Influence of Surfactants on Contact Angle and Flotation Separation of Polybutylene Terephthalate and Acrylonitril Butadiene Styrene
摘要
A technique has been proposed for measuring the contact angle of plastics, which makes it possible to determine the degree of wettability of their surface, on the basis of which assumptions can be made about the applicability of surfactants as wetting agents in the process of flotation separation of a mixture of plastics. The effect of aqueous solutions of surfactants on the contact angle and efficiency of flotation separation of a mixture of polybutelene terephthalate and acrylonitrile butadiene styrene was studied. The wettability of the surface of these plastics with aqueous solutions of sodium laureth-3 sulfosuccinate, sodium lauryl sarcosinate, polysorbate 80, and C8-C14 alkyl polyglucoside with a concentration of 2∙10–3–0.01 g/dm3 was determined. It has been found that the wettability of the surface of plastics with aqueous solutions of surfactants and the efficiency of floation separation of a mixture of plastics depend on the type of surfactants and their concentration in the aqueous solution.