Green synthesis of graphene with the assistance of modified lignin and its application in anticorrosive waterborne epoxy coatings

Wang, Shan; Hu, Zhuorong; Shi, Jun; Chen, Guokang; Zhang, Qian; Weng, Zengsheng; Wu, Kun; Lu, Mangeng

doi:10.1016/j.apsusc.2019.03.229

Cited by 105 publications

(45 citation statements)

References 53 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As shown in Figure 9, the H of the coating was significantly lower than that of the CWs in both natural wood and TMWs. The resin used in the waterborne polyacrylic lacquer was synthesized with water as the carrier, and the coating contained a large number of hydrophilic groups, so it also had the defects of poor resistance to water and low hardness [55,56]. After thermal modification, the H of the coating decreased, while the H of the CWs increased.…”

Section: Nanoindentation (Ni)mentioning

confidence: 99%

Effect of Thermal Modification on the Nano-Mechanical Properties of the Wood Cell Wall and Waterborne Polyacrylic Coating

Yang

et al. 2020

Forests

View full text Add to dashboard Cite

Masson pine (Pinus massoniana Lamb.) samples were heat-treated at different treatment temperatures (150, 170, and 190 °C), and the nano-mechanical properties of the wood cell wall, which was coated with a waterborne polyacrylic (WPA) lacquer product, were compared. The elastic modulus (Er) and hardness (H) of wood cell wall and the coating were measured and characterized by nanoindentation, and the influencing factors of mechanical properties during thermal modification were investigated by chemical composition analysis, contact angle analysis, and colorimetric analysis. The results showed that with the increase in the heat treatment temperature, the contact angle of the water on the wood’s surface and the colorimetric difference increased, while the content of the cellulose and hemicelluloses decreased. After thermal modification of 190 °C, the Er and H of the wood cell wall increased by 13.9% and 17.6%, respectively, and the Er and H of the WPA coating applied to the wood decreased by 12.1% and 22.2%. The Er and H of the interface between the coating and wood were lower than those near the coating’s surface. The Er and H of the cell wall at the interface between the coating and wood were lower than those far away from the coating. This study was of great significance for understanding the binding mechanism between coating and wood cell walls and improving the finishing technology of the wood materials after thermal modification.

show abstract

Section: Nanoindentation (Ni)mentioning

confidence: 99%

Effect of Thermal Modification on the Nano-Mechanical Properties of the Wood Cell Wall and Waterborne Polyacrylic Coating

Yang

et al. 2020

Forests

View full text Add to dashboard Cite

show abstract

“…Generally, it was reported that ±30 mV can be regarded as a standard to indicate the good stability of a dispersed system. [ 26 ] It can be concluded that the lignin aqueous solution in this paper was relatively stable, as 23.8 mV is slightly smaller than 30 mV as the alkali treatment of lignin in the production process helped to enhance the solubility of lignin. However, it should be noted that this relative stability was enough for the modification of LDH, as the modification process only lasted for 1 h. It has been reported that the LDH surface was positively charged due to the cationic nature of the exposed metal hydroxide layers based on the zeta potential result.…”

Section: Resultsmentioning

confidence: 92%

“…Lignin is the second richest biomass in nature, which makes up approximately 15–30 wt% of plants. [ 26 ] It is usually produced as a by‐product from pulping and bleaching industry. At present, most lignin from industry has not been effectively used due to the main application in combustion for production of heat and electricity.…”

Section: Introductionmentioning

confidence: 99%

Construction of ecofriendly anticorrosive composite film ZnAl‐LDH by modification of lignin on AA 7075 surface

Cao

Zheng

Lin

2021

Materials & Corrosion

View full text Add to dashboard Cite

In this study, an environment‐friendly composite ZnAl‐LDH film modified by the rich biomass lignin was prepared on AA 7075 surface successfully. A wide range of characterizations was carried out to obtain the morphology, composition, and structure of this composite film, including scanning electron microscopy, X‐ray diffraction, Fourier transform infrared spectroscopy (FTIR), and so on. In addition, FTIR was used to investigate the complexing interaction between layered double hydroxide (LDH) and lignin. Finally, the corrosion protection ability of this composite film was evaluated by electrochemical impedance spectroscopy in an immersion period of 7 days in NaCl solutions. The results indicated that the ZnAl‐LDH film modified by lignin could provide effective corrosion protection for the underlying substrate in the whole immersion period, with almost one order of magnitude higher of the corrosion resistance in comparison with that in the case of the blank ZnAl‐LDH film after immersion of 7 days. Such results could provide inspiring insights into the development of composite inhibitors based on LDH and biomass.

show abstract

“…Graphene nanoplatelet dispersions with polytetrafluoroethylene improve the friction coefficient, wear rate, and adhesion to the substrate [ 198 ]. Waterborne graphene dispersions with lignin–OH is reported that this lignin–OH on graphene surface enhances the anticorrosive properties [ 199 ]. rGO has been dispersed in waterborne polyesteramide and used as an anti-corrosive coating material for carbon steel strips [ 200 ].…”

Section: Applicationsmentioning

confidence: 99%

Recent Studies on Dispersion of Graphene–Polymer Composites

2021

View full text Add to dashboard Cite

Graphene is an excellent 2D material that has extraordinary properties such as high surface area, electron mobility, conductivity, and high light transmission. Polymer composites are used in many applications in place of polymers. In recent years, the development of stable graphene dispersions with high graphene concentrations has attracted great attention due to their applications in energy, bio-fields, and so forth. Thus, this review essentially discusses the preparation of stable graphene–polymer composites/dispersions. Discussion on existing methods of preparing graphene is included with their merits and demerits. Among existing methods, mechanical exfoliation is widely used for the preparation of stable graphene dispersion, the theoretical background of this method is discussed briefly. Solvents, surfactants, and polymers that are used for dispersing graphene and the factors to be considered while preparing stable graphene dispersions are discussed in detail. Further, the direct applications of stable graphene dispersions are discussed briefly. Finally, a summary and prospects for the development of stable graphene dispersions are proposed.

show abstract

Green synthesis of graphene with the assistance of modified lignin and its application in anticorrosive waterborne epoxy coatings

Cited by 105 publications

References 53 publications

Effect of Thermal Modification on the Nano-Mechanical Properties of the Wood Cell Wall and Waterborne Polyacrylic Coating

Effect of Thermal Modification on the Nano-Mechanical Properties of the Wood Cell Wall and Waterborne Polyacrylic Coating

Construction of ecofriendly anticorrosive composite film ZnAl‐LDH by modification of lignin on AA 7075 surface

Recent Studies on Dispersion of Graphene–Polymer Composites

Contact Info

Product

Resources

About