最大气泡压力法测液体表面张力系数的改进

Research on the maximum bubble pressure method to measure the liquid surface tension coefficient

对最大气泡压力法测定液体表面张力系数的实验原理、方法及仪器进行了研究,提出用螺旋活塞定量加压控制气泡的生成速度;用扩散硅气体压力传感器测量压强,测得值数字显示;用双毛细管制作实验探头,消除了毛细管插入液体一定深度产生的静压强及待测液体密度等对计算液体表面张力系数的影响,提高了液体表面张力系数的测量速度和精度.

In this paper, the experimental principle, the methods and the instrument are studied to measure the liquid surface tension coefficient with the maximum bubble pressure method. A new method that controls the air bubble production speed with the screw tap quota is proposed, the pressure is measured with the proliferation silicon gas pressure sensor, and the recorded data are displayed visually. Double capillaries are made and used as probes. The influences of the density and the static pressure of the liquid are eliminated, and the speed and precision are improved.