Incorporation of silica network and modified graphene oxide into epoxy resin for improving thermal and anticorrosion properties

2020 ◽  
Vol 137 (45) ◽  
pp. 49405
Author(s):  
Yankun Xie ◽  
Weiqu Liu ◽  
Liyan Liang ◽  
Chunhua Liu ◽  
Maiping Yang ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Epoxy Resin ◽  
Silica Network ◽  
Modified Graphene Oxide ◽  
Modified Graphene ◽  
Anticorrosion Properties

scholarly journals Synthesis of modified graphene oxide and its improvement on flame retardancy of epoxy resin

2019 ◽  
Vol 137 (1) ◽  
pp. 47710 ◽  
Author(s):  
Wenqian Wu ◽  
Yiting Xu ◽  
Haiyang Wu ◽  
Jinmei Chen ◽  
Min Li ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Epoxy Resin ◽  
Flame Retardancy ◽  
Modified Graphene Oxide ◽  
Modified Graphene

Preparation and Properties of Tea Polyphenol Modified Graphene Oxide/Epoxy Resin Composites

2019 ◽  
Vol 814 ◽  
pp. 3-11
Author(s):  
Xiang Yu Ren ◽  
Hui Chen ◽  
Jing Wu ◽  
Hong Bo Liu
Keyword(s):  
Graphene Oxide ◽  
Epoxy Resin ◽  
Thermo Gravimetric Analysis ◽  
Testing Machine ◽  
Gravimetric Analysis ◽  
Resin Composites ◽  
X Ray ◽  
Modified Graphene Oxide ◽  
Epoxy Resin Composites ◽  
Modified Graphene

Microcrystalline graphite (MG) was used as raw material and oxidated by Hummers method. And further the graphene oxide (GO) was obtained by ultrasonic stripping. The TP modified graphene (TPG) was prepared by the surface grafting of pure natural green tea extract tea polyphenols (TP) on the surface of GO. Finally, the TPG/epoxy resin composite was prepared by solution blending and heat-curing moulding method.The characterization of structure and properties of TPG was analyzed by X ray diffraction pattern (XRD), infrared spectroscopy (FT-IR), thermo gravimetric analysis (TGA) and X ray photoelectron spectroscopy (XPS). A universal material testing machine was used to test the mechanical properties of epoxy resin composites with different addition of TPG. Field emission scanning electron microscopy (SEM) was used to observe the tensile-sectional morphology of the composites. The thermal stability of the composites was investigated by thermogravimetry and thermal dilatometer. The experimental results showed that the TP molecule was successfully grafted on the oxygen-containing functional groups of the GO surface through the phenolic hydroxyl group.When the addition of TPG was 1.0 wt%, the decomposition temperature of the epoxy resin was increased by 22.2 °C,and the surface resistivity decreased from 1.35×1014 Ω·m to 1.7×109 Ω·m. When the added amount of TPG was 0.5 wt%, the tensile strength of composites was increased by 13.5% reaching 59.85 MPa.

scholarly journals Improving the Tribological and Anticorrosion Performance of Waterborne Polyurethane Coating by the Synergistic Effect between Modified Graphene Oxide and Polytetrafluoroethylene

Nanomaterials ◽  
2020 ◽  
Vol 10 (1) ◽  
pp. 137 ◽  
Author(s):  
Tao Bai ◽  
Lei Lv ◽  
Weiping Du ◽  
Wenqi Fang ◽  
Yansong Wang
Keyword(s):  
Graphene Oxide ◽  
Synergistic Effect ◽  
Composite Coating ◽  
Waterborne Polyurethane ◽  
Isophorone Diisocyanate ◽  
Modified Graphene Oxide ◽  
Mass Fractions ◽  
Anticorrosion Performance ◽  
Modified Graphene ◽  
Anticorrosion Properties

In this work, the effect of modified graphene oxide and polytetrafluoroethylene (PTFE) on the tribological and anticorrosion properties of waterborne polyurethane (WPU) was studied. The modified graphene oxide (MGO) was obtained by the surface functionalization modification of graphene oxide (GO) with isophorone diisocyanate (IPDI), and MGO/WPU composite coating and MGO-PTFE/WPU composite coating with different mass fractions of MGO were prepared. The tribological and electrochemical experiment results demonstrated that the tribological properties of the coating and the corrosion resistance of the worn coating were effectively enhanced under the synergistic effect of MGO and PTFE. Finally, a mechanism was proposed to explain the improvement in anticorrosion performance of the worn coating.

scholarly journals Polydopamine Modified Graphene Oxide-TiO2 Nanofiller for Reinforcing Physical Properties and Anticorrosion Performance of Waterborne Epoxy Coatings

2019 ◽  
Vol 9 (18) ◽  
pp. 3760 ◽  
Author(s):  
Shuli Wang ◽  
Jiankang Zhu ◽  
Yongchao Rao ◽  
Beibei Li ◽  
Shuhua Zhao ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Physical Properties ◽  
Epoxy Resin ◽  
Nano Tio2 ◽  
X Ray ◽  
Tio2 Particles ◽  
Modified Graphene Oxide ◽  
Waterborne Epoxy ◽  
Waterborne Epoxy Resin ◽  
Modified Graphene

Nano-polydopamine-graphene oxide-TiO2 (nano-PDA@GO-TiO2) composites were prepared by dopamine modified graphene oxide (GO) and loaded nano-TiO2 on the surface of GO. The structure and morphology of nano-PDA@GO-TiO2 composites were characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), Raman, X-ray photoelectron spectroscopy (XPS), Scanning electron microscope (SEM), and Transmission electron microscope (TEM) Results demonstrate that the introduction of dopamine to functionalize the GO could self-polymerize polydopamine (PDA) on the surfaces of the GO and endow abundant chemical groups reduce the GO. The interaction between the GO and nano-TiO2 particles could prevent graphene nanosheets from restacking and nano-TiO2 particles from agglomeration. Nano-PDA@GO-TiO2 composite material was used as the nano-filler, and nano-PDA@GO-TiO2 composites waterborne epoxy resin coatings (PGT/WEP) were prepared by dispersing a different content of nano-PDA@GO-TiO2 composites into waterborne epoxy resin with the help of ultrasonic dispersion and mechanical agitation. The physical properties of PGT/WEP coatings, such as hardness, impact resistance, and adhesion, were tested and the electrochemical performance was evaluated. The results show that dispersing 2% nano-PDA@GO-TiO2 composites in waterborne epoxy resin could significantly improve the physical properties and corrosion resistance of waterborne epoxy resin coating when compared with pure waterborne epoxy coating.

scholarly journals Imidazolium Ionic Liquid Modified Graphene Oxide: As a Reinforcing Filler and Catalyst in Epoxy Resin

Polymers ◽  
2017 ◽  
Vol 9 (12) ◽  
pp. 447 ◽  
Author(s):  
Qing Lyu ◽  
Hongxia Yan ◽  
Lin Li ◽  
Zhengyan Chen ◽  
Huanhuan Yao ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Graphene Oxide ◽  
Epoxy Resin ◽  
Imidazolium Ionic Liquid ◽  
Modified Graphene Oxide ◽  
Modified Graphene ◽  
Reinforcing Filler
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