O. Belukhina “Modification of industrial textile fiber waste with copper selenides for obtaining new functional materials” doctoral dissertation defense

Author, Institution: Olga Belukhina, Kaunas University of Technology

Science area, field of science: Technological Sciences, Materials Engineering, T008

Scientific Supervisor: Dr. Daiva Milašienė (Kaunas University of Technology, Technological Sciences, Materials Engineering, T008)

Scientific Advisor: Assoc. Prof. Dr. Remigijus Ivanauskas (Kaunas University of Technology, Natural Sciences, Chemistry, N003)

Dissertation Defence Board of Materials Engineering Science Field:
Prof. Dr. Daiva Mikučionienė (Kaunas University of Technology, Technological Sciences, Materials Engineering, T008) – chairperson
Prof. Dr. Saulius Grigalevičius (Kaunas University of Technology, Technological Sciences, Materials Engineering, T008)
Prof. Dr. Hab. Audrius Sigitas Maruška (Vytautas Magnus University, Technological Sciences, Materials Engineering, T008)
Prof. Dr. Remo Merijs-Meri (Riga University of Technology, Latvia, Technological Sciences, Materials Engineering, T008)
Assoc. Prof. Dr. Kristina Žukienė (Kaunas University of Technology, Technological Sciences, Materials Engineering, T008)

Dissertation defence meeting will be at M7 Hall at The Campus Library of Kaunas University of Technology (Studentų 48–M7, Kaunas)

The doctoral dissertation is available at the library of Kaunas University of Technology (K. Donelaičio g. 20, Kaunas)

Annotation: The thesis analyzes the work of researchers from different countries, which shows an intensive search for new possibilities for recycling and reuse of textile waste; therefore, this thesis presents research relevant in this context, aiming to give new functional properties to waste fibres of different nature and nonwovens with the fibres textile waste of unknown exact fibre composition by chemical modification. The rapid pace of technological development in recent decades has led to a rapid increase in the number of different electrical devices, which has recently led to a fundamental change in the extent of electromagnetic radiation in the human body. The relevance of this problem is reflected in a large number of published scientific papers exploring the development of new materials that partially or fully suppress the effects of electromagnetic fields. Copper selenide is a p-type semiconductor material. The deposition of copper selenide films on glass surfaces has been extensively studied. A literature review did not find any work on coating textile materials with copper selenide; therefore, in this work, investigations have been carried out to modify waste textile fibres of different natures and nonwovens with the textile waste of different compositions with copper selenides. In this thesis, nine fibres of different natures and seven nonwovens of different fibre compositions with textile waste have been modified with copper selenides by the cyclic sorption-diffusion method under selected uniform conditions, coating the surface of the structural elements of these materials with Cu_xSe crystals over the entire volume of the material.