This work suggests a method for obtaining heat-resistant protective coatings for 08Kh17T stainless steel that can be used as interconnect material for solid oxide fuel cells. The suggested approach is based on the layer-by-layer precipitation of nickel, cobalt, and manganese, followed by heat treatment in a vacuum and oxidizing atmosphere. XRD results show that the coatings consist of a mixture of metal oxides and compounds with a spinel structure. The obtained coatings demonstrate high resistance to high-temperature oxidation for 100 h. The coating with the ratio of the thicknesses of the cobalt and manganese layers of 1.5/0.5 μm obtained by electrodeposition is the most stable. The specific electrical resistance of this coating is 3.50·10⁻³ Ω·cm² after 100 h of exposure at 850 °C, which meets the requirements for SOFC interconnect materials.

Poly (vinylidene fluoride) membranes were prepared by freeze-casting. The effects of PVDF concentration, and freezing temperature on the morphology, crystallization, and performance of prepared membranes were examined. Polymer concentration was varied from 10 to 25 wt%. The freezing temperature was varied from −5 to −25 °C. Dimethyl sulfoxide (DMSO) and distilled water were used as solvents and non-solvents, respectively. The first step of this study was devoted to estimating the optimal concentration of PVDF solution in DMSO. Membranes prepared at different ratios were characterized using physical and mechanical characteristics and porosity. The second step was to optimize the time required for the production of the membranes. In the third step, it was shown that the freezing temperature had a remarkable effect on the morphology of the membranes: as the temperature decreases, there is a transition from spherulite structures to interconnected pores. It was shown that the diversity in the pore pattern for PVDF affects remarkably the water permeability through the polymer membrane. During the monitoring of the spread of crystallized areas during the formation of the membrane, it was found that the crystallization of the solvent begins at localized points of the microscale, further crystallized areas spread radially or unevenly along the surface of the solution, forming contact borders, which can lead to changes in the properties of the membrane in its area.

Membrane technology is a crucial tool toward technological process intensification in chemical industry. In addition to its undeniable contribution to desalination and reuse of water, the spread of separation applications in industry could save great part of the energy. Beyond the contribution to the environmental and economic improvement of separation processes, the membrane manufacturing industry itself needs to minimize environmental and occupational risks, that means meet principles of "green" chemistry. Membrane manufacturing should be developed with the reduction or elimination of hazardous compounds. The chemical processes of membrane production are linked with the use of a wide range of solvents. A lot of organic solvents required for membrane production are classified as toxic or hazardous substances and their use is strictly limited by law. One of the promising environmentally friendly methods of production of membranes is the applying of "green" solvents. As an alternative technology, it is proposed to use the freeze method, in which non-toxic dimethyl sulfoxide (DMSO) is used as a solvent. This technology requires less energy consumption, which also allows implementing the principles of "green" chemistry. Microporous membranes based on poly(vinylidene fluoride) (PVDF) with a thickness of 100 to 250 mu m was carried out by freeze method. Dimethylsulfoxide (DMSO) was selected as the most environmentally friendly solvent for some fluoropolymers. Porosity, permeability, wettability, physical and mechanical characteristics for obtained membranes and their morphology were investigated. It has been found that the most optimal concentration of PVDF in the solution is 30 wt.%. In this case the best combination of technological and operational properties is provided. The efficiency of prepared membranes for microfiltration process was demonstrated by a suspension of the yeast Saccharomyces cerevisiae. Such technology in comparison with the existing ones, is devoid of some disadvantages like using of complex equipment and high operating temperature. Freeze method does not require high energy consumption and using of toxic solvents.