Shulga Y. Increasing the operational and repair characteristics of water transport means by using anticorrosive environmentally friendly composites

The dissertation is devoted to solving a scientific and technical problem, which is to improve the operational and repair characteristics of water transport means by using an anticorrosive environmentally friendly composite. Also, the solution of the scientific and technical problem is to establish the regularities of the predicted effect of physically active ingredients on the phenomena of interfacial interaction in the formation of a modified anticorrosive composite to improve the reliability of equipment functioning, operation and repair of marine transport, which is a key scientific problem of the world level, including an important issue of Ukraine's defence capability. The relevance of the work is due to the development of transport technologies and the transport industry as a whole, which requires the development and implementation of new structural materials (SM). The applications of polymeric SMs, particularly in the repair and restoration of waterborne vessels, are constantly expanding. At the same time, thermosetting polymers based on epoxy resins are being used with high efficiency due to the improved physical and mechanical properties of the SM. The properties of cementitious materials are regulated by the chemical nature of the constituents and the technological modes of the curing reaction. In this context, it is interesting to use chemically active modifiers, synthesised micro-additives and discrete fibres in the complex. In our opinion, such elements will provide a change in the structural network of the polymer at different levels and stages of its formation, which will improve the operational and repair properties of materials for water transport vehicles operating under the influence of aggressive environments. The aim of the work is to improve the operational and repair characteristics of water transport vessels by using an environmentally friendly anti-corrosive composite with established patterns of predicted effects of physically active ingredients on the phenomena of interfacial interaction and properties of the reactant. To achieve this goal, it was necessary to solve the following scientific and practical problems: 1. To develop a modified epoxy matrix with improved adhesive and cohesive properties for the formation of anticorrosive protective coatings. 2. To investigate the effect of synthesised microdispersed fillers on the properties of composite materials and to study the physicochemical interaction at the polymer matrix-dispersed additive interface. 3. To substantiate the mechanism of activation of interfacial interaction during crosslinking of materials in the presence of a dispersed filler. To develop a model of the formation of structural levels during the formation of epoxy composites in the presence of a dispersed additive and to substantiate their influence on the properties of materials for water transport. 4. To develop a mathematical model to optimise the content of components in the formation of protective coatings for the restoration of water transport. 5. To substantiate the feasibility of using discrete fibres due to the establishment of regularities in the course of structure formation processes in heterogeneous systems that determine the cohesive strength of epoxy composites and protective coatings based on them. 6. To investigate the anticorrosive properties of the developed composites under the influence of various aggressive environments. To investigate the biological resistance of the developed materials to well-known fungi. 7. To provide recommendations for improving the environmental friendliness and service life of water transport vessels by using epoxy composite protective coatings for anticorrosive purposes.