Nano Composite Membranes of Poly(ether sulfone)s Containing Multi-Sulfonated Hexaphenylbenzene and SiO₂ for PEMFC

Abstract:

Poly (ether sulfone) membranes (PHP) were prepared with 25 mol% of 1,2-bis (4-hydroxybenzene)-3,4,5,6-tetraphenylbenzene (BHPTPB). BHPTPB has a conjugated propeller-like nonplanar conformation structure containing the peripheral seven aromatic rings which facilitate the formation of π-π interactions. A series of sulfonated poly (ethersulfone) s (SHP 25) was synthesized with concentrated sulfuric acid. The sulfonation took place selectively on the multiphenyl unit, and simultaneously on the side-chain phenyl groups. Composite membranes were prepared with copolymers and SiO₂ nanoparticles (20 nm, 4~10%wt). The composite membranes were cast from DMSO. A series of composite membranes structures and characteristic were evaluated by the ¹H-NMR spectroscopy, and thermal stabilities. The membranes were performed by ion exchange capacity (IEC), water uptake and proton conductivity.

• Periodical: Advanced Materials Research (Volume 746)
• Pages: 72-77
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.746.72
• Online since: August 2013
• Authors: Young Don Lim, Hoh Youn Jang, Young Tae Jeon, Young Gil Jo, Sang Young Lee, Hyun Ho Joo, In Seok Jeong, Min Yeong Ahn, Whan Gi Kim
• Keywords: Fuel Cell (FC), Multi Phenyl Monomer, Nanocomposite, Proton Exchange Membrane, SiO₂

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