Abstract
In this study, alkali cellulose‐6‐phosphate (A‐CP) was prepared by the treatment of cellulose‐6‐phosphate (CP) with an aqueous solution of sodium hydroxide. X‐ray diffraction and Fourier transform infrared, 13C NMR, 31P NMR and 23Na NMR spectroscopies were used to characterize the studied polymers. CP and A‐CP crystallize in the monoclinic system of the P21 space group (cellulose Iβ). CP and A‐CP, with relative densities of 70% and 77%, respectively, were shaped into cylindrical pellets by uniaxial pressing and sintering at 423 K of A‐CP. Electrical conductivity measurements of CP and A‐CP were carried out using complex impedance spectroscopy between 298 and 433 K in the frequency range 5 Hz to 13 MHz. The influence of aqueous NaOH on the structure, thermal stability and electrical conductivity of cellulose phosphate was observed. In contrast to CP, A‐CP was stable up to temperatures exceeding 433 K and showed fast ionic conductivity σ393K = 2.03 × 10−6 S cm−1 with an activation energy of 0.73 eV. © 2021 Society of Chemical Industry
Mercerization effects on microstructure and electrical properties of cellulose phosphate