Abstract
In this study, calcium oxide (CaO) was used as an additive to form pores in a cellulose acetate (CA) and at the same time improve the thermal stability of the cellulose acetate. When the CA/CaO membrane was exposed to water pressure, the CA matrix area plasticized by the CaO particles became weakened and water channels were formed. In addition, the high melting point of CaO and its bonding with the carbonyl group of CA caused a crosslinking effect. We succeeded in manufacturing a porous separator with a high porosity of 73.1% and a high flux value of 92.25 L/m2 h at 8 bar. Furthermore, TGA measurements revealed an increase of thermal stability by 50 °C. The pores generated in the cellulose acetate film were confirmed using a SEM and mercury porosimeter. Thermal stability and interactions in materials were measured using TGA and FT-IR. By improving the thermal stability of inexpensive and eco-friendly cellulose acetate, the potential for commercialization of battery separators was proposed.
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