This study investigates the physicochemical transformations induced by the addition of glucose to cellulose derivatives

fi lms. The Gurley permeability tests, Fourier Transform Infrared Spectroscopy (FT-IR), and Thermogravimetric Analysis

(TGA) were employed to explore these changes in depth. The addition of glucose signifi cantly altered the pore structure and

thermal properties of the cellulose derivatives fi lms, leading to an increase in pore size and alteration in the thermal stability

of the fi lms. Gurley permeability tests showed a dramatic increase in air permeability following phase separation, suggesting

an enhancement in ionic conductivity crucial for battery performance. SEM analysis confi rmed the formation of larger

and more regularly arranged pores as glucose content increased, indicating a signifi cant increase in the free volume within

the polymer matrix due to the stereochemistry of glucose. FT-IR analysis revealed shifts in absorption peaks post-glucose

addition, suggesting changes in the bond strength of functional groups. These spectral shifts were particularly pronounced

in membranes with higher glucose content, indicating alterations in chemical interactions and polymer structure. TGA and

DTG analyses demonstrated that the addition of glucose and subsequent phase separation processes improved the thermal

stability of the membranes despite higher porosity, which typically lowers thermal stability.