Novel manufacturing of intelligent hierarchical molybdenum-polydopamine hollow nanocarriers for smart coating

Improving the Anticorrosion and Self-Healing Properties of the Epoxy Coating Using the Mn–Zn2SiO4/PDA Composite

“…As shown in Figure d, taking the absorbance at 450 nm in the visible range as an example, the absorbance of PDA gradually decreases with lower pH. This indicates that PDA is unstable in acidic environments, which could be attributed to the reaction between H + and hydroxyl and amino groups in PDA, leading to the reduction of quinone structures in PDA to catechol structures and subsequent degradation of PDA. , On the other hand, under alkaline conditions, dopamine monomers can undergo self-polymerization reactions, reaching a reaction equilibrium and allowing for the stable presence of PDA …”

“…This indicates that PDA is unstable in acidic environments, which could be attributed to the reaction between H + and hydroxyl and amino groups in PDA, leading to the reduction of quinone structures in PDA to catechol structures and subsequent degradation of PDA. 44,45 On the other hand, under alkaline conditions, dopamine monomers can undergo self-polymerization reactions, reaching a reaction equilibrium and allowing for the stable presence of PDA. 46 The microstructure and morphology of the Zn 2 SiO 4 -based composite were studied using scanning electron microscopy (SEM).…”