Thermal and mechanical properties of epoxy resin reinforced with modified iron oxide nanoparticles

Self Cite

Numerous ways to reinforce epoxy resin and improve its thermomechanical properties have been attempted using organic and inorganic nanoparticles. In this paper, graphitic carbon nitride (g‐C3N4) nanoparticles were synthesized and used to improve the mechanical properties and thermal stability of epoxy composites. The g‐C3N4 was synthesized from cheap melamine powder using a simple one‐step thermal treatment, then was used to reinforce the resin at different weight percentages (wt%). X‐ray diffraction, scanning electron microscopy (SEM), and Fourier infrared spectroscopy were used to characterize the g‐C3N4 and ensure its successful synthesis by studying the changes in its crystal structure, morphology, and chemical structure. The filler was dispersed in the resin using a combination of ultrasonication and high shear mixing. The results showed that the mechanical properties were optimum when 0.5 wt% g‐C3N4 was used. The tensile strength and fracture toughness of the resulting epoxy composite improved by 21.8% and 77.3%, respectively. SEM was used to investigate the morphologies of cracks formed in epoxy composite specimens after the tensile testing. The SEM micrographs of the fracture surface showed a transition from a brittle to a rough morphology, signifying the enhancement in the composites' toughness. Thermogravimetric analysis showed a good improvement in degradation temperature of up to 8.86% while dynamic mechanical analysis showed that the incorporation of g‐C3N4 did not affect the material's glass transition temperature.

“…The pure epoxy resin had an average degradation temperature (Td) of 341.53

\pm

0.69°C with a residue content at 750°C of about 2.7

\pm

0.15%. This value has been observed in literature as well 5,7,45 . Upon the incorporation of 0.125 wt% g‐C 3 N 4 , the value of Td increased by 8.86% to reach a maximum of 371.79

\pm

0.19%.…”

Section: Resultssupporting

confidence: 83%

Section: Introductionmentioning

confidence: 99%

The mechanical and thermal properties of graphitic carbon nitride (g‐C₃N₄)‐based epoxy composites

Baghdadi

Sinno

Bouhadir

et al. 2021

Self Cite

“…In recent years, the use of ceramic powders to enhance the strength of polymers has been of concern to many researchers because the results are composites with outstanding properties. There are many factors influencing the improvement, including the concentration of filler, filler size, [1][2][3][4] dispersion of filler in the matrix, 5,6 and interfacial interaction between the filler and matrix. 7,8 These effects are important for a wide range of scientific and industrial processes.…”

Section: Introductionmentioning

confidence: 99%

Filler‐size‐dependent dynamic mechanical properties of polyethylene glycol/zircon composites

Fauziyah

Nurmalasari

Hilmi

et al. 2021

The thermomechanical properties of polyethylene glycol (PEG) composites filled with various zircon sizes were studied. The zircon powders were derived from natural (well-known as puya) sand collected from Kereng Pangi, Central Kalimantan, Indonesia. The effects of the zircon size and content were examined to understand the thermomechanical properties of the composites using dynamic mechanical analysis in shear mode. Pure zircon powders with micron to nanometer sizes were prepared. The microzircon powders were prepared by heating zircon at 500, 1000, and 1200 C. Moreover, the nanozircon powders were prepared by a wet milling method with milling times of 5, 10, and 15 hours. Furthermore, the composites were prepared by a wet mixing method. According to elemental analysis of scanning electron microscopy/energy dispersive X-Ray spectroscopy (SEM/EDX) data, it was found that the various zircon sizes caused different distribution effects, that is, in general, the smaller the size was, the better the distribution. Filler size variation also affected the thermomechanical properties of the composites. The addition of microzircon heated at 1200 C had the lowest storage moduli (G'), that is, 154.90 MPa and 155.55 MPa for 5 wt.% and 10 wt.%, respectively. Moreover, the maximum value of G' was obtained for the composite with the addition of nanozircon milled for 10 h (Z10h), that is, 679.27 MPa and 706.37 MPa for 5 and 10 wt.%, respectively. The addition of nanozircon slightly reduced roomtemperature G', presumably due to the agglomerated filler, as confirmed by the SEM/EDX data. Moreover, a decrease in zircon size caused an increase in the melting temperature (T m ) of the matrix. In contrast, 15 h of milling had a minor effect on T m and G', whereas the loss modulus (G") decreased with the addition of nanozircon. The effects of filler size on the thermomechanical properties of PEG/zircon composites are discussed in detail. K E Y W O R D Snano-and micron-sized filler, PEG, thermomechanical properties, zircon

“…There are many methods to enhance the thermal conductivity of CF/EP composites, such as adding thermal conductive micro/nano fillers to polymer, 9 modifying fiber and interface 10 and constructing a 3D network thermal channel 11 . Adding thermal conductive fillers is a simple and efficient way to enhance the thermal conductivity of composite materials 12,13 . Hexagonal boron nitride (h‐BN) has been widely used as the thermal conductive filler due to its high thermal conductivity, low density, good stability and cost‐efficiency 14–16 .…”

Section: Introductionmentioning

confidence: 99%

Synergetic improvement of the thermal conductivity and interlaminar fracture toughness of carbon fiber/epoxy composites by interleaving BN@ZnO particles

Zhang

Dong

et al. 2023

Synergetic improvement of the thermal conductivity and interlaminar fracture toughness of carbon fiber/epoxy resin composites (CF/EP) is a challenging research job. In this work, hexagonal boron nitride coated ZnO (BN@ZnO) particles were firstly prepared by sol-gel method and BN@ZnO composite laminates were manufactured by mold pressing process. X-ray diffraction,x-ray electron spectroscopy and scanning electron microscopy were used to analyze the structure, chemical components and morphology of the BN@ZnO and composite laminates. The effects of BN@ZnO on the impact strength, model II interlaminar fracture toughness (G IIC ) and thermal conductivity of composite laminates are investigated. The results show that the interlaminar fracture toughness and thermal conductivity of composite laminates are synergistically enhanced owing to the introduction of hybrid fillers with different dimensions and morphology. The thermal conductivity of the 10 wt% BN@ZnO coated composite laminates is increased by 78% and 90% at 25 and 100 C, respectively. The mechanical properties of composite laminates are enhanced. The model II interlaminar fracture toughness of 2 wt% BN@ZnO composite laminates is 15.4% higher than pure laminate. This work is of significance to realize the structural and functional integration of composite materials.