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 I_β). 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 σ_393K = 2.03 × 10⁻⁶ S cm⁻¹ with an activation energy of 0.73 eV. © 2021 Society of Chemical Industry

中文翻译：

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6-磷酸纤维素的结构、热稳定性和电性能：新型快钠离子导体的开发

在本研究中，通过用氢氧化钠水溶液处理 6-磷酸纤维素 (CP) 制备碱性 6-磷酸纤维素 (A-CP)。X 射线衍射和傅里叶变换红外光谱、¹³ C NMR、³¹ P NMR 和²³ Na NMR 光谱用于表征所研究的聚合物。CP 和 A-CP 在 P ₂₁空间群的单斜晶系中结晶（纤维素 I _β）。CP 和 A-CP 的相对密度分别为 70% 和 77%，通过单轴压制和在 423 K 的 A-CP 下烧结成型为圆柱形颗粒。CP 和 A-CP 的电导率测量是在 5 Hz 至 13 MHz 的频率范围内使用 298 至 433 K 之间的复阻抗谱进行的。观察了NaOH水溶液对磷酸纤维素的结构、热稳定性和电导率的影响。与CP相反，A-CP在超过433 K的温度下是稳定的，并且显示出快速的离子电导率σ _393K  = 2.03 × 10 ^-6  S cm ^-1，活化能为0.73 eV。© 2021 化学工业协会