Improving the operational reliability of membranes and bellows with fluorinated surfactants

¹ Limited Liability Company "Center for diagnostics, expertise and certification", Saint-Petersburg, Russia
² Baltic State Technical University "VOENMEH" named after D.F. Ustinov, Saint-Petersburg, Russia
³ Kazan Federal University, Kazan, Russia

^* Corresponding author: evg.amirkhanov@gmail.com

Abstract

One of the characteristic properties of organofluorine compounds is their low surface energy. In this regard, surfactants containing perfluoroalkyl groups, as a rule, are much more effective than their nonfluorinated analogues. The unique character of fluorinated surfactants is also determined by their pronounced oleophobic properties. Surfaces treated with fluorinated surfactants are not only water-repellent, as in the case of their hydrocarbon analogues, but also benzo- and oil-repellent. Fluorotensides are highly resistant to oxidants and aggressive substances (acids, alkalis, chlorine, etc.). They also have high temperature resistance, withstand oxygen shock, have a solidification temperature of up to -160 °C, do not change properties at a dose rate of up to 108 rad. The applications of surfactants are extremely diverse. One of the methods of increasing the wear resistance of friction pairs is the method of surface treatment of friction pairs with fluorotensides. Fluorotensides are multicomponent systems that include organofluorine surfactants in various solvents and regulatory additives. In Russia, brands of fluorotensides have been created that surpass foreign samples in many respects, which has significantly expanded the scope of their application.