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Lecturer(s)
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Wiener Jakub, prof. Ing. Ph.D.
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Course content
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Lectures: 1)Color - physical and geometrical influences - the influence of the fineness of fibers, the effect of delustrant in fibers, the effect of coloring fibers and yarns. 2)The nature and strength of bonds between dyes and fibers, physical and chemical sorption, the sorption mechanisms of basic dyes. 3)Thermodynamics of sorption affinity, enthalpy and entropy of dyeing, dyeing equilibrium expressed in terms of sorption isotherms, and its relation to the type of binding, sorption isotherms overview. 4)The basic model of the process of dyeing, dyeing division into phases, equations of chemical kinetics and their application to heterogeneous systems. 5)Dyeing systems - reactive and disperse dyes, building of bonds between dye and fiber by reactive dyes, dye hydrolysis mechanism, affecting processes, particle size, dye dispersion, particle size relationship and their solubility. 6)Empirical relationships used to describe the kinetics of dyeing rate constant, rate of dyeing 7)Diffusion coefficient, diffusion models, dye migration, assessment of migratory properties of dyes, equalizing, radial distribution of dye in the fiber - determination, prediction, context, changes in distribution due to radial diffusion processes. 8)Dependence on temperature dyeing rate, activation energy of each dye systems, the physical meaning of activation energy, transition temperature dyeing 9)Isoreactivity - temperature control of dyeing process, the inclusion of velocity mathematical process, discussions, advantage of isoreactive dyeing process, on-line process control, real spectrophotometry dye bath, problems of spectral aditivity 10)Intensification of dyeing processes, debate the appropriateness of different methods such as ultrasound and mechanical intensifiers. 11)Theory of padding dyeing, dye bath exhaustion, modeling of process in laboratory conditions, the mathematical solution. 12)Unorthodox dyeing technology, dyeing from non-aqueous solvents - such as supercritical carbon dioxide. 13)Plasma modification of fibers. 14)Trends in textile chemistry, biotechology. Laboratory exercises: Practical tasks according to laboratory substances discussed in the lectures.
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Learning activities and teaching methods
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Monological explanation (lecture, presentation,briefing), Laboratory work
- Class attendance
- 56 hours per semester
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Learning outcomes
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In this course students obtain an overview of in the theory of finishing processes. Special attention is focused on the analysis of practical problems in order to understand the principles of technological solutions. Students will be acquainted with the thermodynamics of sorption processes, influence of temperature on diffusion processes in polymers, relationship between structure and properties of dyes, coloration properties of textile substrate and novel methods of textile finishing.
Knowledge lectured subject - theoretically and practically.
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Prerequisites
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Basic knowledge of chemistry.
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Assessment methods and criteria
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Combined examination
The credit: Finishing on all laboratory exercises. Elaborate and defence laboratory records. Finishing on knowledge test over fix limit of point figure. The examination: be composed of written and vive part.
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Recommended literature
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Dembický J., Kryštůfek J., Machaňová D., Odvárka J., Prášil M., Wiener J. Zušlechťování textilií. TU Liberec, 2008. ISBN 978-80-7372-321-7.
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Hladík V. a kol. Textilní barvířství. Praha, 1982.
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Kryštůfek J., Wiener J. Barvení textilií I.. TU Liberec, 2008. ISBN 978-80-7372-328-6.
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Pastrnek R., Vlach P. Finální úpravy textilií. TU Liberec, 2002.
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Růžička J., Výprachtický J., Pajgrt O., Hác V., Čáp J., Janák P. Technologie předúprav, finálních a speciálních úprav textilních materiálů. VŠCHT Pardubice, 1985.
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