Organic-inorganic materials methanol permeability

Nam et al. [26] used organic-inorganic nanocomposite material like Nafion/ poly(phenyhnethyl silsequioxane, PPSQ). Incorporation of PPSQ improved initial degradation temperature of Nafion membrane and increased the crystallinity of the recast composite membrane. The membrane was reported to have lower methanol permeability as compared with bare Nafion due to interruption of organic filler. 

Organic-inorganic (sPI-SiOa) interpenetrating networks appear to be very promising materials as sohd electrolytes for fuel cell applications. Lee et al. [144] showed that the presence of sihca reduces the membrane water uptake and methanol permeability, while it increases the membrane selectivity (Fig. 3.10). In addition, the formation of an organic IPN improves the hydrolytic stability of the material. Hence, the mechanical properties (tensile strength and elongation at break) are increased by a factor of 100. 

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