Graphene has a unique nano-sheet structure and excellent electrical conductivity, mechanical properties and barrier properties. It is a research hotspot in the field of composite materials (coatings) in recent years. However, graphene is prone to agglomeration in a polymer resin matrix due to its high specific surface area and interlayer interaction, and it is not possible to fully exert the excellent characteristics of a single layer or a few layers of graphene, which limits its application in many fields. The organic functional coating group directed by researcher Wang Liping and the researcher Zhao Haichao of the Marine Functional Materials team of the Ningbo Institute of Materials Science and Technology of the Chinese Academy of Sciences has been working on the chemical and physical modification of graphene and the preparation and research of graphene multifunctional composite coating. Based on the π-π interaction between graphene and conductive polymer, the team prepared a soluble conductive polymer by controlled polymerization and combined with ultrasonic dispersion to achieve liquid phase stripping of graphene, which has a dispersion concentration in organic solvents for conventional coatings. At 5 mg/mL, the average thickness of the graphene sheets after peeling was 2-3 nm (Fig. 1). Corrosion resistance and lubrication of a small amount of exfoliated graphene (0.5%) epoxy composite coating by passivation of the conductive polymer to the coating substrate and shielding and self-lubricating effect of the two-dimensional nanosheet structure of graphene Both sex and wear resistance have been greatly improved. Related work has been published in the authoritative journal of carbon materials (Carbon, 2017, 114, 356–366) and applied for a national invention patent (application number). 
Figure 1. Schematic diagram of the preparation of graphene dispersion 
Figure 2. Corrosion resistance and wear resistance of graphene-modified composite coatings The hydrophobicity of graphene makes dispersion in water and aqueous resins difficult to achieve. The team prepared water-soluble conductive polymer latex nanoparticles as intercalation agents for graphene by microemulsion polymerization (Fig. 3), which achieved stable dispersion of graphene two-dimensional nanosheets in aqueous resin. On the one hand, the formation of a physical barrier layer in the matrix promotes the diffusion path of the corrosive medium and slows down the corrosion; on the other hand, the conductive polymer can form a dense passivation film on the metal surface, inhibit corrosion, and synergistically improve the resistance of the composite coating. Corrosive, and by scanning vibrating electrode technology (SVET) studies show that the coating has self-healing properties (Figure 4). Related work has been published in ACS Applied Material & Interfaces, 2017, 9, 34294−34304. 
Figure 3. Structure and electron micrograph of graphene hybrids; corrosion protection mechanism and corrosion resistance of hybrid composite coatings 
Figure 4. (a) Blank aqueous coating, (b) Conductive polymer composite coating (c) Local current density distribution at the defect of graphene hybrid composite coating. The above research work was obtained by the Chinese Academy of Sciences "Hundred Talents Program" (Y60707WR04) The Chinese Academy of Sciences Frontier Scientific Research Program (QYZDY-SSW-JSC009), the Zhejiang Graphene Major Science and Technology Special Project (2015C01SA790002) and the Zhejiang Natural Science Foundation (Y16B040008).
Figure 1. Schematic diagram of the preparation of graphene dispersion Figure 2. Corrosion resistance and wear resistance of graphene-modified composite coatings The hydrophobicity of graphene makes dispersion in water and aqueous resins difficult to achieve. The team prepared water-soluble conductive polymer latex nanoparticles as intercalation agents for graphene by microemulsion polymerization (Fig. 3), which achieved stable dispersion of graphene two-dimensional nanosheets in aqueous resin. On the one hand, the formation of a physical barrier layer in the matrix promotes the diffusion path of the corrosive medium and slows down the corrosion; on the other hand, the conductive polymer can form a dense passivation film on the metal surface, inhibit corrosion, and synergistically improve the resistance of the composite coating. Corrosive, and by scanning vibrating electrode technology (SVET) studies show that the coating has self-healing properties (Figure 4). Related work has been published in ACS Applied Material & Interfaces, 2017, 9, 34294−34304. Figure 3. Structure and electron micrograph of graphene hybrids; corrosion protection mechanism and corrosion resistance of hybrid composite coatings Figure 4. (a) Blank aqueous coating, (b) Conductive polymer composite coating (c) Local current density distribution at the defect of graphene hybrid composite coating. The above research work was obtained by the Chinese Academy of Sciences "Hundred Talents Program" (Y60707WR04) The Chinese Academy of Sciences Frontier Scientific Research Program (QYZDY-SSW-JSC009), the Zhejiang Graphene Major Science and Technology Special Project (2015C01SA790002) and the Zhejiang Natural Science Foundation (Y16B040008).PHROXI ABS pull-down spray head Kitchen Faucet made of high quality materials.This well-designed faucet features a ceramic disc cartridge.
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