- Discussion on the characteristics and influence factors of hydrophobic force
- 兰州交通大学环境与市政工程学院, 兰州 730070
- Abstract：Hydrophobic flocculation is a common process which occurs in natural water and one of the mechanisms which are employed in water treatment. The hydrophobic force is the most important mechanism which induces the hydrophobic flocculation and is of important scientific significance and great application value. Since more than 30 years ago, many scientists have made the great efforts in the research on hydrophobic force by experimental measurements, numerical simulations and theoretical analyses, which have led a better understanding of hydrophobic force, but the theory about hydrophobic force has still not been satisfactory for today because of its complexity and the difficulties in research method. In order to promote this research further, this article reviews some characteristics and influence factors of hydrophobic forces which were reported in the past literatures, for example, the experimental laws of hydrophobic force, the effect distance-range of hydrophobic force, the particle size-limit for hydrophobic force,the effect of contact angle on hydrophobic force, the effect of electrolyte on hydrophobic force and the effect of temperature on hydrophobic force et al. According to the analysis and the summarization of available literatures, the experimental law is of single exponential, double exponential and power functions respectively, the effect distance-ranges are divided into a short range one and a long range one, hydrophobic interaction takes place only when the radii of hydrophobic particles are greater than the critical radius, hydrophobic force increases with the increase in contact angle, electrolyte has nearly no influence on hydrophobic force, in addition, there have been still a lots of different viewpoints on the temperature dependence of hydrophobic force for today, which need further research very much.