallization with nano-sized ions, the polyurethane surface is metallized and nickel (Ni) coated with electroless and elecrolytic Ni plating processes. The ultimate goal of these advances is the production of composite lay-up tools for the production of primary and secondary composite aircraft parts from nanoscale to macro level. Composite lay-up tool requirements of the aerospace industry include a minimum thickness of 5 mm, acceptability of airtightness testing and reduced surface roughness. Results show that increasing current density adversely affects the surface morphology and metallization processes enhance the surface conductivity of the foam.

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Investigation of Mechanical and Physical Properties of Graphene With Epoxy Matrix

Cited by 9 publications

References 8 publications

Physical and mechanical properties of graphene and h‐Boron nitride reinforced hybrid aerospace grade epoxy nanocomposites

Physical and mechanical properties of graphene and h‐Boron nitride reinforced hybrid aerospace grade epoxy nanocomposites

Effects of silver nanowires and their surface modification on electromagnetic interference, transport and mechanical properties of an aerospace grade epoxy

Examination of the metallization behaviour of an ABS surface

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