Shchutska G. The development of scientific bases of creation of medical devices with desired moisture transfer characteristics

The thesis for obtaining the degree of Doctor of Science by specialty: 05.02.01 – material science. - Kyiv National University of Technologies and Design, Kyiv, 2018. Dissertation is attributed to the development of methods predicted by the authorities, the responsibility of discrete and continuous signs, and can be attributed to the process of projecting and exploiting. The paper analyzes the existing normative base for determining the characteristics of moisture transfer in discrete environments and improves the matrix methods of forming a system of regulatory support. The rational conditions for the use of the continuum methods for modeling heat and mass transfer processes in materials are determined. Express-methods for determination of materials constants are substantiated. Adequate mathematical methods for analyzing the processes of moisture transfer in multilayer materials are determined. On the basis of these models, the processes of moisture spreading over the material plane and absorption processes of the thickness, taking into account the propagation of the liquid are generalized. Defined effects that occur during these processes. Generalized discrete models using three-dimensional anisotropic materials. The mutual influence of directions of anisotropy on the general transfer process is determined. Methods of modeling of multilayer materials with the use of discrete spatial models have been refined. Recommendations for planning of moisture transfer processes in packages of materials of medical products are developed. The rational dynamical processes with the optimal cycle are determined. Keywords: moisture transfer, discrete model, continuum model, rapid methods, diffusion, mathematical model, medical appointment.