The first successful attempt to synthesize a new proton conducting polymeric nanocomposite film based on pure cellulose nanofibers (CNF) as a polymer matrix functionalized on their surface with imidazole molecules (Im) as a dopant, was made. The 2CNF-Im nanomaterial contains on average one molecule of imidazole per 2 glucose units from cellulose chains. Water evaporation and thermal stability of 2CNF-Im were studied by thermogravimetric analysis (TGA and DTG) and differential scanning calorimetry (DSC). The temperature dependence of electrical conductivity was studied by the impedance spectroscopy. At 140 °C, the 2CNF-Im nanocomposite has a maximum conductivity of 7.0 × 10⁻³ S/m, i.e. four orders of magnitude higher than that of non-functionalized CNF matrix. The newly synthesized cellulose nanocomposite exhibits high electrical and thermal stability. In 2CNF-Im, the activation energy of the proton transport process is the lowest compared to the previously synthesized imidazole-functionalized composites based on other pure cellulose materials and equals 0.62 eV. The synthesized nanomaterial is liquid-free solid polymer electrolyte showing proton conductivity above the boiling point of water.

首次成功尝试合成一种新的质子传导聚合物纳米复合薄膜，该薄膜基于纯纤维素纳米纤维（CNF）作为在其表面上官能化了咪唑分子（Im）作为掺杂剂的聚合物基质。2CNF-Im纳米材料平均每2个来自纤维素链的葡萄糖单元包含一个咪唑分子。通过热重分析（TGA和DTG）和差示扫描量热法（DSC）研究了2CNF-Im的水分蒸发和热稳定性。通过阻抗谱研究了电导率的温度依赖性。在140°C下，2CNF-Im纳米复合材料的最大电导率为7.0×10 ^-3 S / m，即比未功能化的CNF矩阵高四个数量级。新合成的纤维素纳米复合材料显示出高的电稳定性和热稳定性。与以前合成的基于其他纯纤维素材料的咪唑官能化复合材料相比，在2CNF-Im中，质子传输过程的活化能最低，等于0.62 eV。合成的纳米材料是无液体的固体聚合物电解质，其质子传导率高于水的沸点。