Disperse dyes are poorly water‐soluble and difficult to stably disperse in an aqueous medium, which greatly limits their application in dyeing synthetic fibers. Micronization can solve this problem. Herein, a facile way to prepare stable aqueous nanodispersions of disperse dye (C.I. disperse yellow 54) is presented by combining high‐gravity antisolvent precipitation in a rotating packed bed (RPB) with spray drying. The as‐prepared product had an average particle size of 120 nm, which could be readily redispersed in water. Compared with raw dye, the wettability and dispersibility of disperse dye nanoparticles were remarkably improved. Furthermore, the dyeing properties of the nanodispersions were obviously better than those of the commercial dye, which was micronized by ball milling.

中文翻译：

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高重力技术和喷雾干燥法制备分散染料的水性纳米分散体

分散染料水溶性差，难以在水性介质中稳定分散，这极大地限制了它们在合成纤维染色中的应用。微粉化可以解决这个问题。本文提出了一种通过在旋转填充床（RPB）中进行高重力反溶剂沉淀与喷雾干燥相结合的方法来制备稳定的分散染料水性纳米分散体（CI分散黄54）的简便方法。所制备的产品的平均粒径为120 nm，可以很容易地重新分散在水中。与原染料相比，分散染料纳米粒子的润湿性和分散性明显提高。此外，纳米分散体的染色性能明显优于通过球磨法微粉化的市售染料。