论文标题
表征水微动物在油中的溶解
Characterization of the dissolution of water microdroplets in oil
论文作者
论文摘要
油乳液中的水具有从化学技术到微流体学的广泛应用，水滴的稳定性至关重要。在这里，我们使用可访问且易于重现的实验设置来描述并表征水在油中的溶解，从而使纳米尺寸的液滴变得不稳定，从而导致它们在小时的时间范围内收缩和消失。该过程在创建微型反应器以进行结晶方面具有适用性。我们测试多种油及其与表面活性剂的组合，其溶解速率差异很大。我们得出了简单的分析方程，以确定从测量的溶解数据中确定油中水的扩散系数和水的相对饱和密度。通过在用水饱和之前和之后，通过用Karl Fischer滴定测量矿物质和硅油的水分含量，我们计算了这两种油中水的扩散系数
Water in oil emulsions have a wide range of applications from chemical technology to microfluidics, where the stability of water droplets is of paramount importance. Here using an accessible and easily reproducible experimental setup we describe and characterize the dissolution of water in oil, which renders nanoliter-sized droplets unstable, resulting in their shrinkage and disappearance in a time scale of hours. This process has applicability in creating miniature reactors for crystallization. We test multiple oils and their combinations with surfactants exhibiting widely different rates of dissolution. We derived simple analytical equations to determine the product of the diffusion coefficient and the relative saturation density of water in oil from the measured dissolution data. By measuring the moisture content of mineral and silicone oils with Karl Fischer titration before and after saturating them with water, we calculated the diffusion coefficient of water in these two oils
