Ultrablack wool textiles inspired by hierarchical avian structure
5 days ago
- #biocompatible
- #ultrablack
- #textile
- Ultrablack wool fabrics achieve an average total reflectance of 0.13% (400–700 nm), making them the darkest reported fabrics.
- The two-step fabrication method involves polydopamine (PDA) dyeing and plasma etching, creating nanofibrils for light absorption.
- Unlike synthetic ultrablack materials, ultrablack wool retains breathability, flexibility, and biocompatibility.
- The fabric exhibits wide-angle ultrablack performance, maintaining low reflectance across a 120° angular span.
- Environmental and mechanical tests confirm the material's durability and wash-fastness.
- FDTD modeling reveals that nanopores and bundle structures enhance light trapping, reducing reflectance.
- The method is scalable and compatible with textile industry standards, offering multiple plasma etching parameters.