Fillers added to enhance the mechanical properties of solid polymer electrolytes (SPEs) should have excellent mechanical strength and good interfacial compatibility. Carbon nanotubes (CNTs) can meet these requirements because these not only have excellent mechanical strength but can also be functionalized to form chemical bonds with the host matrices. However, the two requirements are contradictory to each other; as the walls of CNTs are replaced with more functional groups to increase the number of chemical bonds, their mechanical strength decreases and vice versa. Thus, to maximize the advantages of CNTs, these should be functionalized at an appropriate level. Nevertheless, most studies have focused only on the functionalization of CNTs, and an increase in their interfacial compatibility. Herein, multi-walled carbon nanotubes (MWNTs) substituted with different concentrations of acid chloride were prepared and used as fillers for chitosan SPEs. Their mechanical properties were investigated to determine the optimum functionalization level of MWNTs, and their ionic conductivities were measured as a function of the glycerol (plasticizer) and lithium salt (dopant) amounts for potential applications in practical SPEs.

为提高固体聚合物电解质 (SPE) 的机械性能而添加的填料应具有优异的机械强度和良好的界面相容性。碳纳米管 (CNT) 可以满足这些要求，因为它们不仅具有出色的机械强度，而且还可以进行功能化以与主体基质形成化学键。然而，这两个要求是相互矛盾的；随着碳纳米管壁被更多的官能团取代以增加化学键的数量，它们的机械强度会降低，反之亦然。因此，为了最大限度地发挥碳纳米管的优势，这些碳纳米管应该在适当的水平上进行功能化。然而，大多数研究只关注碳纳米管的功能化，以及它们界面兼容性的增加。在此处，制备了用不同浓度的酰氯取代的多壁碳纳米管 (MWNT) 并将其用作壳聚糖 SPE 的填料。研究了它们的机械性能以确定 MWNT 的最佳功能化水平，并测量它们的离子电导率作为甘油（增塑剂）和锂盐（掺杂剂）量的函数，以用于实际 SPE 中的潜在应用。