Branched Sulphonated Multi Block Copolymer Fuel Cell Membrane

The patent applies local quality by creating distinct hydrophobic blocks and hydrophilic blocks with different functions. The hydrophobic blocks (containing sulfonic acid groups) provide proton conductivity locally, while the hydrophilic blocks maintain mechanical integrity and chemical stability. This spatial separation of functions allows the membrane to achieve high proton conductivity without sacrificing mechanical properties.

The patent uses composite materials by combining hydrophobic blocks (with sulfonic acid groups for proton conduction) and hydrophilic blocks (for mechanical strength and stability) into a multi-block copolymer structure. This composite approach enables the membrane to simultaneously achieve high proton conductivity and maintain excellent mechanical properties, resolving the contradiction between these two requirements.

The patent applies local quality by concentrating sulfonic acid groups in specific hydrophobic blocks while maintaining hydrophilic blocks that provide chemical stability. This localized distribution allows high proton conductivity in the hydrophobic regions while the hydrophilic regions maintain overall chemical stability of the membrane structure.

The composite multi-block copolymer structure combines hydrophobic blocks (providing proton conductivity through sulfonic acid groups) with hydrophilic blocks (providing chemical stability). This composite design enables the membrane to achieve high proton conductivity without compromising chemical stability, as the hydrophilic blocks protect the overall structure from degradation.

The patent applies preliminary action by incorporating sulfonic acid groups into the polymer structure during the polymerization step, before the membrane formation process. This allows precise control over the distribution and location of sulfonic acid groups within the hydrophobic blocks, enabling regulated placement rather than random post-sulfonation modification.

The patent uses segmentation by dividing the polymer into distinct hydrophobic blocks (containing sulfonic acid groups) and hydrophilic blocks. This segmentation allows independent control and regulation of sulfonic acid group distribution within the hydrophobic blocks, achieving precise manufacturing control over their location and concentration.

The patent applies this principle by using hydrocarbon-based polymers (cheaper materials) instead of expensive perfluorinated polymers. While hydrocarbon polymers may have shorter operational lifespan, the multi-block copolymer structure with controlled sulfonic acid group distribution compensates for this, providing adequate chemical stability and mechanical properties at lower cost, making it economically viable for fuel cell applications.

The patent uses composite materials by combining hydrocarbon-based hydrophobic blocks with hydrophilic blocks to create a multi-block copolymer that mimics the performance of perfluorinated polymers. This composite approach achieves comparable chemical stability and mechanical properties using cheaper hydrocarbon materials, reducing cost while maintaining necessary performance characteristics.

The patent applies preliminary action by incorporating the sulfonic acid groups and forming the multi-block structure during the polymerization step itself. This preliminary incorporation eliminates the need for separate post-sulfonation steps and complex processing, simplifying the overall production process while maintaining high membrane performance through the controlled multi-block architecture.

The patent merges multiple functions into a single polymerization step, where the multi-block copolymer structure with sulfonic acid groups is formed in one process. This merging of polymerization and functional group incorporation simplifies production by eliminating separate steps for structure formation and sulfonation, reducing production complexity while achieving high membrane performance.