Thermal and dielectric properties of nanocomposites prepared from reactive graphene oxide and silicon‐containing cycloaliphatic diepoxide

Liu, Yida; Wang, Zhonggang

doi:10.1002/pc.25417

Cited by 6 publications

(1 citation statement)

References 36 publications

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“…Epoxy resins are polymer materials with excellent overall performance, which are widely used in civil fields, such as coatings [1,2], electrical and electronic materials [3,4], and composite materials [5][6][7]. The demand for advanced composite materials with specific performance is growing as a result of economic and social growth.…”

Section: Introductionmentioning

confidence: 99%

Thermal Stability, Mechanical Properties and Ceramization Mechanism of Epoxy Resin/Kaolin/Quartz Fiber Ceramifiable Composites

Xue

Qin

et al. 2022

Polymers

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The application of epoxy resins in high temperature and thermal protection fields is limited due to their low decomposition temperature and low carbon residual rate. In this paper, epoxy resin (EP)/quartz fiber (QF) ceramifiable composites were prepared using a prepreg-molding process. The thermal stability, phase change and mechanical properties after high-temperature static ablation and ceramization mechanism of EP/QF ceramifiable composites were investigated. The addition of glass frits and kaolinite ceramic filler dramatically increases the thermal stability of the composites, according to thermogravimetric (TG) studies. The composite has a maximum residual weight of 61.08%. The X-ray diffraction (XRD) results show that the mullite ceramic phase is generated, and a strong quartz diffraction peak appears at 1000 °C. The scanning electron microscope (SEM) and element distribution analyses reveal that the ceramic phase generated inside the material, when the temperature reaches 1000 °C, effectively fills the voids in composites. The composites have a bending strength of 175.37 MPa at room temperature and retain a maximum bending strength of 12.89 MPa after 1000 °C treatment.

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Section: Introductionmentioning

confidence: 99%

Thermal Stability, Mechanical Properties and Ceramization Mechanism of Epoxy Resin/Kaolin/Quartz Fiber Ceramifiable Composites

Xue

Qin

et al. 2022

Polymers

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Development of high thermally conductive and electrically insulated epoxy nanocomposites with high mechanical performance

et al. 2021

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Developing polymer-based nanocomposites with high thermal conductivity, mechanical performance, and electrical insulation becomes a huge challenge in both academia and industry. In this article, the synergistic effects of boron nitride (BN) nanosheets and carbon nanotubes (CNTs) on mechanical properties and thermal conductivity of epoxy nanocomposite adhesives were investigated. The results showed that the addition of one-dimensional CNTs and two-dimensional BN nanosheets into the epoxy matrix contributes to the formation of a three-dimensional network and a larger contact surface between the nanofillers and the epoxy matrix. The hybrid filler of BN and CNTs provided significant improvements in thermal conductivity and mechanical properties of epoxy nanocomposite adhesives. At 1.06 vol% of BN-CNTs, epoxy nanocomposite adhesives provide higher Young's modulus, fracture toughness (K 1C ), energy release rate (G 1C ), lap shear strength, and thermal stability compared with epoxy/BN nanocomposite adhesives. The thermal conductivity of epoxy/BN-CNT nanocomposites recorded its maximum values of 0.49 K m À1 k À1 at 3.79 vol% and increased by 335% compared with 133% in case of epoxy/BN at the same fraction of 3.79 vol%.

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Tailoring the graphene oxide chemical structure and morphology as a key to polypropylene nanocomposite performance

et al. 2021

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In this work, we designed and studied two synthetic routes, based on modified Hummers method, to obtain graphene oxide (GO), and investigated their influence on the performance of polypropylene (PP)/GO nanocomposites. The two synthetic routes differed in the application condition of the oxidizing agent, potassium permanganate (KMnO4), which was added either as a powder (GO‐P) or as a water solution (GO‐S). This apparently subtle synthetic change yielded GOs with different degrees of oxidation and particle sizes, where GO‐P presented a higher oxidation degree and smaller particles. The different GOs were then melt‐blended with PP and the correlation between their different chemical/morphological structures and the nanocomposites' thermomechanical/rheological properties were evaluated. The milder oxidation process suffered by GO‐S, and consequent less hydrophilic character, yielded a PP/GO‐S nanocomposite with improved performance as the consequence of a better matrix/filler chemical affinity, mainly in compositions with lower GO‐S contents. The thermal stability was increased by more than 10°C when 0.1 wt% GO‐S was inserted into PP. When compared to the composition with 0.1 wt% GO‐P, the increase was 13°C. Reinforcing effects were also observed in that sample (with 0.1 wt% GO‐S), which exhibited the highest storage modulus and complex viscosity. These results suggest that tailoring the GO's oxidation degree and morphology is a key point to obtain an ideal interfacial interaction between phases.

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Thermal and dielectric properties of nanocomposites prepared from reactive graphene oxide and silicon‐containing cycloaliphatic diepoxide

Cited by 6 publications

References 36 publications

Thermal Stability, Mechanical Properties and Ceramization Mechanism of Epoxy Resin/Kaolin/Quartz Fiber Ceramifiable Composites

Thermal Stability, Mechanical Properties and Ceramization Mechanism of Epoxy Resin/Kaolin/Quartz Fiber Ceramifiable Composites

Development of high thermally conductive and electrically insulated epoxy nanocomposites with high mechanical performance

Tailoring the graphene oxide chemical structure and morphology as a key to polypropylene nanocomposite performance

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