二元醇水溶液性质与喷射性能研究

摘要

The effects of two kinds of propylene glycols (1, 2-propanediol and 1, 3-propanediol) and three kinds of butanediols (1, 3-butanediol, 2, 3-butanediol and 1, 4-butanediol) with the same carbon chain and different hydroxyl positions on the moisture retention, viscosity, dynamic surface tension and spray properties of aqueous solutions were studied.The experimental results show that the moisture retention of divalent alcohols containing the same carbon chain with more hydrophilicity is poor, the aqueous solution of each glycol increases with the increase of the concentration of glycol, the surface tension gradually decreases.The secondary hydroxyl groups are easier to twist the molecules when the molecules slip, which is reflected by the viscosity of the solution.The alcohol molecules containing-CH (3) groups are relatively hydrophobic, so that the alcohol molecules are more arranged at the gas-liquid interface, which is characterized by lower surface tension of the solution.At the high-frequency, when the viscosity of the solution is close, the solution having a large surface tension easily leaves the nozzle.The initial velocity of the tail of the droplet is large, and a good droplet form is easily obtained.%研究了具有相同碳链不同羟基位置的两种丙二醇 (1, 2-丙二醇和1, 3-丙二醇) 和三种丁二醇 (1, 3-丁二醇、2, 3-丁二醇和1, 4-丁二醇) 对其水溶液保湿性、粘度、动态表面张力和喷射性能的影响.实验结果表明, 相同碳链的二元醇中含伯羟基多的二元醇保湿性较差;每种二元醇水溶液随着二元醇浓度增加, 粘度逐渐增加, 表面张力逐渐降低, 仲羟基在分子发生相对滑动时更容易使分子缠绕, 体现为溶液的粘度大, 含-CH3基团的醇分子疏水性相对较强, 使醇分子更多的在气液界面排列, 表现为溶液表面张力较低;高频喷射时, 溶液粘度接近时, 表面张力大的溶液在喷射时容易离开喷嘴, 液滴尾部获得初速度大, 容易获得良好的液滴形态.