Functionalized graphene/polymer composite coatings for autonomous early-warning of steel corrosion

2018 ◽  
Vol 9 ◽  
pp. 6-10 ◽  
Author(s):  
Jing Li ◽  
Zhiyuan Jiang ◽  
Lingzhu Gan ◽  
Hanxun Qiu ◽  
Guangzhi Yang ◽  
...  
Keyword(s):  
Polymer Composite ◽  
Early Warning ◽  
Composite Coatings ◽  
Steel Corrosion ◽  
Functionalized Graphene

Tribological Performance of Polymer Composite Coatings Modified With La2O3 and MoS2 Nanoparticles

2019 ◽  
Vol 141 (11) ◽  
Author(s):  
Dongya Zhang ◽  
Zhongwei Li ◽  
Feng Gao ◽  
Xian Wei ◽  
Yuquan Ni
Keyword(s):  
Friction Coefficient ◽  
Wear Rate ◽  
Composite Coating ◽  
Polymer Composite ◽  
Polyvinylidene Fluoride ◽  
Composite Coatings ◽  
Tribological Performance ◽  
Pin On Disc ◽  
Mos2 Nanoparticles ◽  
Babbitt Alloy

Abstract In this study, composite coatings of polyvinylidene fluoride (PVDF) and epoxy resin deposited with La2O3 and MoS2 nanoparticles on the surface of a Babbitt alloy have been studied in order to improve its tribological performance. A pin-on-disc tribometer was used to evaluate the tribological properties of the Babbitt alloys with and without the composite coatings. The results showed that compared with the polymer-La2O3 composite coating, the polymer-MoS2 composite coating was more effective in reducing the friction coefficient and the wear rate of the Babbitt substrate under both dry and boundary lubrication conditions compared with the polymer-La2O3 composite coating. However, the wear rate of the Babbitt alloy with the polymer-La2O3 composite coating was lower than that of the alloy with the polymer-MoS2 composite coating. The wear scratches were analyzed using a scanning electron microscope (SEM). The worn surface of the polymer-La2O3 coating was much smoother and more continuous than that of the polymer-MoS2 coating, meanwhile transfer films were respectively detected on the pin surfaces. The addition of nanoparticles can reduce the wear rate and friction coefficient of polymer composite coating by forming a transfer film. Hence, the polymer composite coating can protect the Babbitt substrate.

scholarly journals Synthesis of Silane Functionalized Graphene Oxide and Its Application in Anti-Corrosion Waterborne Polyurethane Composite Coatings

Coatings ◽  
2019 ◽  
Vol 9 (9) ◽  
pp. 587 ◽  
Author(s):  
Chao Chen ◽  
Shicheng Wei ◽  
Bin Xiang ◽  
Bo Wang ◽  
Yujiang Wang ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Corrosion Rate ◽  
Electrochemical Impedance ◽  
Composite Coatings ◽  
Condensation Reaction ◽  
Waterborne Polyurethane ◽  
Functionalized Graphene ◽  
Functionalized Graphene Oxide ◽  
Polyurethane Composite ◽  
Modified Graphene Oxide

In this study, novel silane functionalized graphene oxide (PVSQ-GO) composite material is synthesized through the hydrolysis condensation reaction of vinyl triethoxysilane monomers occurred at the surface of graphene oxide. Results obtained from FTIR, Raman, X-ray photoelectronic spectroscopy (XPS), XRD and TGA measurements reveal that polyvinyl sesquisiloxane microspheres adhere to graphene oxide lamellae in the form of chemical bonds. Meanwhile, it is intuitive that abundant polyvinyl sesquisiloxane microspheres stick to the surface of graphene oxide and increase the thickness of the flake. Modified graphene oxide changes from hydrophilicity to hydrophobicity were owing to the existence of polyvinyl sesquisiloxane microspheres on the surface of graphene oxide (GO). PVSQ-GO composite exhibited good dispersion in eco-friendly waterborne polyurethane coating. Electrochemical impedance spectroscopy manifested that the anti-corrosion performance of waterborne polyurethane (WPU) coating embedded at 0.5 wt.% PVSQ-GO composite improved effectively. Tafel curves reveal that 0.5 wt.% PVSQ-GO/WPU coating specimen shows the lowest corrosion rate of 8.95 × 10−5 mm/year when compared with the other coating specimens. The good anti-corrosion abilities of PVSQ-GO composite coating can be interpreted as the good compatibility between PVSQ-GO composite and waterborne polyurethane, however, the intrinsic hydrophobicity of PVSQ-GO composite is beneficial to inhibit the permeation of corrosive medium and thus slows down the corrosion rate.

