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Published on: August 29, 2017
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Flexible Inverse Opal Structural Color Films with High Strength and Harsh Environment Stability
Wentao Wang1, Lin Zhang1, Gaochong Zhao1
1School of Materials Science and Engineering, Zhejiang Sci-Tech University, Hangzhou, Zhejiang 310018, People's Republic of China.
ACS Applied Materials & Interfaces
|November 6, 2024
Summary
This study introduces a new poly(m-phenyleneisophthalamide) inverse opal (PMIA IO) film for vivid structural colors. The PMIA IO film offers exceptional durability, harsh environment stability, and flame retardancy for demanding applications.
Area of Science:
- Materials Science
- Nanotechnology
- Polymer Chemistry
Background:
- Flexible photonic crystals (PCs) offer structural color but often lack durability and fire safety.
- Existing polymer-bound PCs degrade under stress and harsh conditions, losing color and posing fire risks.
Purpose of the Study:
- To develop a robust, stable, and flame-retardant structural color film.
- To overcome the limitations of conventional polymer-based photonic crystals.
Main Methods:
- Fabrication of poly(m-phenyleneisophthalamide) inverse opal (PMIA IO) films using a sacrificial SiO2 PC template.
- Characterization of structural color, mechanical properties, environmental stability, and flame retardancy.
Main Results:
- PMIA IO films exhibit vivid structural colors with high mechanical robustness and stability across various harsh conditions (stress, temperature, chemicals, UV).
- The films demonstrate excellent flame retardancy, achieving a limiting oxygen index (LOI) of 28 vol % and a V0 rating.
- Achieved combination of structural color, mechanical strength, environmental stability, and flame retardancy simultaneously.
Conclusions:
- The developed PMIA IO films offer a promising solution for advanced structural color materials.
- These films possess unique properties suitable for demanding applications in fire protection, defense, aviation, marine, and aerospace.
