论文标题
在SARS-COV-2的背景下，无柄唾液液滴的寿命
Lifetime of sessile saliva droplets in the context of SARS-CoV-2
论文作者
论文摘要
呼吸道疾病（例如Covid-19）从受污染的表面传播取决于含有病毒的沉积液滴的干燥时间。蒸发速率取决于环境条件，例如环境温度以及相对湿度和物理特性（例如，液滴体积，接触角和组成）。除水外，呼吸液滴含有盐（NaCl），蛋白质（粘蛋白）和表面活性剂（二氨甲酰磷脂酰胆碱），除了水外，预计会大大影响蒸发。开发了一种基于扩散的理论模型，用于估计干燥时间，该模型考虑了带有盐和不溶性表面活性剂的唾液液滴的动态接触角。研究了初始体积，接触角，盐度，表面活性剂浓度，环境温度和相对湿度对液滴干燥时间的影响。
Spreading of respiratory diseases, such as COVID-19, from contaminated surfaces is dependent on the drying time of the deposited droplets containing the virus. The evaporation rate depends on environmental conditions, such as ambient temperature and relative humidity and physical properties (e.g., droplet volume, contact angle and composition). The respiratory droplets contain salt (NaCl), protein (mucin), and surfactant (dipalmitoylphosphatidylcholine) in addition to water, which are expected to influence the evaporation in a big way. A diffusion-based theoretical model for estimating the drying time is developed which takes into account the dynamic contact angle of saliva droplets laden with salt and insoluble surfactants. The effect of the initial volume, contact angle, salinity, surfactant concentration, ambient temperature and relative humidity on the drying time of droplets is investigated.
