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接触角是指固液界面经过液体内部到气液界面的夹角.如下图.它表示了固液间润湿性能.对表面活性剂润湿固体(如洗涤剂)有非常重要的指导作用和价值,同时也是表面张力测定的基础.表面接触角测量方法很多.如角度法,长度法,重量法,并已有专门测量仪器。但在实验室条件较差,资金缺乏的情况下,快速、准确测量接触角较为困难.本文据此建立了简易测量接触角的仪器。
The contact angle refers to the angle between the liquid-solid interface and the gas-liquid interface as shown in the following figure, which shows the wetting property between solid and liquid. It has a very important guiding role for surfactant wetting solid (such as detergent) and Value, but also the basis for the determination of surface tension.Measurement methods of surface contact angle are many, such as angle method, length method, gravimetric method, and have special measuring instruments. However, under the conditions of poor laboratory conditions and lack of funds, it is very difficult to measure the contact angle rapidly and accurately.This paper established a simple instrument for measuring the contact angle.