We report a two-step process for the continuous production of monodisperse polystyrene colloidal ellipsoids of aspect ratios up to 6.8 at rates that exceed 1.0 g per day, an improvement on previously reported synthetic batch processing rates of nearly a factor of 20. This scale up is accomplished by continuous evaporative processing of a polymer solution into an elastomeric film embedded with colloidal spheres. Subsequently, the film is continuously elongated at a temperature that stretches the embedded spheres into ellipsoids. The method is used to deform initially 1.0 μm diameter spheres into ellipsoids of aspect ratio 1.27 ± 0.15, 3.31 ± 0.44, 3.91 ± 0.72, 4.14 ± 0.47, and 6.77 ± 1.01. The particle production rate reported here opens new possibilities for applications of monodisperse ellipsoids, such as self-assembly and optical characterization of complex crystalline unit cells, as well as rheological characterization of dilute gels and dense suspensions. © 2017 American Institute of Chemical Engineers AIChE J, 2017

中文翻译：

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两步连续生产单分散胶体椭球体，每天产量为一克

我们报告了分步进行的两步过程，该过程以每天超过1.0 g的速率连续生产长宽比高达6.8的单分散聚苯乙烯胶体椭球，比以前报道的合成批处理速率提高了近20倍。通过将聚合物溶液连续蒸发加工成包埋有胶体球的弹性体薄膜来完成。随后，在将嵌入的球拉伸成椭圆形的温度下，将薄膜连续拉长。该方法最初用于将直径为1.0μm的球体变形为长宽比为1.27±0.15、3.31±0.44、3.91±0.72、4.14±0.47和6.77±1.01的椭圆体。此处报道的颗粒生产率为单分散椭球的应用开辟了新的可能性，例如复杂晶体晶胞的自组装和光学表征，以及稀凝胶和致密悬浮液的流变学表征。©2017美国化学工程师学会AIChE的Ĵ，2017年