Literature review summarizes the information about integrated waste-free technologies, polymer nanocomposites and nanofiller effect on the material properties, nanocelullose extraction methods and integration in polymer nanocomposites. Particular attention focused on the ectrospinning process, the influencing factors and the impact on the nanofibre morphology and properties, as well as nanofibre fields of application. The methodological part of the PhD work includes the used methods in research process, technologies and testing methods, nanocelulose and polymer nanofibre producing technology, equipment, technological processes, as well as the research methods and determinable parameters. The experimental part of the work describes the impact of steam explosion process parameters on biomass, as well as impact of cellulose nanofiller on the spinning solution properties, nanofibre web morphology, and physical and mechanical properties. Experimental part specifies optimal electrospinning processing parameters such as process duration, temperature, polymer and cellulose nanofiller concentration. Overall, the novel cellulose nanofiller reinforced polymer nanofibre non-woven material with enhanced mechanical properties and moisture stability. The doctoral thesis is written in Latvian; consist of an introduction and 3 main chapters: review of the literature, methodological part, experimental part and conclusions. The amount of work contains 85 figures, 17 tables, 26 equations, together 144 pages; 351 references used in the work.