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设计制备了导电TiO2材料,使用硝酸溶液对其进行表面活性处理,使用表面处理以及未处理的导电TiO2与聚酰胺分别混合造粒,再经熔融纺丝制备纤维。测试表明未经处理的导电TiO2在基体中发生团聚,纤维不具有导电性能;经表面处理后可以很好的分散于基体中且与基体相容性良好,纤维具有良好的导电性能;导电TiO2在基体中分散好有利于共混物结晶。对其导电机理进行了研究,结果表明:当导电TiO2均匀分散于基体中形成三维点状网络结构时,隧道导电为主。
Conductive TiO2 materials were designed and prepared, surface-treated with nitric acid solution, surface-treated and untreated conductive TiO2 and polyamide were mixed and granulated, respectively, and then melt-spun to prepare fibers. The results show that the untreated conductive TiO2 agglomerates in the matrix, the fibers do not have conductive properties; the surface treatment can be well dispersed in the matrix and good compatibility with the matrix, the fibers have good electrical conductivity; conductive TiO2 The dispersion of the matrix is conducive to the crystallization of the blend. The conduction mechanism was studied. The results show that tunneling is dominant when the conductive TiO2 is uniformly dispersed in the matrix to form a three-dimensional dot-like network structure.