Graphene oxide is an ideal nanofiller for epoxy resins because of its excellent mechanical properties, high thermal resistance, and abundant oxygen-containing functional groups. However, the poor dispersion of graphene oxide in epoxy resins restricts its application in corrosive environments. In this study, epoxy coating was prepared by incorporating triethanolamine (TEA)-modified graphene oxide (TEA-GO-EP). TEA acted as a modification agent for graphene oxide to improve its dispersion in epoxy and corrosion inhibitor for the underlying copper substrate. The long-term potentiodynamic polarization and electrochemical impedance spectroscopy results demonstrated the improved anti-corrosion performance of the TEA-GO-EP coatings in 3.5 wt.% NaCl aqueous solution, compared with the coatings without TEA. Moreover, the anti-corrosion mechanism was discussed in detail. The findings reported in this paper have important implications for developing new types of eco-friendly epoxy-based coatings.

In the production process of biomass energy with crop straw as the raw material, the indoor dust environment created by smashed plant fiber can affect the health of workers and lead to the risk of fire and explosions. The physical properties of biomass vary with the ambient air conditions, resulting in different deposition processes for airborne biomass particles. In this study, the deposition of biomass particles in different environments in an experimental chamber was examined by independently controlling the internal temperature and relative humidity. The results show that in the ambient temperature range of 20~40 °C and at a relative humidity of 25~65%, the water absorption rates of the biomass particles were 15.4~24.7%. The deposition rates of the airborne biomass particles with different sizes were 0.9~2.9 h−1, which positively correlated with the particle sizes in the same ambient conditions. The increase in ambient temperature and relative humidity promoted the deposition of biomass particles with diameters over 0.5 μm. For the particles with diameters below 0.5 μm, the deposition rates were nonlinearly related to the ambient temperature and relative humidity and were greater at lower temperatures. The significance levels of the factors influencing the particle deposition were particle size > ambient temperature > ambient relative humidity. For the biomass particles below 0.5 μm, the influence of the relative humidity on the deposition was much weaker than that of the temperature.