Cluster Diffusion in Metastable Solutions; Ninth International Conference on Crystal Growth (ICCG-9) held August, 1989, in Sendia, Japan (Supplement)

过饱和时扩散系数的快速下降 的解决方案进行检查的分子簇的形成。 初步的实验工作表明， 亚稳过饱和溶液随“年龄”的变化， 溶液 在这项工作中，研究人员实验性地检查了 固体过饱和溶液的扩散系数 非电解质和溶剂作为溶液“历史”的函数， “年龄。and The results showed that the results of this method were significantly different.“ 基于集群演化和集群理论的预测 亚稳溶液中的扩散 低分子量（非聚合物）溶液的输运性质 通常被认为是变量的函数，例如 浓度和温度。 通常，温度的“历史”， 物理处理或溶液的“老化”还没有被认为 影响这种溶液的性质。 亚稳溶液， 然而，呈现出“历史”和“时代”可以 用于改变溶液的性质，例如扩散 系数 理解“历史”和“时代”对集群的作用 形成和扩散系数可以导致创新 结晶器设计和创新分离方法 技术.

The rapid decline of diffusion coefficients in supersaturated solutions is examined in terms of the formation of molecular clusters. Preliminary experimental work has shown that diffusion coefficients in metastable supersaturated solutions vary with the "age" of the solution. In this work, the investigators experimentally examine the diffusion coefficients of supersaturated solutions made from solid nonelectrolyte and solvent as a function of solution "history" and "age." The experimental results is compared to theoretical predictions based on theories of cluster evolution and cluster diffusion in metastable solutions. Transport properties of low molecular weight (non-polymer) solutions are usually considered to be functions of variables such as concentration and temperature. Normally, the temperature "history", physical treatment, or "age" of a solution have not been thought to affect the properties of such a solution. Metastable solutions, however, present the novel situation where "history" and "age" could be used to alter properties of a solution such as the diffusion coefficient. Understanding the role of "history" and "age" on cluster formation and the diffusion coefficient could lead to innovative methods for crystallizer design and innovative new separation techniques.