Bioinspired Three-Component System to Prepare Full-Color Functional Biomimetic Pigments

Area of Science:

• Materials Science
• Biochemistry
• Polymer Chemistry

Background:

• Natural melanin offers valuable optical, electronic, and radiation protection properties but suffers from limited color range, complex synthesis, and poor solubility.
• Current synthetic pigments often lack the safety and functionality of natural biopigments.

Purpose of the Study:

• To develop novel melanin-like polymeric pigments with tunable physicochemical properties.
• To overcome the limitations of natural melanin for broader applications.
• To combine the safety of biopigments with the color diversity of synthetic dyes.

Main Methods:

• A simple three-component reaction system was employed for pigment synthesis.
• Rational design of substrates and dopants allowed for artificial control of chromophore structures.
• Characterization of pigment properties including color, stability, antioxidant activity, and dyeing capabilities.

Main Results:

• A series of melanin-like polymeric pigments with amino acid-encoded properties were successfully synthesized.
• The pigments exhibited iridescent colors, strong tinting strength, and excellent stability.
• The synthesized pigments demonstrated significant antioxidant activity, comparable to natural melanin's photoprotective effects.

Conclusions:

• The developed melanin-like polymeric pigments offer a sustainable and versatile alternative to traditional pigments.
• These biomimetic pigments possess tunable properties, making them suitable for diverse applications.
• Potential applications include bioactive chromophores for clothing and hair dyeing, food additives, and anticounterfeiting technologies.