silicone-polyether copolymers as new steam turbine oil demulsifiers

Turbine oil plays an important role in supporting optimal steam turbine performance. some additives inturbine oil can cause emulsification when the oil is contaminated by water, so demulsibility is a veryimportant property of the steam turbine oil. in order to improve the demulsibility of steam turbine oil, twokinds of polyether‐silicone comb copolymers are synthesized and used as steam turbine oil demulsifiers.the polyether‐silicone copolymers present better demulsibility properties than the demulsifiers on themarket at the present time. the influences of demulsifiers on turbine oil‐water interfacial tensionand demulsibility time were measured. all the demulsifiers obviously decrease interfacial tensionand simultaneously reduced the demulsibility time. the variation tendency of interfacial tensionand demulsibility time is basically consistent. the oil‐water interfacial elastic modulus and viscous moduluswere also measured as a function of strain and frequency respectively. the results showed that thedemulsifiers decrease the oil‐water interfacial elastic modulus, which was favorable to the demulsification.