Improvement of stability for cellulose polymer by calcium oxide for application to porous materials

Abstract

In this study, calcium oxide (CaO) was used as an additive to form pores in a cellulose acetate (CA) membrane and at the same time improve the thermal stability of the cellulose acetate membrane. When the CA/CaO membrane was exposed to water pressure, the solvent was removed from the CA matrix area plasticized by the CaO particle size 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 membrane synthesis with a high porosity of 73.1% and flux data of 95.25 L/m2h at 8 bar, which was enhanced thermally with an increased decomposition temperature of 50°C on thermogravimetric analysis (TGA). The pores generated in the cellulose acetate film were confirmed using a scanning electron microscope machine (SEM) and mercury porosimeter. Thermal stability and interactions in materials were measured using TGA and Fourier transform infrared (FT-IR).