Abstract

Carbon nanotubes (CNTs) were covalently functionalized by a four components polysilicone (PMDA) to obtain novel, flame-retardant, polysilicone-functionalized carbon nanotubes (CNTs-PMDA). The chemical structure and thermal stability of the CNTs-PMDA were characterized and measured. Then, epoxy resin (EP)/CNTs-PMDA and EP/CNTs nanocomposites were prepared by a solution method, and thermogravimetric analysis (TGA), scanning electron microscopy (SEM), and cone calorimetry were used to evaluate the thermal stability, dispersion state, and flame retardancy of the nanocomposites, respectively. The results showed that the thermal stability of the EP/CNTs-PMDA was better than that of the EP/CNTs, with a higher char yield, and the CNTs-PMDA were dispersed well in the EP matrix. Furthermore, the CNTs-PMDA could improve the flame retardancy of the EP nanocomposites with 2 wt% loading due to the synergistic flame-retardant effect between the PMDA and CNTs, having better flame retardancy than either one alone.

摘要

通过四组分聚硅氧烷（PMDA）将碳纳米管（CNT）共价官能化，从而获得新型的，阻燃的，聚硅氧烷官能化的碳纳米管（CNTs-PMDA）。表征并测量了碳纳米管-PMDA的化学结构和热稳定性。然后，通过溶液法制备环氧树脂（EP）/ CNTs-PMDA和EP / CNTs纳米复合材料，并使用热重分析（TGA），扫描电子显微镜（SEM）和锥形量热法评估热稳定性，分散状态，和纳米复合材料的阻燃性。结果表明，EP / CNTs-PMDA的热稳定性优于EP / CNTs，具有较高的炭收率，且CNTs-PMDA分散在EP基体中。此外，