JANEK, Jakub: Nanoparticle-based wood flame retardants (Diploma thesis), Technical University in Zvolen, Faculty of Wood Sciences and Technology, Department of Chemistry and Chemical Technologies. Supervisor Ing. Tatiana Bubeníková, PhD., Zvolen 2020.The diploma thesis deals in the introductory part with the characteristics of wood, its composition, physical, chemical and fire technical properties. Next, it analyses nanomaterials that occur in fire protection and, last but not least, describes flame retardants, their functionality, distribution and types of application. The aim of the diploma thesis is to characterize the impact of selected nanoparticles on the retardation efficiency and change of thermal resistance of wood, to create a literature search on fire-technical properties of wood, nanomaterials and flame retardants and to evaluate the contribution of TiO2 to fire protection of wood. In the practical part we deal with the evaluation of the properties of TiO2 nanoparticles and a commercial retarder as well as their tests and application to materials. After getting acquainted with the substances, we compared foreign researches that dealt with the use of TiO2 nanoparticles. The results show that these nanoparticles improve the fire resistance of wooden materials, especially against ignition where the ignition temperature increased by 5 to 10 ° C. They also help to limit the spread of the flame where the difference compared to the sample on which the TiO2 nanoparticles were not applied is up to 48.5% smaller than the burned area of the sample. Another important result is that the formation of smoke after the use of nanoparticles was reduced by up to 87%. From these findings, we can recommend TiO2 nanoparticles for further testing in fire protection.