Composite Track Membrane Produced by Roll Technology of Magnetron Sputtering of Titanium Nanolayer

Abstract

The possibility of obtaining a composite track membrane (TM) is investigated. The TM surface was modified by the method of planar magnetron deposition of titanium. The parameters of the magnetron installation operation, such as the deposition rate, the working pressure in the chamber and the magnetron current, have been optimized. The features of the structure and morphology of the 80 nm thick titanium layer have been studied using a combination of methods such as atomic force microscopy, scanning and transmission electron microscopy. X-ray photoelectron spectroscopy revealed that the titanium nanosheet has a complex composition including titanium, titanium oxide, titanium nitride and titanium carbide. The Scratch test showed high adhesion of Ti to TM, which is associated with the formation of an interfacial layer of titanium carbide. It is established that magnetron deposition of Ti does not worsen the operational parameters of TM and reduces the marginal angle of water wetting to a value of about 33° ± 2°. Study of survival and growth rate of fibroblasts of Chinese hamster (V79 line) on PET TM and PET TM with Ti, a slight decrease in the survival rate of fibroblasts on metallized membranes was shown. Titanium sputtering suppresses autofluorescence of the TM surface, which makes it possible to use PET TM with Ti as a substrate for microscopic examination of fluorescent biological objects both in vivo and in vitro. The resulting PET TM with Ti can be used as the basis of skin prostheses and membrane-sorption materials of a new generation. The conducted studies show that magnetron sputtering is a promising approach to the manufacture of metal polymer membrane material.