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Recent Advances in Polypyrrole-Based Functional Coatings: Surface Protection and Emerging Applications
Ge Cao1,2, Qiuyuan Huang2,3, Yueying Li2
1School of Textile, Guangdong Polytechnic, Gaoming, Foshan 528000, China.
Materials (Basel, Switzerland)
|June 12, 2026
Summary
Polypyrrole (PPy) coatings offer advanced functionalities for surface protection and emerging applications. This review highlights PPy
Area of Science:
- Materials Science
- Polymer Chemistry
- Surface Engineering
Background:
- Polypyrrole (PPy) possesses inherent electrical conductivity, redox activity, and structural versatility.
- PPy is a key material for advanced functional coatings with diverse properties.
Purpose of the Study:
- To review recent advances in polypyrrole (PPy)-based coatings.
- To explore the link between PPy material design and multifunctional applications.
- To summarize current challenges and future directions for PPy coatings.
Main Methods:
- Electrochemical deposition
- Chemical oxidative polymerization
- Solution processing
- Hybrid composite engineering
Main Results:
- PPy coatings enhance surface protection via corrosion mitigation, mechanical durability, and environmental barriers.
- PPy applications extend to electromagnetic interference (EMI) shielding, smart sensing, energy interfaces, and biomedical electrodes.
- Key challenges include trade-offs in conductivity, adhesion, and stability.
Conclusions:
- Next-generation PPy coatings are expected to integrate green processing and smart systems.
- Future PPy coatings will address demands in flexible electronics, sustainable energy, and precision medicine.
