用于电子墨水的纳米炭黑颗粒表面电荷改性

摘要

采用硅烷偶联剂KH550和浓硫酸分别对色素炭黑纳米颗粒进行了表面处理。透射电子显微镜、紫外-可见分光光度计分析表明改性前后炭黑纳米颗粒的粒径和色纯度变化非常小。炭黑电泳显示实验表明原本导电的色素炭黑经过处理后均具有较高的介电性,表面分别带了正电荷和负电荷,在施加较低的电压下,改性纳米炭黑颗粒表现出了良好的电场响应和可逆移动特性。%The surfaces of nano carbon black particles were modified by silane coupling agent 3-triethoxysilylpropylamine（KH550） and concentrated sulfuric acid.Manifested by transmission electron microscope,ultraviolet-visible spectrophotometer UV4100,there were almost no changes in the size and color purity between the unmodified and modified carbon black particles;electrophoretic display（EPD） experiments of the modified nano carbon black particles show that the conductivities of carbon black whose surfaces were positively or negatively charged,have been converted to very low from high.The modified nano carbon black particles have good electric field response characteristics and reversible movement at low voltage.