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Apexazole® Polybenzimidazole PBI Membrane
Apexazole® PBI membrane is a high-performance polymeric separation membrane featuring a benzimidazole heterocyclic backbone. Thanks to its unique molecular structure, it exhibits exceptional thermal stability, chemical resistance, and mechanical properties, making it a critical material for extreme operating conditions.
Its rigid aromatic–heteroaromatic rings and a robust intermolecular hydrogen-bonding network confer exceptional thermal stability—glass transition temperature exceeds 420°C, and the onset of thermal decomposition reaches 600°C. The material can operate stably for extended periods in anhydrous conditions at 160–200°C, with performance surpassing that of conventional perfluorosulfonic acid membranes. Moreover, it exhibits excellent resistance to acids, bases, and organic solvents, high mechanical strength, and outstanding flame retardancy (limiting oxygen index of 58).
The material is prepared via solution casting, phase inversion, and other processes, enabling the fabrication of various morphologies. Phosphoric acid doping enhances its proton conductivity, making it a key electrolyte material for high-temperature proton exchange membrane fuel cells.
Moreover, it is widely employed in high-temperature gas separation, organic solvent nanofiltration, and other fields, demonstrating significant application value in the new energy, environmental protection, and chemical industries.
Core advantages of Apexazole® PBI material:
- Excellent chemical stability: resistant to strong acids, strong bases, and oxidizing agents.
- Outstanding thermal stability: the thermal decomposition temperature can reach 450–600°C.
- High mechanical strength: The rigid structure of the polymer chains imparts excellent mechanical properties.
- Tunable structure: Properties can be flexibly tailored through methods such as sulfonation, crosslinking, and blending.
- Cost potential: significantly lower than that of perfluorosulfonic acid membranes (Nafion)
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No. 1, Juhe Sixth Street, Jufuyuan Industrial Park, Economic Development Zone, Tongzhou District, Beijing – 6638
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