煤与纯水间平衡接触角的测量与分析

THE MEASUREMENT AND ANALYSIS OF THE BALANCED CONTACT ANGLE BETWEEN COAL AND PURE WATER

接触角对于研究固体的润湿性、液体在固体孔隙中的渗透性有重要意义，但接触角的测量难度比较大。笔者用快速照相法测定了来自我国七个不同矿区的煤的粉煤成形体压光表面与纯水间的平衡接触角，并分析了接触角的影响因素，初步得到了规律性认识。

The contact angle between liquid and the surface of solid is very important for the research of the wetability of solid, permeability of liquid in the pores of solid,etc. But it is difficult for the contact angle to be measured. In this paper, the balanced contact angle between pure water and the smooth coal surface,which is made by very fine particles of coal under high presure,is measured by the author by means of rapidly-photographing,and the affacting factors to the contact angle are researched,the results give some important tendency on the contact angle between water and coal,which is from seven main coal mines of China.