scholarly journals A novel surface plasmon resonance sensor based on a functionalized graphene oxide/molecular-imprinted polymer composite for chiral recognition of l-tryptophan

RSC Advances ◽  
2018 ◽  
Vol 8 (57) ◽  
pp. 32538-32544 ◽  
Author(s):  
Xiaoyan Xu ◽  
Yi Zhang ◽  
Bingfeng Wang ◽  
Lin Luo ◽  
Zhenlin Xu ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Polymer Composite ◽  
Chiral Recognition ◽  
Functionalized Graphene ◽  
Imprinted Polymer ◽  
Functionalized Graphene Oxide ◽  
Molecularly Imprinted ◽  
Recognition Element ◽  
Spr Sensor ◽  
Resonance Sensor

Novel SPR sensor for chiral recognition of l-tryptophan using a functionalized graphene oxide/molecularly-imprinted polymer composite as a recognition element.

scholarly journals A Review on Conducting Polymers and Nanopolymer Composite Coatings for Steel Corrosion Protection

Coatings ◽  
2019 ◽  
Vol 9 (12) ◽  
pp. 807 ◽  
Author(s):  
Haibin Xu ◽  
Yixia Zhang
Keyword(s):  
Conducting Polymers ◽  
Corrosion Protection ◽  
Composite Coatings ◽  
Steel Corrosion ◽  
Polymer Coatings ◽  
Future Research ◽  
Coating Technology ◽  
Hydrophobic Coatings ◽  
Steel Material ◽  
Coating Method

Corrosion is the principal reason for causing degradation of steel material properties, and coating is one of the most popular and effective ways to protect steel from corrosion. There are many kinds of coatings with different constituents, mechanisms and effectiveness. This paper presents a comprehensive review on the development of coating technology including traditional coatings, hydrophobic coatings, conducting polymer coatings and nanopolymer composite coatings. In particular, conducting polymers and nanopolymer composite coatings are reviewed in detail, which are the most popular and promising coatings. The advantages and limitations of each coating method as well as the influencing factors on corrosion protection are elaborated. Finally, the future research and applications are proposed.

Tortuosity but not Percolation: Design of Graphene Nanocomposite Coatings for the Extended Corrosion Protection of Aluminum Alloys

2019 ◽  
Author(s):  
Rachel Davidson ◽  
Yenny Cubides ◽  
Coleman Fincher ◽  
Chelsea McLain ◽  
Matt Pharr ◽  
...  
Keyword(s):  
Aluminum Alloy ◽  
Aluminum Alloys ◽  
Corrosion Protection ◽  
Corrosion Inhibition ◽  
Polymer Composite ◽  
Composite Coatings ◽  
Exfoliated Graphite ◽  
Nanocomposite Coatings ◽  
Graphene Nanocomposite ◽  
Aluminum Alloy 7075

Corrosion inhibition offered by unfunctionalized exfoliated graphite polymer composite coatings for protection of aluminum alloy 7075 substrates is described.

Tortuosity but not Percolation: Design of Graphene Nanocomposite Coatings for the Extended Corrosion Protection of Aluminum Alloys

2019 ◽  
Author(s):  
Rachel Davidson ◽  
Yenny Cubides ◽  
Coleman Fincher ◽  
Chelsea McLain ◽  
Matt Pharr ◽  
...  
Keyword(s):  
Aluminum Alloy ◽  
Aluminum Alloys ◽  
Corrosion Protection ◽  
Corrosion Inhibition ◽  
Polymer Composite ◽  
Composite Coatings ◽  
Exfoliated Graphite ◽  
Nanocomposite Coatings ◽  
Graphene Nanocomposite ◽  
Aluminum Alloy 7075

Corrosion inhibition offered by unfunctionalized exfoliated graphite polymer composite coatings for protection of aluminum alloy 7075 substrates is described.

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