| 초록 |
Organic/inorganic composite membranes were prepared using sulfonated poly(vinyl alcohol) (SPVA), mixed and cross-linked with various compositions of poly(vinyl alcohol)-grafted graphene oxide (PVA-g-GO). The introduction of PVA-g-GO to the membranes not only positively affected the mechanical properties but also reduced the methanol permeability: Increasing the PVA-g-GO content increased the blocking effect of GO. The PVA-g-GO/SPVA membranes were cross-linked with glutaraldehyde, resulting in the arrangement of cross-linking chains within the matrix, and between the matrix and the filler. Therefore, the structure of the PVA-g-GO/SPVA cross-linking membrane was different from that of the existing membranes. This structure also reduced the permeability of methanol. This novel membranes exhibited proton conductivities ranging from 0.0141 to 0.0319 S/cm at 60 °C as well as methanol permeability ranging from 3.13×10−7 to 1.53×10−7cm2s−1 at 25 °C. |
