Tailored multifunctional nanocomposites obtained by integration of carbonaceous fillers in an aerospace grade epoxy resin curing at high temperatures

Öztürkmen, Mahide Betül; Demirel, Merve Özkutlu; Ağaç, Özlem; Ece, Remzi Ecmel; Öz, Yahya

doi:10.1016/j.diamond.2023.109840

Cited by 13 publications

(6 citation statements)

References 69 publications

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“…This may be due to the fact that h-BN agglomerates in the epoxy matrix at low GNP concentrations resulting in rigid integrated nanoparticles which in turn restrict polymer chain movements. 36 In addition, DSC results show that the heat of the epoxy curing reaction ΔH tot lying at 512 J = g is reduced in the nanocomposites by up to 8% in accordance with the literature. 55,56 This observation occurs due to the decreased epoxy amount in the nanocomposites in combination with the increased viscosity caused by the presence of nanofillers which hinder the mobility of the epoxy monomers.…”

Section: Thermal Characterization Of Gnp/h-bn/epoxy Nanocompositessupporting

confidence: 86%

“…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: Hybrid Nanocomposite Manufacturingmentioning

confidence: 80%

“…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: Thermal Characterization Of Gnp/h-bn/epoxy Nanocompositessupporting

confidence: 86%

Section: Hybrid Nanocomposite Manufacturingmentioning

confidence: 80%

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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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“…In turn, the CNF or CNT aggregation decreases the nanocomposite's mechanical properties by weakening the polymer-nanofiller interfaces. As a result, Öztürkmen et al [96] proposed three-roll milling to enhance the dispersion and distribution of GNT and CNT into high-temperature curing resins. The three-roll milling integrated the carbonaceous fillers into the epoxy matrix with high homogeneity, enhancing the filler dispersions.…”

Section: Thermal Protection Materialsmentioning

confidence: 99%

A Review of Novel Heat Transfer Materials and Fluids for Aerospace Applications

Nobrega,

Cardoso,

Souza

et al. 2024

Aerospace

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The issue of thermal control for space missions has been critical since the early space missions in the late 1950s. The demands in such environments are heightened, characterized by significant temperature variations and the need to manage substantial densities of heat. The current work offers a comprehensive survey of the innovative materials and thermal fluids employed in the aerospace technological area. In this scope, the materials should exhibit enhanced reliability for facing maintenance and raw materials scarcity. The improved thermophysical properties of the nanofluids increase the efficiency of the systems, allowing the mass/volume reduction in satellites, rovers, and spacecraft. Herein are summarized the main findings from a literature review of more than one hundred works on aerospace thermal management. In this sense, relevant issues in aerospace convection cooling were reported and discussed, using heat pipes and heat exchangers, and with heat transfer ability at high velocity, low pressure, and microgravity. Among the main findings, it could be highlighted the fact that these novel materials and fluids provide enhanced thermal conductivity, stability, and insulation, enhancing the heat transfer capability and preventing the malfunctioning, overheating, and degradation over time of the systems. The resulting indicators will contribute to strategic mapping knowledge and further competence. Also, this work will identify the main scientific and technological gaps and possible challenges for integrating the materials and fluids into existing systems and for maturation and large-scale feasibility for aerospace valorization and technology transfer enhancement.

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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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Tailored multifunctional nanocomposites obtained by integration of carbonaceous fillers in an aerospace grade epoxy resin curing at high temperatures

Cited by 13 publications

References 69 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

A Review of Novel Heat Transfer Materials and Fluids for Aerospace Applications

Examination of the metallization behaviour of an ABS surface

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