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Lecturer(s)
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Burgert Ladislav, doc. Ing. CSc.
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Course content
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1) Definition of the concept of composite, aspects for sorting composite. Composites of the first, second and third kinds. Division of composites by type of dispersion and matrix. Board composite - fiberglass. Synergistic effect. Examples of composites from nature as well as "artificially" prepared. Whisker. Thermoplastic reactoplast. Asbestos-cement plates. Glass fibres; basalt fibres and other inorganic fibres. Isotropy and anisotropy of composites. 2) Biomaterial (biological) material, biocompatibility, biopolymer, biocomposite, biodegradation. Biomaterials - types - metals, ceramics, polymers - composites. Sterilization of biomaterials. Examples of applications. 3) Composite intermediate phases, adhesion forces in composites - mechanical, chemical, physical. Wetness - Young's equation. Measurement of adhesion. 4) Mechanical properties of composite materials 'matria paradoxy' types of stress exerted. Tensile strength test - working diagram (working curve) - Basic ideas. Hook's law, Young's Flexibility Module - an expression of the strength of materials. Hysteresis Hysteresis curve. Voigt model of mechanical properties of composite. Percolation limit. 5) Polymer materials - polyamides - aliphatic aromatic, essential characteristics. Polycondensation - characteristics; polyads. Threading of polymers - ways of garnishing (from melt, from solution). Nanofibers - electrospinning. Polyimides - fibres. Imid resins. Molecular masses of polymers. 6) Polyolefins - radical polymerisation. Stereospecific polymerisation - polyadvertising - meaning. Polyethylene and polypropylene fibre - use in composites. Carbon fibres - preparation - properties, use. Carbon-carbon laminate (composite). Carbon nanotubes. Natural carbon modification. 7) Polyesters - characteristics, examples. Polyester resins. polycarbonate Methacrylic acid-based composites and their use in dentistry as a precursor to composites. Photoinitiation of polymerization reactions. Aliphatic polyesters - polylactides. Bayer-Wiliger reaction. Examples of biochemically degradable polyme - examples of use. 8) Biopolymers - cellulose, lignin. Use of cellulose in healthcare. Examples of other biopolymers based on monosaccharide derivatives - hyaluronic acid - incidence of use in medicine; chitin - chitosan.. Acquiring pulp and using it as raw material. Fibres (foils) from regenerated dcelose. Carboxymethylcellulose, oxidised cellulose, cyclodextrins. Natural polyprenes - vulcanisation - rubber (elastomer) deformation.
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Learning activities and teaching methods
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unspecified, Monologic (reading, lecture, briefing)
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Learning outcomes
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The aim of the subject is to introduce the listener to the concept of the technical expression of composites, its general characteristics and possibilities of preparation, especially with regard to use in medicine.
The test is oral. The basic form of the test is the debate over the selected circuits. The degree of knowledge acquired and the ability to combine knowledge acquired in the subject into the broader context of the field studied is examined.
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Prerequisites
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Basic knowledge from physics, physical chemistry and organic chemistry. Basic technical imagination.
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Assessment methods and criteria
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Oral examination
After graduating from the subject, the listener gets a basic idea of the composition, preparation and use of composites, which, in conjunction with the other subjects studied in the field, provides him with the prerequisites for further professional growth and participation in both industrial practice and scientific research.
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Recommended literature
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Ehrenstein, Gottfried W. Polymerní kompozitní materiály. Praha: Scientia, 2009. ISBN 978-80-86960-29-6.
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Hinestroza, Juan P. Cellulose based composites : new green nanomaterials. Weinheim: Wiley-VCH, 2014. ISBN 978-3-527-32719-5.
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