The purpose of the present invention is to provide a metallic copper dispersion: capable of maintaining dispersion stability of metallic copper particles for a long period of time; suitable for inkjet printing, spray coating, or the like; and capable of allowing a metallic copper-containing film having an excellent electrical conductivity and metallic color tone to be manufactured in a simple manner by performing low-temperature heating or plasma irradiation after application. The metallic copper dispersion is a dispersion containing at least an organic solvent, a polymer dispersant, and metallic copper particles having gelatin on the particle surface, wherein the metallic copper particles in the dispersion have a cumulative 50% particle size (D50) of 1-130 nm and a cumulative 90% particle size (D90) of 10-300 nm, and the polymer dispersant has an amine number of 10-150 mgKOH/g. The metallic copper dispersion is manufactured by reducing copper oxide in an aqueous solvent in the presence of gelatin, then performing solid-liquid separation, and then mixing the obtained metallic copper particles having gelatin on the particle surface and the polymer dispersant into the organic solvent.
本发明的目的是提供一种
金属
铜分散液:能够长期保持
金属
铜颗粒的分散稳定性;适用于喷墨打印、喷涂或类似用途;能够在应用后通过低温加热或等离子辐照,以简单的方式制造出具有优异导电性和
金属色调的含
金属
铜薄膜。
金属
铜分散液是一种分散液,至少含有一种有机溶剂、一种聚合物分散剂和颗粒表面具有明胶的
金属
铜颗粒,其中分散液中的
金属
铜颗粒的累积 50%粒径(D50)为 1-130 nm,累积 90%粒径(D90)为 10-300 nm,聚合物分散剂的胺数为 10-150 mgKOH/g。
金属
铜分散液的制造方法是:在明胶存在的情况下,在
水性溶剂中还原
氧化铜,然后进行固液分离,再将得到的颗粒表面有明胶的
金属
铜颗粒和聚合物分散剂混合到有机溶剂中。