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Vyučující
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Ryšánek Petr, RNDr. Ph.D.
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Obsah předmětu
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Schema teoretické části kurzu: Úvod: Význam a využití nanovlákenných struktur; nanovlákenné materiály pro bioaplikace a nanovlákenné membrány pro specifické funkce. Princip elektrostatického zvláknění; Historie elektrostatického zvláknění od objevu principu elektrospinningu k nanospideru. Klíčové parametry zvlákňujícího procesu ? napětí, vzdálenost elektrod, uspořádání experimentu ? a jejich vliv na vlastnosti nanovlákenných membrán, jako morfologie, struktura a pevnost nanovláken a zejména vzdušná a kapalinová propustnost; vliv vlastností zvlákňujících roztoků Přehled technik pro elektrostatické zvláknění a jejich specifika (DC spinning). Netradiční postupy zvláknění s využitím střídavého proudu (AC spinning) Odstředivé zvláknění a jeho různé variace Importance and use of nanofibrous structures; Nanofibrous materials for bioapplications and nanofibrous membranes for specific functions. Principle of electrostatic spinning; History of electrostatic spinning from the discovery of the principle of electrospinning to Nanospider; Key parameters of the spinning process (voltage, electrode distance, experimental setup) and their influence on the properties of nanofibrous membranes, such as morphology, structure and strength of nanofibers and especially air and liquid permeability; influence of the properties of spinning solutions; Overview of techniques for electrostatic spinning and their specifics (DC spinning); Non-traditional spinning procedures using alternating current (AC spinning); Centrifugal spinning and its various variations; Functionalization of nanofibrous structures; Physical methods of functionalization (UV and plasma modifications); Chemical modification of nanofibrous membranes; Influence of additives on spinning; Specific functions of chemically modified nanofibrous membranes; Methods for characterizing nanofibrous structures: air and liquid permeability, XPS, SEM, XRD; Practical part of the course: Introduction to the apparatus for electrospinning, preparation of own samples, demonstration of the influence of technological parameters on spinning and properties of nanofibrous membranes. Characterization of air and liquid permeability of membranes. Measurement of tensile strength of nanofibrous membranes. Introduction to the apparatus for centrifugal spinning. Excursion to the cooperating companies. Due to the research activities of the UJEP team in the field of developing nanofibrous membranes for specific functions, the course content will be continuously innovated and supplemented with the results of the development of functional nanofibrous membranes.
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Studijní aktivity a metody výuky
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nespecifikováno
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Výstupy z učení
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The aim of this course is to introduce students to the principles of spinning of polymeric and inorganic materials using direct and alternating current, to various types of experimental setups and types of equipment for spinning using direct and alternating current, and to parameters that influence the properties of polymeric nanofibrous structures. Attention will also be paid to the technology of centrifugal spinning and its various variations (e.g. with the support of an electric field). A significant part of the course will be devoted to the functionalization of nanofibrous structures using: (1) chemical modifications (anchoring of molecules of various types of modifying substances) and (2) physical modifications (UV radiation, plasma modifications), or a combination of both procedures. The course will also include a practical part in the laboratory of nanofibrous structures at the Faculty of Science, UJEP.
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Předpoklady
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nespecifikováno
CNB/UNM a zároveň KFY/FMD a zároveň KFY/CHM1 a zároveň CNB/FCHM
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Hodnoticí metody a kritéria
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nespecifikováno
Credit for participation and prepared protocols from practical exercises; Oral exam
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Doporučená literatura
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Electrospinning: Principles, Practice and Possibilities (Polymer Chemistry Series), by Geoffrey R Mitchell; Royal Society of Chemistry 2015. ISBN 9781849735568.
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Electrospun nanofibers; edited by Mehdi Afshari, Woodhead Pubishing, 2017. ISBN 9780081009079.
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