Preparation and characterization of surface-sulfonated phenylsilsesquioxane-methylsilsesquioxane particles

作者：Daiko Yusuke^*; Katagiri Kiyofumi; Ogura Kota; Sakai Mototsugu; Matsuda Atsunori

来源：Solid State Ionics, 2007, 178(7-10): 601-605.

DOI：10.1016/j.ssi.2007.01.021

• proton conduction
• fuel cell
• phenylsilsesquioxane
• sulfonation
• sol-gel

Thermally and chemically stable proton conductors were prepared via surface-sulfonation of sol-gel-derived phenylsilsesquioxane-methylsilsesquioxane (PhSiO3/2-MeSiO3/2) particles in a range from 250 to 650 nm in diameter. MeSiO3/2 component was indispensable to improve the chemical durability against sulfonation solvent. Proton conductivity of the pelletized samples prepared using the sulfonated PhSiO3/2-MeSiO3/2 particles increased linearly with increasing the ion exchange capacity (IEC) of the particles. The mobility (mu) of proton was calculated to be 0.3 x 10(-4) cm(2)/V s. Porous PhSiO3/2-MeSiO3/2 particles prepared using a cationic surfactant of cetyltrimethylammonium bromide (CTAB) as a template of pores showed higher both IEC and water uptake, leading to an increase in proton conductivity to similar to 10(-2) S/cm at 80 degrees C and 80% relative humidity.

• 出版日期2007-4