In-situ polymerization of graphene/SiO2 hybrids modified phenolic resin for improved thermal stability at an ultralow filler loading

Gu, Nianliang; Zhang, Haiyan; Ge, Heyi; Wang, Feifei; Liu, Bomin

doi:10.1007/s00289-020-03409-8

Cited by 9 publications

(3 citation statements)

References 27 publications

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“…These results can be explained by the higher temperature required for the 1% loss of weight (749.9 °C) and the larger residual mass of graphene at 800 °C (98.3%) compared with pristine PF (Figure g). Moreover, graphene sheets dispersed within the PF matrix acted as a physical barrier that slowed down the diffusion of pyrolysis products, thus increasing the thermal stability of the PF/Si-graphene composites. − In addition, the char formation of the composites at 800 °C significantly increased with greater Si-graphene content due to the high residual mass of graphene.…”

Section: Results and Discussionmentioning

confidence: 99%

Enhanced Electrical Properties and Impact Strength of Phenolic Formaldehyde Resin Using Silanized Graphene and Ionic Liquid

Li,

Lee,

Wang

et al. 2023

ACS Omega

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In this study, to improve the electrical properties and impact strength of phenolic formaldehyde (PF) resin, PF-based composites were prepared by mixing graphene and the ionic liquid 3-decyl-bis(1-vinyl-1H-imidazole-3-ium-bromide) (C10[VImBr]2) via hot blending and compression–curing processes. The graphene surface was modified using a silane coupling agent. The synergistic effect of graphene and C10[VImBr]2 on the electrical properties, electromagnetic shielding efficiency, thermal stability, impact strength, and morphology of PF/graphene and PF/graphene/C10[VImBr]2 composites was then investigated. It was found that the electrical conductivity of the composites significantly increased from 2.3 × 10–10 to 4.14 × 10–3 S/m with an increase in the graphene content from 0 to 15 wt %, increasing further to 0.145 S/m with the addition of 5 wt % C10[VImBr]2. The electromagnetic shielding efficiency of the composite increased from 4.70 to 28.64 dB with the addition of 15 wt % graphene, while the impact strength of the composites rose significantly from 0.59 to 1.13 kJ/m2 with an increase in the graphene content from 0 to 15 wt %, reaching 1.53 kJ/m2 with the addition of 5 wt % C10[VImBr]2. Scanning electron microscopy images of the PF/GNP/C10[VImBr]2 composites revealed a rough morphology with numerous microcracks.

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Section: Results and Discussionmentioning

confidence: 99%

Enhanced Electrical Properties and Impact Strength of Phenolic Formaldehyde Resin Using Silanized Graphene and Ionic Liquid

Li,

Lee,

Wang

et al. 2023

ACS Omega

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“…Fig. 10 (e) and 15 (f) demonstrates the sensing measurement of bee pollen and cow urine using SiO2/rGO electrode in the potential range between -0.70 to -0.30V displaying an increase in the current (+ 0.0471 A/cm 2 at 7 mM) for bee pollen and for cow urine sensor shows an increased current in the potential range between -0.70 to -0.30V about (+0.0500 A/cm 2 at 7 mM) [24,50,51]. The above obtained results show that the rGO/SiO2 electrode exhibit good sensing property towards bee pollen and cow urine sensor material in the same potential scale window and showing high current response.…”

Section: Voltammetry Sensormentioning

confidence: 95%

“…2 (b), the FT-IR spectra of silica extracted from RRH reveal four prominent peaks. The broad peak, centered at 3400 cm -1 , is attributed to the O-H stretching of the hydroxyl group [51]. The peak observed at 1100 cm -1 corresponds to the asymmetric stretching vibration of the Si-O-Si group [52].…”

Section: Fourier Transform Infrared Spectroscopy (Ft-ir)mentioning

confidence: 99%

Development of SiO2/rGO from Rice Husk for Photocatalysis, Antioxidant, Electrochemical and Green Sensor Detection Studies

Swetha,

Venkata Lakshmi,

Mylarappa

et al. 2024

Silicon

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This study reports the extraction, characterization and development of reduced graphene oxide (rGO) doped silicon dioxide (SiO2) nanocomposite by simple reflux method. The nanocomposite was confirmed by using X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM) and UV-Visible spectroscopy techniques. The photocatalysis of malachite green (MG) was carried out for rGO, SiO2 and SiO2/rGO nanocomposite shows higher MG degradation about 97% compared to rGO, SiO2 and follows 1 st order kinetics. The antioxidant action of SiO2/rGO nanocomposite was assessed using DPPH shows a more antioxidant activity (98 %) and lower IC50 about 488.35 mg/mL. From electrochemical, the specific capacitance (Csp) value of SiO2/rGO (114 F/g) was exhibits higher compared to rGO (75 F/g) and SiO2 (96 F/g) respectively. The CV and sensor detection of bee pollen and cow urine samples were performed using nickel mesh electrode in 1M KCl in the potential range -1 to 1 V. The SiO2/rGO was employed to analyze bee pollen and cow urine concentrations and the detection limits were found to be 0.260 mM and 0.413 mM respectively. The prepared electrode plays an important role for improving sensor detection of bee pollen and cow urine samples.

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The effect of nanocarbon inclusion on mechanical, tribological, and thermal properties of phenolic resin‐based composites: An overview

Adem,

Panjiar,

Daniel

2024

Engineering Reports

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Nanocarbons including carbon nanotubes, graphene oxide, reduced graphene oxide and particularly graphene have unique properties such as high mechanical strength, thermally stable, highly conducting, high friction stability and lower specific wear rates, which can potentially provide synergically improved performance of advanced engineering materials and technologies for various fields of applications such as automotive, aerospace, and other industrial components. Development of phenolic resin‐based nanocomposites comprised of nanocarbon material remained as a research focus to outperform different properties of conventional material based components. In application, phenolic resin is the most popular binder in frictional components development such as brake pads, brake linings, and clutch facings, particularly used in many of light and medium automotive brake pad applications. Specifically, the present review study aims to provide thorough discussion on the mechanical, tribological, and thermal performances of phenolic resin‐based nanocomposites containing nanocarbon as a property modifier by comparing with the neat phenolic resin or with the composite containing other micro ingredients. As per presented overview, the analysis shows the significant improvement in some required application‐based properties of phenolic resin‐based nanocomposites such as tensile strength, young's modulus, impact strength, specific wear rate reduction, residue yield, and thermal conductivity due to the inclusion of nanocarbon, where the content of nanocarbons ranges about 0.5 wt% to 5 wt%. Hence nanocomposites synthesized using phenolic resin matrix with nanocarbons fillers found to have better mechanical strength, better wear resistance, and thermal stabilities when compared to pure phenolic resin and other composites.

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In-situ polymerization of graphene/SiO2 hybrids modified phenolic resin for improved thermal stability at an ultralow filler loading

Cited by 9 publications

References 27 publications

Enhanced Electrical Properties and Impact Strength of Phenolic Formaldehyde Resin Using Silanized Graphene and Ionic Liquid

Enhanced Electrical Properties and Impact Strength of Phenolic Formaldehyde Resin Using Silanized Graphene and Ionic Liquid

Development of SiO2/rGO from Rice Husk for Photocatalysis, Antioxidant, Electrochemical and Green Sensor Detection Studies

The effect of nanocarbon inclusion on mechanical, tribological, and thermal properties of phenolic resin‐based composites: An overview

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