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Vpliv nastanka omrežja ogljikovih nanocevk na časovno odvisno vedenje polietilena visoke gostote
ID Hrastel, Anže (Author), ID Slemenik Perše, Lidija (Mentor) More about this mentor... This link opens in a new window

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Abstract
Nanokompoziti, izdelani z ogljikovimi nanocevkami, odpirajo nova področja uporabe nanokompozitov in razumevanja fizikalno-kemijskih povezav, kjer nanocevke zaradi svojih unikatnih lastnosti predstavljajo superiorno nanopolnilo. Izjemna trdnost in sposobnost efektivnega prenosa elektronov sta le dve od lastnosti, ki jim dajejo posebno mesto v mehaniki in elektroniki. Izkaže se, da nanocevke vzpostavijo naključno povezano omrežje v matričnem materialu že pri nizkih koncentracijah, kar močno spremeni fizikalne lastnosti materiala. V predstavljenem delu smo preučili vpliv volumskega deleža na ojačitev materiala in spremembo časovno odvisnih lastnosti. Ugotovili smo, da z dodajanjem nanocevk izboljšamo mehansko vedenje materiala le v primeru, ko se vzpostavi omrežje. Vzpostavitev omrežja nad perkolacijsko mejo pospeši časovno odvisne procese, le to material oslabi.

Language:Slovenian
Keywords:ogljikove nanocevke, nanokompoziti, omrežje CNT-jev, lezenje, časovno odvisne lastnosti
Work type:Master's thesis/paper
Typology:2.09 - Master's Thesis
Organization:FS - Faculty of Mechanical Engineering
Place of publishing:Ljubljana
Publisher:[A. Hrastel]
Year:2022
Number of pages:XX, 60 str.
PID:20.500.12556/RUL-137015 This link opens in a new window
UDC:620.3:620.17:546.262.5(043.2)
COBISS.SI-ID:109906435 This link opens in a new window
Publication date in RUL:28.05.2022
Views:983
Downloads:74
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Secondary language

Language:English
Title:Efect of carbon nanotube network formation on time-dependent behavior of high-density polyethylene
Abstract:
Nanocomposites prepared with carbon nanotubes open up new areas of application of nanocomposites and understanding of physicochemical inteactions, where nanotubes are a superior nanofiller due to their unique properties. Their exceptional strength and ability to efficiently transfer electrons are just some properties that give them a special place in mechanics and electronics. It turns out that nanotubes form a randomly connected network in the matrix material already at low concentrations, which significantly changes the physical properties of the material. In the presented work, we studied the effect of volume fraction on material reinforcement and the change of time-dependent properties. The results showed that the addition of nanotubes improves the mechanical behaviour of the material only when a network is established. The formation of the network above the percolation limit speeds up time-dependent processes, which weakens the material.

Keywords:carbon nanotubes, nanocomposites, CNT network, creep, time-dependent behavior

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