A new approach for enhancement of the corrosion protection properties and interfacial adhesion bonds between the epoxy coating and steel substrate through surface treatment by covalently modified amino functionalized graphene oxide film

2017 ◽  
Vol 123 ◽  
pp. 55-75 ◽  
Author(s):  
N. Parhizkar ◽  
T. Shahrabi ◽  
B. Ramezanzadeh
Keyword(s):  
Graphene Oxide ◽  
Oxide Film ◽  
Surface Treatment ◽  
Corrosion Protection ◽  
Interfacial Adhesion ◽  
Steel Substrate ◽  
Epoxy Coating ◽  
Functionalized Graphene ◽  
Functionalized Graphene Oxide ◽  
New Approach

Enhancement of barrier and corrosion protection performance of an epoxy coating through wet transfer of amino functionalized graphene oxide

2016 ◽  
Vol 103 ◽  
pp. 283-304 ◽  
Author(s):  
B. Ramezanzadeh ◽  
S. Niroumandrad ◽  
A. Ahmadi ◽  
M. Mahdavian ◽  
M.H. Mohamadzadeh Moghadam
Keyword(s):  
Graphene Oxide ◽  
Corrosion Protection ◽  
Epoxy Coating ◽  
Functionalized Graphene ◽  
Functionalized Graphene Oxide

scholarly journals One-Step Preparation of Hyperbranched Polyether Functionalized Graphene Oxide for Improved Corrosion Resistance of Epoxy Coatings

Coatings ◽  
2019 ◽  
Vol 9 (12) ◽  
pp. 844 ◽  
Author(s):  
Xuepei Miao ◽  
An Xing ◽  
Lifan He ◽  
Yan Meng ◽  
Xiaoyu Li
Keyword(s):  
Corrosion Resistance ◽  
Graphene Oxide ◽  
Acid Resistance ◽  
Epoxy Coating ◽  
Functionalized Graphene ◽  
Step Method ◽  
Epoxy Coatings ◽  
Functionalized Graphene Oxide ◽  
One Step ◽  
Hyperbranched Polyether

In this paper, hyperbranched polyether functionalized graphene oxide (EHBPE-GO) was prepared by a facile one-step method. Fourier transform infrared spectroscopy (FTIR), X-ray diffractometry (XRD), thermogravimetric analyzer (TGA), and trans-mission electron microscopy (TEM) results confirmed the formation of EHBPE-GO. Then, EHBPE-GO was cured with phenolic amides at room temperature to prepare epoxy coatings. The corrosion resistance of epoxy coatings was investigated systematically by using electrochemical and traditional immersion methods. Results show that a small amount of EHBPE-GO (8 wt % of Diglycidyl ether of bisphenol A (DGEBA)) in epoxy coating achieves 50% higher improvement in acid-resistance than unmodified neat DGEBA resin. For the nanocomposite epoxy coating, the superior acid-resistance is attributed to the increased crosslink density and the impermeable 2D structure of EHBPE-GO. This work provides a facile strategy to develop the effective improved corrosion resistance nanofiller for epoxy coating.

Effect of Amine Molecular Chain Length on the Mechanical and Thermal Properties of Functionalized Graphene Oxide/Polyurea Nanocomposites

2021 ◽  
Vol 13 (2) ◽  
pp. 199-208
Author(s):  
Qiang Zhao ◽  
Si Ouyang ◽  
Gang Chen ◽  
Yiqing Deng ◽  
Mengxiao Chen ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Photoelectron Spectroscopy ◽  
Chemical Conversion ◽  
Mechanical And Thermal Properties ◽  
Functionalized Graphene ◽  
Scanning Calorimetry ◽  
Functionalized Graphene Oxide ◽  
New Approach ◽  
Chain Lengths

To improve the overall performance of polyurea, linear diamines with three different chain lengths (1,2-ethylenediamine (EDA) and amino-terminated polyoxypropylenes D230 and D2000) were reacted with graphene oxide (GO) by reaction of amines with carboxyl groups, and three different amino-functionalized graphene oxide (AGO) nanosheets (EDA-GO, D230-GO and D2000-GO) were prepared. Subsequently, an AGO flake was bonded to a polyurea (PUA) substrate by an in situ chemical process. Analytical tests, including X-ray photoelectron spectroscopy (XPS), showed that diamines were attached to the GO flake. The reinforcement properties of the nanocomposites were investigated by differential scanning calorimetry (DSC), thermogravimetric analysis (TGA) and tensile testing. AGO nanosheets, especially EDA-GO, result in a certain degree of enhancement in the thermal and mechanical properties of nanocomposites formed with polyurea. The TGA and DSC results indicated that the T5% and Tg of the nanocomposites at low AGO loading were increased compared with those of pure polyurea. Meanwhile, the elongation at break of the nanocomposite film with 0.1 wt% EDA-GO loading was 240% higher than that of pure polyurea, and tensile strength was increased by 80% over that of pure polyurea. We provide a new approach to the chemical conversion of GO/PUA nanocomposites by preparing AGO and complexing it with polyurea.

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