Recyklovaná uhlíková vlákna
Title Alternative:Recycled Carbon Fibers
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Date
2008
Authors
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Technická Univerzita v Liberci
Abstract
Diplomová práce zkoumá parametry recyklovaných uhlíkových vláknen z textilních kompozitů. Zabývá se vlastnostmi uhlíkových vláken před a po tepelné pyrolýze. Tyto vlastnosti byly zjišťovány z pěti vzorků uhlíkovo-skelné tkaninové výztuže. Původní nerecyklovaný vzorek pod označením C Virgin slouží pro výrobu kompozitních desek uhlík-epoxid. Zbývající čtyři vzorky vznikly po tepelné pyrolýze kompozitní desky uhlík-epoxid. Pyrolýza byla provedena za určité teploty po určitou dobu. Z toho vzniklo označení vzorků. C 550 N2 znamená, že byl vorek recyklovaný při 550°C v dusíkové atmosféře. Vzorky C 550 vzduch, C 600, C 650 byly recyklované při teplotě 550°C, 600°C, 650°C na vzduchu. Od těchto skutečností se odvíjí vlastnosti uhlíkových vláken a vznikají mezi nimi určité rozdíly. Proto bylo na vláknech provedeno hned několik pokusů. Byl zjišťován průměr jednotlivých vláken d [{$\mu$}m], škodlivost úlomků prachových částic, měrná hmotnost {$\varrho$} [kg/m3], hmotnostní úbytky, jemnost T[tex]. U svazků vláken byla změřena jejich pevnost v tahu {$\sigma$} [MPa], tažnost [%] a modul pružnosti E [GPa]. Jak moc působí pracovní teplota a doba teplené pyrolýzy na jednotlivá vlákna je doloženo fotografiemi z elektronového rastrovacího mikroskopu.
This diploma thesis examine parameter the Recycled Carbon Fibres of Textile Composite. It is focused on carbon fibres properties before and after a thermal pyrolysis. These properties of carbon fibres have been found out from five samples of carbon-glass textural armature. The first sample is an original unrecycled sample known as C Virgin and it serves for production of carbon-epoxide composite panels. The other four samples have been caused by thermal pyrolysis of carbon-epoxide composite panel. This pyrolysis have been realised during specific and defined time and temperature. From this process the four mentioned samples have come into being. A sample C 550 N2 means that this sample was recycled at the temperature 550°C in nitrogenous atmosphere. The samples C 550, C 600, C 650 were recycled at the temperature 550°C, 600°C and 650°C on air. Carbon fibres properties are unwinded from this realistic facts and from this research were found out visibled differences between mentioned samples. It was realized a number of test on these samples. There were found out a diameter of fibres d [{$\mu$}m], powdery fragments harmfulness, density of fibros {$\varrho$} [kg/m3], their weight-shortages and finesess T [tex] of samples. From fibre-bundles were measured their tensile strenght {$\sigma$} [MPa], elongation to break [%] and modulus of elasticity E [GPa]. Documented photos from electron scanning microscope evidence how to influence temperature and the time of thermal pyrolysis the recycled carbon fibres of textile composite.
This diploma thesis examine parameter the Recycled Carbon Fibres of Textile Composite. It is focused on carbon fibres properties before and after a thermal pyrolysis. These properties of carbon fibres have been found out from five samples of carbon-glass textural armature. The first sample is an original unrecycled sample known as C Virgin and it serves for production of carbon-epoxide composite panels. The other four samples have been caused by thermal pyrolysis of carbon-epoxide composite panel. This pyrolysis have been realised during specific and defined time and temperature. From this process the four mentioned samples have come into being. A sample C 550 N2 means that this sample was recycled at the temperature 550°C in nitrogenous atmosphere. The samples C 550, C 600, C 650 were recycled at the temperature 550°C, 600°C and 650°C on air. Carbon fibres properties are unwinded from this realistic facts and from this research were found out visibled differences between mentioned samples. It was realized a number of test on these samples. There were found out a diameter of fibres d [{$\mu$}m], powdery fragments harmfulness, density of fibros {$\varrho$} [kg/m3], their weight-shortages and finesess T [tex] of samples. From fibre-bundles were measured their tensile strenght {$\sigma$} [MPa], elongation to break [%] and modulus of elasticity E [GPa]. Documented photos from electron scanning microscope evidence how to influence temperature and the time of thermal pyrolysis the recycled carbon fibres of textile composite.
Description
katedra: KTM; přílohy: 1 CD; rozsah: 97 s., 75 s. příloh
Subject(s)
uhlíkové vlákno, recyklované uhlíkové vlákno, textilní kompozit, průměr vlákna, pevnost vlákna, rizikový faktor, měrný povrch vlákna, škodlivost prachových úlomků, aspektní poměr, tepelná pyrolýza, carbon fibre, recycled carbon fibre, textile composite, fibre diameter, fibre tenacity, hazard factor, fiber density, powdery fragments harmfulness, aspect ratio, thermal pyrolysis