纳米Fe_3O_4的制备及在油墨中的应用研究

Research on the Preparation of Nano Fe_3O_4 and Its Application to Painting Ink

磁性防伪油墨是一种新型防伪技术,其防伪技术的核心是磁性材料。Fe_3O_4是目前最常使用的磁性材料。本文采用共沉淀法,利用硫酸亚铁为单一铁源,以醋酸钠作静电保护剂,在一定条件下成功制备了形貌基本均一、平均粒径为100nm的棒状Fe_3O_4。然后利用实验室自制的Fe_3O_4纳米材料作为磁性防伪材料和颜料,配以一定比例的连接料和助剂,制备出了磁性能良好防伪油墨,其细度均匀、墨色浓厚,流动性能良好,适于印刷。

Magnetic anti-counterfeiting ink is a new anti-counterfeiting technique, whose core is magnetic materials. Fe3O4 is the most commonly used magnetic material at present. Through co-precipitation method, with ferrous sulfate as the single source of iron and sodium acetate as the static protection agent, rod-like Fe3O4, with generally average appearance and an average diameter of 100 nm, is prepared under certain conditions. Then with laboratory made Fe3O4 nano material as the magnetic anti-counterfeiting material and pigment, supplemented by a certain proportion of binder and auxiliary, anti-counterfeiting painting ink with good magnetic property is prepared, and it is well suitable for printing with its average size, ink density and good flowability.