Mixed-Solvent-Mediated Strategy for Enhancing Light Absorption of Polydopamine and Adhesion Persistence of Dopamine Solutions

Abstract

Mussel-inspired polydopamine (PDA) and its derivative materials have exhibited a huge potential as a facile and versatile route to fabricate multifunctional coatings on virtually any substrate surface. However, their performance and applicability are frequently obstructed by limited optical absorption in visible regions of PDA and poor surface adhesion persistence of dopamine solutions. Herein, we report a facile strategy to improve these problems by rationally regulating the dopamine polymerization pathway through mixed-solvent-mediated periodate oxidation of dopamine. The spectral analysis, ultrahigh-performance liquid chromatography coupled with high-resolution mass spectrometry, and density functional theory simulations systematically demonstrate that the mixed-solvent reaction systems can effectively accelerate the periodate-induced formation of cyclized moieties in the PDA microstructure and inhibit their further oxidative cleavage, thus contributing to narrowing the inherent energy band gap of PDA and improving the long-lasting surface deposition performance of aged dopamine solutions. Moreover, the newly constructed cyclized species-rich PDA coatings have excellent surface uniformity and significantly enhanced chemical stability. Benefiting from these fascinating properties, they have been further used for permanent dyeing of natural gray hair with remarkably improved blackening effect and excellent practicability, which exhibited their promising prospect in real-world applications.

Bimetallic Gold/Silver and Bioactive Camptothecin Hybrid Nanoparticles for Eradication of Cancer Stem Cells in a Combination Manner

“…Dopamine, which was inspired by adhesive protein in mussels, could spontaneously self-polymerize into polydopamine (PDA) in the presence of oxygen under alkaline conditions . There were versatile functional groups (catechol and amine groups) from PDA contributing to their metal ion chelating capacity, redox activity, and adhesive property.…”

Nature-inspired safe and efficient hair dyes: beyond the traditional hair dyes

“…Very recently, light absorption-enhanced PDA was successfully prepared through a methanol and periodate-mediated solvent mixture without doping additional molecules. 102 In this study, methanol could disrupt the strong hydrogen bonding between water molecules and the catechol groups of PDA via the formation of new strong hydrogen bonds with water molecules, thus promoting the cyclization of DA to form DHI and dopamine quinone (DAC). At the same time, the introduction of methanol could effectively inhibit the further peroxidative cleavage and carboxylation process of cyclization intermediates induced by periodate, which actively improves the planarity of the microscopic network structure within PDA, resulting in a decreased energy band gap and improved light absorption properties.…”

Emerging polymeric materials for treatment of oral diseases: design strategy towards a unique oral environment

“…One strategy to enhance the stability of DOPA is the combination of stabilizers or antioxidants with adhesives to prevent oxidation. 115,116 Despite the drawbacks associated with DOPA, it remains a noteworthy component in the fields of biomedicine and materials science, particularly in the study of biomimetic adhesives. Efforts have been continuously devoted to overcoming these limitations to enhance its feasibility and performance in clinical applications.…”