Experiment Research on the Surface Tension and Contact Angle of Modified Camouflage Coating

摘要

In this experiment, nano-CaCO_3, nano-SiO_2, nano-TiO_2 and nano-ZnO were chosen and added into waterborne camouflage coating respectively to make nano-material camouflage coatings. Both the surface tension and the contact angle of the coating (on steel plate and on concrete blocks) were measured by the OCA 15+ video optics contact angle admeasuring apparatus;;the nano-material's influence on the interfacial properties of camouflage coating were studied based on its changing concentration. The experiment indicates that the relationship between the concentration of nano-material and the surface tension of the coating coincides with the Szyszkowski formula, but only when the concentration is relatively low;;nano-SiO_2 has the best effect in improving the interfacial properties of camouflage coatings. It also proves that adding proper nano-material is an efficient way to improve the coating's durability.