Mechanical and thermal performances of epoxy resin/graphitic carbon nitride composites

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.

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3.7 MPa, even lower than the value of pure epoxy.…”

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 91%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

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

Baghdadi

Sinno

Bouhadir

et al. 2021

“…The second is carbonaceous materials (graphene 18 and carbon 19 ). The third is ceramic particles (SiO 2, 20 SiC, 21 and BN 22 ). Conductor and semiconductor can significantly improve the thermal conductivity of EP but reduce the electrical resistivity and electrical properties of the material 23 .…”

Section: Introductionmentioning

confidence: 99%

Influences of nanoparticle content on electrical and thermal performances of micro‐nano hybrid composites for packaging materials

Dai

Chen

Meng

et al. 2021

This paper presents electrical and thermal properties of a novel type of micro‐nano hybrid composites to be potential for packaging. The micro‐nano hybrid composites contain 20 wt% of micro‐aluminium nitride (AlN) with 1, 3, and 5 wt% of nano‐AlN, respectively. Electrical measurement and thermal analysis are used to analyze the performances. The results show that the nano‐AlN in the hybrid composites can suppress the space charge accumulation near the cathode and facilitate the conversion of hetero charge into the homo‐charge accumulations near the anode. No apparent electric field distortion can be observed in the M20N3 sample, whereas it exhibits a minimum electrical conductivity and highest thermal conductivity amongst all samples. Furthermore, the nano‐filler addition can enhance the DC breakdown strength and the thermal stability of the hybrid composites. The thermal and electrical conduction mechanism of the micro and nano fillers in the hybrid composites is also elucidated.

Enhanced anti‐aging and anti‐corrosion performance of waterborne epoxy coating layers over the dual effects of g‐C₃N₄ photocatalysis

Chen

Fei

et al. 2022

To overcome the drawbacks of waterborne epoxy (WEP) films, various fillers were employed to eliminate the microcracks and microporous in the coating layers. Here, photocatalysis (g‐C3N4) was incorporated into WEP coating to achieve improved long‐term anti‐aging and anti‐corrosion performance via dual effects, including barrier effects through the formation of dense and uniform composite film as well as the photocatalytic effects. The chemical structure, chemical states, photoabsorption properties, and morphology of g‐C3N4/WEP films were analyzed. Effects of g‐C3N4 content on the mechanical properties, water resistance, anti‐corrosion behaviors, anti‐permeation property, and photocatalytic activity of g‐C3N4/WEP (x‐CN/WEP) composites were investigated by salt spray test, electrochemical impedance spectroscopy, and RhB degradation experiments. 2‐CN/WEP coating with the addition of 2% g‐C3N4 displayed the optimum mechanical property, water resistance, anti‐permeation, anti‐corrosion, and anti‐aging performance. The anti‐corrosion mechanisms of x‐CN/WEP composite coating were also summarized, which consists in the formation of chemical bonds between g‐C3N4 and WEP, uniform distribution of g‐C3N4 in WEP, and the photocatalytic performance of g‐C3N4.