Deposition of fluoropolymer coating on stainless steel surface from plasma of glow discharge

The present work investigates the application of the plasma of glow discharge to deposit the fluoropolymer coatings. Two series of experiments were carried out in which the influence of pressure and current strength on surface coatings morphology during its surface treatment with glow discharge plasma was investigated. The surface morphology is investigated by a scanning electron microscope (SEM), and the water contact angle (WCA) is measured. The fact that the choice of pressure significantly affects the morphology and properties of the deposited coating is established.

Осаждение фторполимерных покрытий на вращающиеся цилиндрические поверхности методом химического осаждения из газовой фазы, активированной горячей нитью

The Hot Wire Chemical Vapor Deposition method has been adapted to deposit fluoropolymer coatings onto rotating cylindrical surfaces with a small radius (less than 20 mm). The effect of the surface rotation frequency on the structure of a thin fluoropolymer coating deposited on it has been investigated. A significant change in the morphology of the formed fluoropolymer coating was found depending on the rotational frequency of the cylindrical surface. One more parameter has been established that makes it possible to change the structure of the formed fluoropolymer coating during the deposition process.

Slippery liquid infused fluoropolymer coating for central lines to reduce catheter associated clotting and infections

Thrombosis and infections are two grave, interrelated problems associated with the use of central venous catheters (CVL). Currently used antibiotic coated CVL has limited clinical success in resisting blood stream infection and may increase the risk of emerging antibiotic resistant strains. We report an antibiotic-free, fluoropolymer-immobilized, liquid perfluorocarbon-coated peripherally inserted central catheter (PICC) line and its effectiveness in reducing catheter associated thrombosis and pathogen colonization, as an alternative to antibiotic coated CVL. Commercially available polyurethane PICC catheter was modified by a three-step lamination process, with thin fluoropolymer layers to yield fluoropolymer–polyurethane–fluoropolymer composite structure before applying the liquid perfluorocarbon (LP). This high throughput process of modifying commercial PICC catheters with fluoropolymer is quicker, safer and shows higher thromboresistance than fluorinated, omniphobic catheter surfaces, produced by previously reported self-assembled monolayer deposition techniques. The LP immobilized on the fluoropolymer is highly durable in physiological flow conditions for over 60 days and continue to resist Staphylococcus colonization.