The straight nanopores in cellulose acetate (CA) polymers for battery gel separators were generated by utilizing both hydrated metal salts and water pressure. When polymer film was exposed to water pressure, the continuous nanopores were generated after complexing with hydrated metal salts. These results could be explained by that polymer chains were weakened because of the plasticization effect of the hydrated regions incorporated into the CA. Pore size could also be easily controlled by adjusting the water pressure. The generated pores in CA polymers were confirmed by scanning electron microscopy (SEM) images. The coordinate interactions between CA polymer and metal salts, and ionic states of metal salts were investigated by FT-IR and Raman spectroscopy, respectively.

• 강상욱(상명대학교 화학에너지공학과) | Sang Wook Kang